Ветроколесо

Изобретение относится к ветроэнергетике. Ветроколесо содержит ступицу и лопасти. Лопасти изготовлены в виде пластины, в которой выполнены две продольные прорези на расстояние не менее ширины лопасти до внешних краев ветроколеса. В самой зоне внешних краев ветроколеса выполнены две поперечные прорези, начинающиеся от внешних концов продольных прорезей и имеющих длину не менее одной третьей ширины лопасти. Внешние края пластины выполнены в Z-образной форме, а на ступице закреплены внутренние края лопастей, полученных из пластины путем формирования прорезей. Изобретение направлено на повышение жесткости. 5 ил.

Rotorblatt einer Windenergieanlage

Die Erfindung betrifft ein Rotorblatt (1) einer Windenergieanlage mit einer Rotorblattwurzel (4) zum Anbinden des Rotorblattes (1) an eine Rotornabe und einer zur Rotorblattwurzel (4) abgewandten Seite angeordneten Rotorblattspitze sowie eine Windenergieanlage mit solchen Rotorblättern. Dabei weist eine relative Profildicke, die als Verhältnis von Profildicke (2) zu Profiltiefe (3) definiert ist, in einem mittleren Bereich (6) zwischen Rotorblattwurzel und Rotorblattspitze ein lokales Maximum auf.

Blattprofil für windturbine

Wind turbine comprises rotor blade, and rotor hub bearing rotor blade, where rotor hub is connected directly or indirectly with generator through drive shaft

The wind turbine comprises a rotor blade, and a rotor hub bearing the rotor blade. The rotor hub is connected directly or indirectly with a generator through a drive shaft. An opening is provided at the rotor blade. The opening is pressurized with a negative pressure or overpressure. An independent claim is also included for a method for influencing a flow pattern in a barrier layer of a rotor blade of a wind turbine.

Wind turbine blade provided with surface mounted device

Flap control for wind turbine blades

Propeller assembly

A propeller blade 18 spanning radially from a root 32 to a tip 34 and spanning axially from a leading edge 36 to a trailing edge 38 forming a set of airfoil sections 56 (see figures 3A-3D) there between, wherein a sweep line 62 (spline fitted through points along the chord line 46) comprises at least one inflection point 59 at which the sweep line 62 changes between being concave and convex. The blade 18 may define an S-shaped planform. The inflection point 59 may be located in the inner region I between the blade root 32 and fifty percent of total blade length L. The propeller blade 18 may have a waived trailing edge 38, a straight spar structure 54, and a variable sweep angle (see figure 5A) ranging from fifty to ninety degrees. The highly swept portion may reduce propeller noise. The blade 18 may comprise a backward swept section inner region, which may increase efficiency. The leading edge 36 at the blade spinner coupling may be rearwardly angled (see figure 5B), which may enhance spinner ...

Rotor blade extension portion having a skin located over a framework

TOOTHED ONE AND FLEXIBLE ONE WIND TURBINE WING REAR EDGE

WIND TURBINE BLADE WITH EDDY PRODUCERS

WIND TURBINE BLADE WITH BEND FLAPS, THE OF SURFACE PRESSURE CHANGES STEERED

Rotor blade for a wind turbine

Die Erfindung betrifft ein Rotorblatt (3) für eine Windkraftanlage (1), wobei das Rotorblatt (3) eine Oberfläche aufweist, welche bei einer bestimmungsgemäßen Verwendung des Rotorblattes (3) eine Luftströmung umlenkt, um eine Energie der Luftströmung in eine Bewegungsenergie des Rotorblattes (3) umzuwandeln, wobei eine Größe der Oberfläche des Rotorblattes (3) variierbar ist. Um einen optimierten Betrieb einer Windkraftanlage (1), welche ein solches Rotorblatt (3) aufweist, zu ermöglichen, ist erfindungsgemäß vorgesehen, dass das Rotorblatt (3) zumindest einen Luftkanal mit zumindest einer Lufteintrittsöffnung an einer Saugseite des Rotorblattes (3) und zumindest einer Luftaustrittsöffnung an einer Druckseite des Rotorblattes (3) aufweist, wobei die Lufteintrittsöffnung in Bezug auf eine Luftströmungsrichtung bei einer erfindungsgemäßen Verwendung des Rotorblattes (3) näher an einer Vorderkante des Rotorblattes (3) angeordnet ist als die Luftaustrittsöffnung.

A wind turbine rotor blade comprising one or more means secured to the blade forchanging the profile thereof depending on the atmospheric temperature

Control of power, loads and/or stability of a horizontal axis wind turbine by use of variable blade geometry control

ROTOR BLADE FOR A WIND TURBINE

Airfoil section

Airfoils for wind turbine

WIND TURBINE BLADE WITH POCKET-SHAPED DRAG PORTION, REVERSED-ORIENTATION AIRFOIL TRAILING SAME, AND AUXILIARY BLADE SUPPORTS

A unique wind turbine blade features a drag element having a concave surface for impingement of airflow thereagainst to create a drag force, and an airfoil having a rounded edge and an opposing sharper edge. The sharp edge points toward the drag element from a side thereof to which the concave surface faces, and the rounded edge points away from the drag element on the same side thereof as the sharp edge such that the sharp edge leads the rounded edge under movement of the drag element by the drag force. A unique wind turbine features an auxiliary support bearing disposed at a spaced axial distance from the rotor, and an auxiliary blade support connection spanning from the auxiliary bearing to the blade at a distance spaced axially from where a rotor blade support connects to said blade.

WIND TURBINE ROTOR BLADE AND WIND TURBINE SYSTEM

The invention relates to a rotor blade of a wind turbine system. The rotor blade comprises a blade root for connecting the rotor blade to a rotor hub, an inner blade section which extends from the blade root in the direction of the longitudinal axis of the rotor blade, at least one trailing edge segment section of a trailing edge segment for increasing the profile depth of the rotor blade at the blade root, and at least one first and second securing section for securing the at least one trailing edge segment section of the trailing edge segment to the inner blade section. The first securing section is arranged at a specified distance from the second securing section in the direction of the longitudinal axis of the rotor blade, and the at least one trailing edge segment section of the trailing edge segment is secured to the inner blade section such that loads occurring on the inner blade section are transmitted onto the at least one trailing edge segment section of the trailing edge segment ...

PROPELLER ASSEMBLY

A propeller blade (18) spanning radially from a root (32) to a tip (34) and spanning axially from a leading edge (36) to a trailing edge (38) spaced from the leading edge forming an airfoil (39) therebetween where a sweep line (62) can be defined as a spline fitted through points which are positioned along the chord line. The propeller blade having at least one spline (40, 42) defining the leading edge or trailing edge.

ROTOR BLADE FOR A WIND POWER INSTALLATION

The invention concerns a rotor blade for a wind power installation. The degree of efficiency of rotor blades is determined by the afflux angle, that is to say the angle between the rotor blade profile chord and the afflux direction of the air. Particularly in the case of wind power installations the afflux angle depends on the rotor blade speed - that is to say the speed of rotation of the rotor - and the wind direction: the afflux direction is distinguished by the sum vector of the wind speed v Wind and the speed of the rotor blade tip v Tip, the effective afflux speed v eff, see Figure 1, See Formula 1. The object of the invention is therefore that of reducing the sensitivity of a rotor blade to turbulent wind flows. A rotor blade for a wind power installation which is divided in its longitudinal direction into at least two portions which are integrally connected together and which are designed for different high-speed indexes, wherein the high-speed index, associated with the maximum ...

ROTOR BLADE FOR A WIND POWER PLANT

The invention relates to a rotor blade for a wind power plant and a wind power plant. The aim of the invention is to create a profiled rotor blade or wind power plant that exhibits superior performance as opposed to the past. Said aim is achieved by a rotor blade, the cross section of which has a maximum thickness at a location lying within a range of about 15 to 40 percent relative to the profile depth, preferably within a range of about 23 to 28 percent, the maximum profile thickness ranging between about 20 and 45 percent, preferably between about 32 and 36 percent.

POWER GENERATING APPARATUS

Power generating apparatus (10) comprises a housing (14) and a wind turbine (12) within the housing. The wind turbine comprises a plurality of rotatable turbine blades (66). The housing has a forward region (20) extending forwardly of the wind turbine, the forward region defining an inlet opening (22) for air, and a rearward region (24) extending rearwardly of the wind turbine, the rearward region defining an outlet opening for air.

WIND TURBINE

The invention relates to a wind turbine rotor blade comprising a suction side (216), a pressure side (217), a region (214) near the root, a rotor blade tip (213), a rotor blade front edge (211), and a rotor blade rear edge (212). Said rotor blade also has a plurality of stagnation points along the length of the rotor blade, which together can form a stagnation point line (215). A plurality of vortex generators are provided in the region of the stagnation point line (215) which is located on the underside (generally referred to as the pressure side) of the rotor blade.

ROTOR BLADE OF A WIND TURBINE AND WIND TURBINE

The invention relates to a rotor blade of an aerodynamic rotor of a wind turbine, comprising: at least one first and one second wing fence (810, 820), wherein the first wing fence (810) is arranged on the rotor blade in radial direction, relative to an axis of rotation of the rotor, in a range of 25%-40%, and the second wing fence (820) is arranged on the rotor blade in radial direction, relative to the axis of rotation of the rotor, in a range of 45%-60%.

POWER MACHINE ROTOR BLADE WITH BULGES

The stability of power generation efficiency against variation of fluid speed and direction can be improved. The disclosed rotor 1 for a wind or water power machine includes a hub 10, supported by a main shaft, and blades 20, each having a root end 21 connected to the hub. In a projection plane perpendicular to a rotational center axis O of the rotor, a leading edge 31 of the blade has leading edge bulge portions 36 and 37 protruding forward in the rotor rotational direction only at two different locations in the rotor radial direction.

ROTOR BLADE FOR A WIND POWER PLANT

The invention relates to a rotor blade (1) for a wind power plant, comprising a rotor blade root (4) for the connection of the rotor blade (1) to a rotor hub and a rotor blade tip arranged on the side facing away from the rotor blade root (4), as well as a wind power plant comprising such rotor blades. A relative profile thickness (2), which is defined as a ratio of profile thickness (2) to profile depth (3), has a local maximum in a centre region (6) between the rotor blade root and rotor blade tip.

ROTOR BLADE FOR A WIND POWER PLANT

The invention relates to a rotor blade (1) for a wind power plant, comprising a rotor blade root (4) for the connection of the rotor blade (1) to a rotor hub and a rotor blade tip arranged on the side facing away from the rotor blade root (4), as well as a wind power plant comprising such rotor blades. A relative profile thickness (2), which is defined as a ratio of profile thickness (2) to profile depth (3), has a local maximum in a centre region (6) between the rotor blade root and rotor blade tip.

Wind energy device for generating electrical energy from wind energy produced at wall of multi-story building for e.g. charging car battery, has support and cover that are provided for fastening turbine to wall of building

The device has a turbine for generating electrical energy from flow (41) of wind energy produced at a wall (W) of a building. A support (30) and a cover are provided for fastening the turbine to the wall. A turbulence chamber is connected upstream of the turbine for reinforcing helicity of the flow of wind energy. The turbine has a stator with a cage that is aligned towards the chamber and a rotor with rotor blades, where the rotor is rotated around a rotational axis. The turbine has a turbine blade whose inclination is adjusted opposite to physical rotational axis of the rotor.

Rotor blade for Windturbine.

Die vorliegende Erfindung bezieht sich auf einen Rotor, insbesondere auf ein Rotorblatt (1) einer Windturbine, mit reduziertem Rotordurchmesser bei gesteigerter Leistung.

Aerodynamically optimized rotor blade.

Ein Rotorblatt (1) für einen Rotor (2) weist eine Anströmseite (11) und eine Abströmseite auf. Die Anströmseite (11) und die Abströmseite erstrecken sich von einem Rotorblattgrund (15) bis zu einer Rotorblattspitze (16), wobei die Anströmseite (11) und die Abströmseite in einem luvseitigen Kantenbereich (13) oder in einem leeseitigen Kantenbereich (14) aneinander angrenzend angeordnet sind. Das Rotorblatt (1) enthält einen Strömungskanal (20), der sich vom luvseitigen Kantenbereich (13) zum leeseitigen Kantenbereich (14) erstreckt.

Aerodynamisch optimiertes Rotorblatt.

Ein Rotorblatt (1) für einen Rotor (2) weist eine Anströmseite (11) und eine Abströmseite auf. Die Anströmseite (11) und die Abströmseite erstrecken sich von einem Rotorblattgrund (15) bis zu einer Rotorblattspitze (16), wobei die Anströmseite (11) und die Abströmseite in einem luvseitigen Kantenbereich (13) oder in einem leeseitigen Kantenbereich (14) aneinander angrenzend angeordnet sind. Das Rotorblatt (1) enthält einen Strömungskanal (20), der sich vom luvseitigen Kantenbereich (13) zum leeseitigen Kantenbereich (14) erstreckt.

Eolienne axiale à pales profilées issues de l'expérience de la marine à voile.

L' invention veut adapter les connaissances de la marine à voile à la récupération de l'énergie éolienne, pour mieux l'utiliser comme énergie mécanique ou la convertir en électricité. L'éolienne est dotée de pales profilées rigides (1), trapézoïdales, carrées, triangulaires ou autre, avec un profil semblable à une voile de bateau. L'invention va permettre une réduction des dimensions, des contraintes mécaniques, des nuisances et des coûts. La rotation est relativement lente et silencieuse et permet aux aviateurs et oiseaux de repérer les dangers plus aisément. Elle peut être auto-orientable grâce à la position du rotor et des pales sous le vent du mât (4).

Wind turbine airfoil family

Wind turbine providing increased power output

Boundary layer fins for wind turbine blade

WIND TURBINE ROTOR BLADE ELEMENT AND WIND TURBINE ROTOR BLADE

According to the present invention, a wind turbine rotor blade element (50, 60, 80) comprising a first portion (51, 61, 81) and a second portion (52, 62, 82) which are connected with each other is described. The first portion (51, 61, 81) comprises a rear surface (53, 63) for facing a surface of a wind turbine rotor blade (5) and the second portion (52, 62, 82) comprises a top surface (56, 66) which includes an angle (57) between 90° and 180° with the rear surface (53, 63) of the first portion (51, 61, 81). COPYRIGHT KIPO 2018 ...

풍차용 블레이드

... 아크릴 수지 발포체로 형성된 심재와, 당해 심재를 덮는 외피를 구비하고, 상기 외피가 카본 섬유와 수지를 포함하는 섬유 강화 수지재로 형성되어 있고, 상기 아크릴 수지 발포체가 특정 굽힘 탄성률을 갖는 풍차용 블레이드를 제공한다.

WIND TURBINE BLADE, WIND POWER GENERATING DEVICE COMPRISING SAME, AND WIND TURBINE BLADE DESIGN METHOD

WIND TURBINE ROTOR BLADE

A wind turbine blade is described, which extends in a spanwise direction from a root end to a tip end and defines an aerodynamic airfoil cross-section between a leading edge and a trailing edge in a chordwise direction transverse to the spanwise direction. The blade has a camber in the chordwise direction and includes a blade body and a moveable flap. The flap is moveable relative to the blade body to vary the camber of the blade. A deformable panel is located between the blade body and the moveable flap. The panel has an undulating profile comprising an alternating succession of ridges and troughs, which each extend in a first direction. The panel is formed of a material having anisotropic intrinsic stiffness with maximum anisotropic intrinsic stiffness being transverse to the first direction. In a preferred embodiment, the deformable panel is corrugated.

WIND TURBINE BLADE HAVING A SHAPED STALL FENCE OR FLOW DIVERTER

A wind turbine blade is described wherein at least one stall fence is provided on the blade surface, where the stall fence is arranged such that it extends at an angle to the chord of the blade. The stall fence acts to re-direct airflow over the blade, to improve wind turbine performance. The stall fence may be a provided towards the blade root end, acting to divert airflow towards the root end of the blade to prevent separation of attached airflow. Additionally or alternatively, the stall fence may be arranged as a flow diverter provided towards the blade tip end, to increase airflow in the tip region for increased performance and/or to disrupt the formation of tip vortices.

ENERGY OUTPUT LIMITER FOR WIND TURBINE ROTOR(S)

A horizontal axis wind turbine blade configuration is provided which is adapted to dissipate the energy which would otherwise exceed the capacity of the energy conversion system, when the wind speed and/or the wind turbine rotational speed exceed(s) levels established by the particular design. Aerofoil section(s) (A) connected to a HAWT rotor hub dissipate some of, and under severe operating conditions can dissipate virtually all of, the energy that the conventional wind turbine blade(s) or blade section(s) extract from the wind. The aerofoil Section(s) (A) are configured to use aerodynamic lift in a similar manner to a propeller or lift rotor as the principle energy dissipation mechanism when the rotor speed exceeds a certain value for a particular pertaining wind speed, that rotor speed being an outcome of the overall design.

WING ABLE TO ENHANCE LIFT BY INTERNAL AIR FLOW

Wing able to enhance lift power by inner air flow, is solution of wing that results in increased and changeable lift power, with lesser increase of aerodynamic resistance than with conventional wings. In the invention basic embodiment, the wing is provided with free aerodynamic air-flow through a specially designed tunnel (4) running from the opening below the wing front edge (5) to the wing exit edge (6). Turning of the blades (11) enables adjusting of angle of the air flow (13) exiting from the tunnel (4), and their synchronous turning with the gate (15) enables partial or complete closing of the tunnel (4) and turning of the wing into a l conventional wing with closed profile contour. The principle of this technical solution is applicable, with adequate adjustments, to glider-paraglider and kite wings, made of fabrics, and to wind-generator rotor wings.

Wind turbine blade with a trailing edge spacing section

A wind turbine blade is provided with two shell parts each at least partly made of a sandwich structure including an inner skin (76), an outer skin (74), and an intermediate core material (75, 77), wherein the shell parts are bonded together at least along their respective leading edges (18). The blade also comprises a longitudinally extending spacing section in which the respective trailing edges (58a, 58b) of the pressure side shell part and the suction side shell part are spaced apart, wherein a trailing edge shear web (45) is arranged between and connected to the sandwich structure of the suction side shell part (84, 86, 87) and the sandwich structure of the pressure side shell part (74, 76, 77).

Wind turbine and blade therefor

A wind turbine comprising a wind turbine blade with high lift and/or low solidity is provided. The blade is directed towards pitch regulated wind turbines, which are operated at variable rotor speed and have blades longer than about 30 meters. The blade is for example advantageous in that it may provide reduced extreme- and fatigue loads at the same or near the same power production.

Wind turbine rotor blade

Windenergieanlagenrotorblatt mit einer Blattspitze (10), einer Blattwurzel (12), einer Vorderkante (16), einer Hinterkante (18), einer Druckseite (32), einer Saugseite (30) und einem Querschnitt, der sich von der Blattspitze (10) zur Blattwurzel (12) hin ändert, wobei der Querschnitt in der Mitte (14) des Rotorblatts von einem aerodynamischen Profil gebildet und an der Blattwurzel (12) im Wesentlichen kreisförmig ist und der Querschnitt in einem Längsabschnitt des Rotorblatts, der zwischen der Blattwurzel (12) und der Mitte (14) des Rotorblatts angeordnet ist, Folgendes aufweist: • einen konvexen Druckseitenabschnitt (78), der sich von der Vorderkante (16) bis zu einem druckseitigen Wendepunkt (80) erstreckt, • einen konkaven Druckseitenergänzungsabschnitt (82), der sich an den druckseitigen Wendepunkt (80) mit stetiger Krümmung anschließt und sich bis zur Hinterkante (18) erstreckt, • einen konvexen Saugseitenabschnitt (72), der sich von der Vorderkante (16) bis zu einem saugseitigen Knick ...

Wind turbine rotor blade

A wind turbine rotor blade (1) with a suction side (13) and a pressure side (15) is provided. It comprises a cylindrical root portion (3) an airfoil portion (5) defining the suction side (13) and the pressure side (15), and a transition portion (7) which is located between the airfoil portion (5) and the root portion (3). The transition portion (7) has a transition profile changing from the airfoil of the airfoil portion (5) to the cylindrical profile of the root portion (3). The leading section of the transition profile is cylindrical and the trailing section of the transition profile is elongated. In the rotor blade, the maximum chord length of the airfoil portion (5) is at least the maximum chord length of the transition portion (7). In addition, the transition profile comprises a section with a concave curvature (25) on the pressure side (15) of the rotor blade (1).

SEGMENTED ROTOR BLADE EXTENSION PORTION

WIND TURBINE ROTOR BLADE FLOW GUIDING DEVICE AND WIND TURBINE ROTOR BLADE

Wind power generating apparatus and axial flow type blade

A wind power generating apparatus including a rotor 1 configured by a hub 43 (fig 4), the hub including a pitch bearing 41 (fig 4) for controlling the angle of fixing each of the blades, each of the blades being connected to the hub via the bearing, the cross sectional area of the blade is gradually decreased from the vicinity of a connecting portion 10 with the pitch bearing toward the tip end portion 11 of the blade. The rotor may be of an axial flow type blade. A pitch bearing drive may feature as part of the pitch bearing assembly. The cross section of the connecting root portion 10 of the blade to the hub may be cylindrical.

Wind power generating apparatus and axial flow type blade

Wind turbine blade and rotor incorporating same

A wind turbine blade has an aerofoil section resembling that of an aircraft wing with a high lift device (for example a slotted flap (7) defining a slot (5)). The wind turbine rotor is provided with a plurality of such blades set at an appropriate angle of incidence so that the blades are operating close to the stalling angle. The blade cross-section has a CL/CD of at least 75, and a CLmax of at least 1.8 at a stalling angle of no more than 12 DEG .

Aerodynamic overspeed limitation for wind turbine rotor(s)

A horizontal axis wind turbine blade configuration is disclosed which can dissipate the energy which would otherwise exceed the capacity of the energy conversion system, when the wind speed and/or the wind turbine rotational speed exceed(s) levels established by the particular design. 'Auxiliary Aerofoil Section(s)' are connected to a wind turbine rotor hub which under particular operating conditions dissipate some of, and under severe conditions dissipate virtually all of, the energy that the conventional wind turbine blade(s) or blade section(s) extract from the wind. The Auxiliary Aerofoil Section(s) are configured to function as a propeller using aerodynamic lift as the principle energy dissipation mechanism when the rotor speed exceeds a certain value for a particular pertaining wind speed, that rotor speed being an outcome of the overall design. The 'Auxiliary Aerofoil Sections" may be provided at the tips of the primary aerofoil sections or separate auxiliary and primary blades may ...

Extension portion for wind turbine blade

A wind turbine rotor blade extension portion 30 comprises a plurality of segments located adjacent one another in a span-wise sense. An interface between adjacent segments is configured to inhibit transmission of longitudinal loads between segments and may comprise cooperating edge profiles with sealing means (such as elastomeric members, inflatable members or labyrinth seal members) therebetween. Each segment comprises a first surface 140a-e and a second surface 150a-e. The first surface is spaced from the second surface at a proximal region 170 of the extension portion and the first surface is connected to the second surface at a distal region 160 of the extension portion to thereby generate a an extended trailing portion for a rotor blade 10 to which the extension portion 30 is connected, in use. In another aspect a wind turbine blade having an extension portion is provided wherein the extension portion is configured to provide a streamlined extension surface whilst inhibiting span-wise ...

WIND ENERGY PLANT

WIND TURBINE ROTOR BLADE

WIND TURBINE ROTOR BLADE AND INCLINATION-STEERED WINDTURBINE

ROTOR BLADE PROFILES FOR WIND ENERGY PLANTS

ROTOR BLADE FOR A WIND ENERGY PLANT

SHEET FOR A WIND TURBINE ROTOR

ELEMENT FOR PRODUCING A DYNAMIC FLUID STRENGTH

ROTOR BLADE FOR A WIND-POWER PLANT

A WING FOR A WINDMILL

Wind turbine with slender blade

Wind turbine

A wind turbine or windmill blade for attachment to a hub of a wind turbine or windmill wherein the angle of the leading edge of the blade is within 20 degrees of an angle of apparent wind and the angle of apparent wind is equal to the arctangent of rotational speed of the blade divided by true wind speed where the speeds are in the same units and a windmill or wind turbine having such blades and having apparatus for controlling rotational speed of the blades so that the angle of apparent wind is within 20 degrees of the angle of the leading edge of the blades.

A WIND TURBINE BLADE COMPRISING A TRAILING EDGE NOISE REDUCING DEVICE

This invention relates to a noise reducing device and a wind turbine blade comprises such a noise reducing device. The noise reducing device comprises a number of noise reducing elements projecting from a base part. A plurality of airflow modifying elements are attached to or integrated into the noise reducing elements. The airflow modifying elements extend from a local first end to a local second end along at least one of the first and second side surfaces. The airflow modifying elements has a height of no more than two-thirds of the boundary layer thickness and spacing of no more than one-thirds of the boundary layer thickness. The noise reducing elements are preferably serrations. The airflow modifying elements are preferably vanes projecting perpendicularly from the side surface of the noise reducing elements.

ROTOR BLADE FOR A WIND POWER PLANT

The invention relates to a rotor blade for a wind power plant and a wind power plant. The aim of the invention is to create a profiled rotor blade or wind power plant that exhibits superior performance as opposed to the past. Said aim is achieved by a rotor blade, the cross section of which has a maximum thickness at a location lying within a range of about 15 to 40 percent relative to the profile depth, preferably within a range of about 23 to 28 percent, the maximum profile thickness ranging between about 20 and 45 percent, preferably between about 32 and 36 percent.

BLADE OF A WIND TURBINE

A blade of a wind turbine is presented. This blade is provided with a root section for connecting the blade to the shaft or hub of the turbine. The blade also contains a wind-energy-absorbing profile which is optimized for wind flow. The output of the wind turbine is increased by providing the root section with a member that is designed in such a way that the assembly consisting of said member and the root section can absorb wind energy and will increase the overall efficiency of the wind turbine.

WIND ENERGY TURBINE ROTOR BLADE

The invention relates to a wind turbine rotor blade (1), comprising a top side (13), a bottom side (14), a leading edge (16), a trailing edge (15), a hub fastening means (17), and a blade tip (12), wherein the wind turbine rotor blade (1) is divided into a hub region (111), a center region (112), and a blade tip region (113) and wherein a root region (11) from the hub fastening means (17) to the maximum blade depth (Smax) is defined, wherein an air-conducting channel (23) extending radially outward for conducting suctioned air from a suction region (21) to a blow-out region (22) arranged in the blade tip region (113) is provided inside the wind turbine rotor blade (1) and boundary layer suctioning occurs, wherein the suctioning of the air occurs on the top side (13) of the wind turbine rotor blade (1), and a boundary layer fence (28) is provided in the hub region (111) near the hub fastening means (17) in order to prevent a flow in the direction of the hub fastening means (17).

WIND TURBINE ROTOR BLADE TRAILING EDGE SEGMENT

The invention relates to a trailing-edge segment (2, 112) of a wind-turbine rotor blade for increasing a profile depth of the rotor blade (1, 108) of a wind turbine (100). The trailing-edge segment (2, 112) of a wind-turbine rotor blade comprises at least one inner blade segment (6, 7, 8), having an inner blade shell (12), at least one middle blade segment (5), having a middle blade shell (11). In this case, the at least one middle blade segment (5) and the at least one inner blade segment (6, 7, 8) can be coupled to each other via a coupling means (25), and the coupling means (25) has at least one shell element (13, 53), having two inner sides (22, 62) that are parallel to each other and form a receiving space (66), designed to receive at least one of the inner blade shell (12) or middle blade shell (11), and the two inner sides (22, 62) each being realized such that they can be connected to at least one of the inner blade shell (12) or middle blade shell (11), in such a manner that a ...

ACTIVE CONTROL SURFACES FOR WIND TURBINE BLADES

A wind turbine has a longitudinal airfoil blade that exerts a torque on the generator in response to an impinging air current. A compliant airfoil edge arrangement is disposed along an edge of the airfoil blade for at least a portion of a longitudinal dimension of the airfoil blade. A morphing drive arrangement varies a configuration of the compliant airfoil edge arrangement and consequently the aerodynamic characteristics of the airfoil blade. A drive arrangement applies actuation forces to the upper and lower compliant surfaces via the upper and lower actuation elements. The compliant airfoil edge is arranged as a trailing edge of the airfoil blade.

ROTOR BLADE FOR A WIND TURBINE

The present invention relates to a rotor blade (1) and a corresponding rotor for a wind turbine having a reduced rotor diameter and improved performance. The rotor blade (1) for a wind turbine has a blade root (3) with a defined first diameter as an attachment to a hub, and a rotor blade end (2), with a second defined diameter, opposite the blade root. The rotor blade (1) also has a trailing edge (7) and a leading edge (8) in relation to the direction of rotation of the rotor blade (1) during operation. The leading edge (8) and the trailing edge (7) each have a curvature. The first diameter is smaller than the second diameter.

MOUNTABLE WING TIP DEVICE FOR MOUNTING ON A ROTOR BLADE OF A WIND TURBINE ARRANGEMENT

A mountable wing tip device (102) for mounting on a rotor blade of a wind turbine is disclosed which comprises a forward extremity (106) and at least two rearward extremities (108A, 108B, 112), wherein the forward extremity (106) and the at least two rearward extremities (108A, 108B, 112) are triangularly arranged, a leading edge region extending between the forward extremity (106) and the at least two rearward extremities (108A, 108B, 112), and a trailing edge region extending between the rearward extremities (108A, 108B, 112), a root region (113) at which the wing tip device (102) is mountable on an end of the rotor blade, wherein the root region (113) is positioned between the leading edge region and the trailing edge region.

ЛОПАСТЬ РОТОРА ВЕТРЯНОЙ ИЛИ ВОДЯНОЙ ТУРБИНЫ

Настоящее изобретение относится к лопасти ротора ветряной или водяной турбины, имеющего втулку, от которой, по существу, радиально проходит по меньшей мере одна лопасть, которая имеет корневую зону, расположенную ближе всего к втулке, переходную зону, проходящую от втулки, и, по меньшей мере/ аэродинамическую поверхность. Согласно настоящему изобретению лопасть имеет по меньшей мере один продольный канал, который имеет входное отверстие на передней стороне указанной аэродинамической поверхности и выходное отверстие на задней стороне указанной аэродинамической поверхности, причем указанный по меньшей мере один продольный канал имеет проходное сечение, которое уменьшается от входного отверстия к выходному отверстию. Таким образом обеспечено, что в указанном канале протекающий через него воздух имеет повышенную скорость, что приводит к увеличению энергии, получаемой от ветра, обегающего лопасть.

Wind turbine blade with noise reduction devices and related method

The present disclosure relates to a wind turbine blade, in particular a wind turbine blade having devices or structures for reducing noise generated by the wind turbine blade during use and related method. The wind turbine blade comprises at least a first longitudinal section having a cross section perpendicularly to a longitudinal direction, the cross section having a plurality of flow modulating devices including a first primary flow modulating device and a secondary flow modulating device for modulating noise spectra, wherein the first primary flow modulating device and the first secondary flow modulating device are spaced perpendicularly to the longitudinal direction. Also disclosed is a method of retrofitting a wind turbine blade.

Wind turbine blade with variable trailing edge

For the blade of the wind turbine

A SYSTEM AND METHOD FOR TRAILING EDGE NOISE REDUCTION OF A WIND TURBINE BLADE

A system and method for reducing the operational noise of a blunt trailing edge of a wind turbine blade is described. The system involves increasing the trailing edge solid angle at the blade trailing edge by providing a wedge element or projection adjacent the trailing edge of the blade, the wedge element acting to provide improved mixing of the suction side and pressure side flows at the blunt trailing edge, thereby reducing the strength of vortex shedding at the trailing edge and the associated operational noise.

Wind Turbine Blade

A wind turbine comprising a wind turbine blade with high lift and/or low solidity is provided. The blade is directed towards pitch regulated wind turbines, which are operated at variable rotor speed and have blades longer than about 30 meters. The blade is for example advantageous in that it may provide reduced extreme and fatigue loads at the same or near the same power production.

REDUCED NOISE VORTEX GENERATOR FOR WIND TURBINE BLADE

A vortex generating foil (A-G) extending from an aerodynamic surface () of a wind turbine blade (), the foil having a nest shape (A, F-G) along a suction side (A-G) of the foil effective to reduce flow separation between the foil and a leading edge vortex () formed in a flow passing over the foil. The nest shape may be formed in part by a progressive fillet () between the suction side of the foil and the suction side of the wind turbine blade. The nest shape may be formed in part by a distal portion (C-D) of the foil curling over the suction side of the foil. A trailing edge fillet (E-G) may form a ridge (E-G), which may extend the nest shape aft of the trailing edge of the foil. A nest shape axis (E-G) may diverge from an incidence angle (φ) of the foil. 1. A vortex generator for a wind turbine blade comprising:a fluid foil comprising a pressure side and a suction side extending from a larger aerodynamic surface of the blade; anda vortex nest formed along at least a portion of the suction side of the fluid foil.2. The vortex generator of claim 1 , wherein at least said portion of the suction side of the fluid foil comprises a conic surface with a vertex proximate a front end of the suction side of the fluid foil.3. The vortex generator of claim 1 , wherein the vortex nest comprises a progressive fillet between the suction side of the fluid foil and the larger aerodynamic surface claim 1 , wherein a radius of the progressive fillet progressively increases from a front end to a back end of the fluid foil.4. The vortex generator of claim 3 , wherein the vortex nest comprises a distal portion of the fluid foil curling over the suction side thereof and forming a suction side span-wise concavity from the progressive fillet to the distal portion.5. The vortex generator of claim 4 , wherein the concavity is continuous from the fillet to the distal portion.6. The vortex generator of claim 4 , further comprising a second fluid foil comprising a mirror image of the fluid foil ...

Arrangement to reduce noise of a wind turbine rotor blade

An arrangement to reduce noise of a wind turbine rotor blade is provided, including a wind turbine rotor blade and a noise reduction device. The noise reduction device includes a serrated extension for at least reducing noise generated from the wind turbine rotor blade, the noise reduction device attached to the trailing edge section. The serrated extension has a number of first and second teeth. The designs of the first and second teeth are differently compared to each other such that suction side noise and pressure side noise are both reduced by the teeth of the serrated extension. Advantageously, the first teeth and the second teeth are arranged in an alternating, periodic pattern and differ from each other by an angle of inclination with regard to a trailing edge streamline and or by its planform shape. Furthermore, a method to reduce noise of a wind turbine rotor blade is provided.

METHOD OF MANUFACTURING A WIND TURBINE BLADE HAVING PREDESIGNED SEGMENT

A blade for a rotor of a wind turbine is manufactured with a root region with a substantially circular or elliptical profile closest to the hub, an airfoil region with a lift generating profile furthest away from the hub and a transition region having a profile gradually changing the root region to the airfoil region. A first blade design is used for the first base part on a first longitudinal section of an airfoil region of a second blade, so that an induction factor of the first base part on the second blade deviates from a target induction factor. The first longitudinal section of the second blade is provided with flow altering devices so as to adjust the aerodynamic properties of the first longitudinal segment to substantially meet the target induction factor at the design point on the second blade.

Methods for Joining Blade Components of Rotor Blades Using Printed Grid Structures

Methods for joining a first blade component and a second blade component of a rotor blade together includes printing and depositing, via a computer numeric control (CNC) device, at least one three-dimensional (3-D) grid structure at a first joint area of the rotor blade. The first joint area contains the first blade component interfacing with the second blade component. The method also includes providing an adhesive at the first joint area to at least partially fill the grid structure. Further, the method includes securing the first blade component and the second blade component together at the first joint area via the adhesive. 1. A method for joining a first blade component and a second blade component of a rotor blade together , the method comprising:printing and depositing, via a computer numeric control (CNC) device, at least one three-dimensional (3-D) grid structure at a first joint area of the rotor blade, the first joint area containing the first blade component interfacing with the second blade component;providing an adhesive at the first joint area and contacting at least a portion of the grid structure; and,securing the first blade component and the second blade component together at the first joint area via the adhesive.2. The method of claim 1 , wherein the adhesive at least partially fills the grid structure.3. The method of claim 1 , wherein the first and second blade components further comprise at least one of first and second outer surfaces of the rotor blade claim 1 , a shear web claim 1 , or a spar cap.4. The method of claim 3 , further comprising:placing the first outer surface into a mold of the rotor blade;printing and depositing, via the CNC device, the at least one grid structure onto an inner surface of the first outer surface at the first joint area, the grid structure bonding to the first outer surface as the grid structure is being deposited;placing the second outer surface atop the first outer surface; and,securing the first and second ...

WIND TURBINE BLADE WITH NARROW SHOULDER AND RELATIVELY THICK AIRFOIL PROFILES

Rotor blade for a wind power plant

Die Erfindung betrifft eine Windenergieanlage mit einem Rotor, welcher bevorzugt mehr als ein Rotorblatt aufweist. Aufgabe der vorliegenden Erfindung ist es, ein Rotorblatt mit einem Rotorblattprofil bzw. eine Windenergieanlage anzugeben, welches bzw. welche eine bessere Leistungsfähigkeit als bisher aufweist. Windenergieanlagemit einem Rotor, welcher bevorzugt mehr als ein Rotorblatt aufweist, wobei das Rotorblatt eine der aerodynamischen Optimalform mehr oder weniger angenäherte Trapezform aufweist und das Rotorblatt im Bereich der Rotorblattwurzel seine größte Breite aufweist und die der Gondel der Windenergieanlage zugewandte Kante der Rotorblattwurzel so ausgebildet ist, dass der Verlauf der Kante im Wesentlichen der äußeren Kontur der Gondel (in Längsrichtung) angepasst ist.

Wind power plant

Die Erfindung betrifft eine Windenergieanlage. Aufgabe der vorliegenden Erfindung ist es, ein Rotorblatt mit einem Rotorblattprofil bzw. eine Windenergieanlage anzugeben, welches bzw. welche eine bessere Leistungsfähigkeit als bisher aufweist. Windenergieanlage, dadurch gekennzeichnet, dass die Windenergieanlage wenigstens ein Rotorblatt aufweist, welches durch eine Saugseite und eine Druckseite gekennzeichnet ist, wobei das Verhältnis der Länge der Saugseite zur Länge der Druckseite kleiner ist als ein Wert von 1,2, bevorzugt kleiner ist als 1,1 und insbesondere in einem Wertebereich zwischen 1 und 1,03 liegt.

ЛОПАСТЬ РОТОРА ВЕТРОВОЙ ЭНЕРГЕТИЧЕСКОЙ УСТАНОВКИ

... 1. Лопасть (1) ротора ветровой энергетической установки, имеющая:- комель (4) лопасти ротора для присоединения лопасти (1) ротора к ступице ротора и- расположенную на противоположной комлю (4) лопасти ротора стороне вершину лопасти ротора,при этом относительная толщина (2) профиля, которая определена как отношение толщины (2) профиля к хорде (3) профиля, имеет локальный максимум в средней области (6) между комлем лопасти ротора и вершиной лопасти ротора.2. Лопасть (1) ротора по п. 1, отличающаяся тем, что относительная толщина (2) профиля локального максимума составляет от 35% до 50%, в частности от 40% до 45%.3. Лопасть (1) ротора по одному из пп. 1 или 2, отличающаяся тем, что лопасть (1) ротора в области локального минимума имеет хорду профиля, равную от 1500 мм до 3500 мм, в частности примерно 2000 мм.4. Лопасть (1) ротора по п. 1, отличающаяся тем, что- лопасть (1) ротора состоит из первого и второго участка лопасти ротора, причем- первый участок лопасти ротора содержит комель (4) ...

ROTORBLATTAUSBILDUNG FUER SCHNELLAUFENDE ROTOREN

Strömungsprofil aus geometrischen Grundfiguren mit drehbeweglichem Segment

Fluiddynamisch wirksames Strömungsprofil aus geometrischen Grundfiguren dadurch gekennzeichnet, dass die Kontur des Profils durch die geometrischen Elemente Ellipse, Kreis und Tangente beschrieben wird.

Rotorblatt

Rotorblatt für eine Windenergieanlage mit einer Druckseite und einer Saugseite, wobei auf der Saugseite ein im Wesentlichen gleichbleibendes, flächendeckendes elektrostatisches Feld ausgebildet ist.

Extension portion for wind turbine blade

A wind turbine rotor blade extension portion 30 comprises a permanent framework, having one or more chord-wise members 190, and a substantially span-wise member 200. A skin/membrane 220 is located over the framework to thereby generate a streamlined surface comprising first and second portions 120, 130 which are spaced apart at a proximal region of the extension and connected to one another at a distal region. The extension portion is configured to transmit aerodynamic loads from the skin/membrane, along the chord-wise members to a rotor blade 10 to which the extension portion may be connected in use by means of bonding, bolts, or a span-wise element on the extension portion slidably located in a recess on the blade.

WIND TURBINE BLADE AND ROTOR INCORPORATING SAME

Rigid polymeric blade for a wind turbine and method and apparatus to manufacture same

Numerical simulation method based on influence of PTFE membrane on aerodynamic characteristics of fan blade

Disclosed is a numerical simulation method based on the influence of a PTFE membrane on the aerodynamic characteristics of a fan blade, which method relates to the technical field of polymer composite materials. The method comprises: selecting a wind turbine generator, a blade airfoil, and a composite membrane based on a PTFE nano-function; setting a numerical simulation calculation grid and a calculation area of a wind energy capture area; determining main calculation parameters and a Reynolds number of aerodynamic characteristic calculation; establishing a geometric model in which the boundary of the airfoil extends by 0.26 mm (the thickness of the membrane) in a normal direction, so as to obtain a new calculation geometry; performing calculation by using a fluid mechanics calculation method and a finite volume method; and obtaining an influence numerical simulation calculation result. On the basis of aerodynamics and structural dynamics, influence numerical simulation calculation is ...

MODIFIED WIND TURBINE BLADE

SHEET PROFILE FOR WINDTURBINE

SHOVEL FOR A ROTOR OF A WINDTURBINE, WHICH IS WITH A BARRIER PRODUCTION MEANS MISTAKE

Rotorblatt für eine Windkraftanlage

Die Erfindung betrifft ein Rotorblatt (3) für eine Windkraftanlage (1), wobei das Rotorblatt (3) eine Oberfläche aufweist, welche bei einer bestimmungsgemäßen Verwendung des Rotorblattes (3) eine Luftströmung umlenkt, um eine Energie der Luftströmung in eine Bewegungsenergie des Rotorblattes (3) umzuwandeln. Um einen optimierten Betrieb einer Windkraftanlage (1), welche ein solches Rotorblatt (3) aufweist, zu ermöglichen, ist erfindungsgemäß vorgesehen, dass eine Größe der Oberfläche des Rotorblattes (3) variierbar ist.

WIND TURBINE BLADE

Blade of a wind turbine

Wind turbine blade with variable trailing edge

The present invention relates to a wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft. The blade may comprise a profiled contour comprising a pressure side and a suction side as well as a leading edge and a trailing edge, a chord extending between the leading edge and the trailing edge, and the profiled contour generating a lift when being impacted by an incident airflow. In a cross section of the wind turbine blade perpendicular to a lengthwise direction of the wind turbine blade, a suction side point is defined on the suction side at the trailing edge of the blade, and a pressure side point is defined on the pressure side at the trailing edge of the blade. The suction side point is movable in relation to the pressure side point, and the blade is further provided with a displacement device configured to displace the pressure side point and the suction side point so that a distance between the suction side point and the pressure side point can be varied. The present invention further relates to a wind turbine including such a wind turbine blade and to a method of operating a wind turbine including such a wind turbine blade.

Load mitigation device for wind turbine blades

The present invention includes a rotor blade ( 20 ) having a blade body ( 30 ) with a leading edge ( 26 ) and a trailing edge ( 28 ) and opposed first and second surfaces ( 34, 36 ) extending there between defining an airfoil shape ( 32 ) in cross-section. A passageway ( 42 ) extends through the blade body ( 30 ) between the first and second surfaces ( 34, 36 ). A flexible member ( 60 ) is sealed over one end ( 50 ) of the passageway ( 42 ). Advantageously, the flexible member ( 60 ) is passively responsive to changes in a differential pressure between the first and second surfaces ( 34, 36 ) to move between a deactivated position ( 62 ) and an activated position ( 64 ) where the flexible member ( 60 ) extends away from the airfoil shape ( 32 ) to function as a load mitigation device ( 40 ) for the wind turbine rotor blade ( 20 ).

Wind turbine rotor blade with passively modified trailing edge component

A wind turbine rotor blade includes a root portion and an airfoil portion extending from the root portion and defined by a leading edge and a trailing edge. The airfoil portion further includes a main foil section and a trailing edge section that is pivotally connected to the main foil section along a span-wise extending hinge line. A passive torsion element is coupled between the main foil section and the trailing edge section. The torsion element is biased to a neutral position wherein the trailing edge section is pivoted chord-wise to a low wind speed position relative to the main foil section. The trailing edge section is self-actuating from the low wind speed position to an increased wind speed position relative to the main foil section against as a function of the biasing force of the torsion element and wind speed over the airfoil section.

Turbine blades and systems with forward blowing slots

A blade for use in a wind turbine comprises a pressure side and suction side meeting at a trailing edge and leading edge. The pressure side and suction side provide lift to the turbine blade upon the flow of air from the leading edge to the trailing edge and over the pressure side and suction side. The blade includes one or more openings at the suction side, in some cases between the leading edge and the trailing edge. The one or more openings are configured to provide a pressurized fluid towards the leading edge of the blade, in some cases at an angle between about 0° and 70° with respect to an axis oriented from a centerline of the blade toward the leading edge.

Wind turbine blade, wind turbine generator equipped with wind turbine blade and method of designing wind turbine blade

It is intended to provide a wind turbine blade with superior aerodynamic characteristics and rigidity, a wind turbine generator equipped with the wind turbine blade, and a method of designing the wind turbine blade. The wind turbine blade 1 is provided with a blade tip part 2, a blade root part 4 connected to a hub 112, and an airfoil part 6 disposed between the blade tip part 2 and the blade root part 4. The airfoil part 6 includes a flatback airfoil 10 with a blunt trailing edge 8 at least in an area in a longitudinal direction of the wind turbine blade 1 where a blade thickness ratio X is 40% to 50%. X indicates a ratio of a maximum thickness t MAX to a chord length L C . In the area where the blade thickness ratio X is 40% to 50%, the flatback airfoil has a trailing edge thickness ratio Y which is 5% to Y H %, Y indicating a ratio of a trailing edge thickness t TE to the maximum thickness t MAX and Y H has a relationship of Y H =1.5X−30 with the blade thickness ratio X.

WIND TURBINE BLADE FOR A ROTOR OF A WIND TURBINE

A wind turbine blade comprises a profiled contour having a pressure side and a suction side, a leading edge and a trailing edge with a chord extending between the leading edge and the trailing edge. The profiled contour generating a lift when being impacted by an incident airflow is formed by a hollow shell body. The hollow shell body is formed by at least a first shell body part and a second shell body part, which are mutually connected at least at the trailing edge and/or the leading edge. An edge stiffener is arranged within the hollow shell body at a first part of the edges, a first surface part of the edge stiffener being connected to an inner side of the first shell body part, and a second surface part of the edge stiffener being connected to an inner side of the second shell body part. 1. A wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft , the rotor comprising a hub from which the blade extends substantially in a radial direction when mounted to the hub , wherein the blade comprises: a profiled contour comprising a pressure side and a suction side , a leading edge and a trailing edge with a chord extending between the leading edge and the trailing edge , the profiled contour generating a lift when being impacted by an incident airflow , where-in said profiled contour is formed by a hollow shell body , wherein the hollow shell body is formed by at least a first shell body part and a second shell body part , which are mutually connected at least at the trailing edge and/or the leading edge , characterised in that an elongated , longitudinally extending and prefabricated edge stiffener is arranged within the hollow shell body at a first part of the edges , wherein a first longitudinal surface part of the edge stiffener is connected to an inner side of the first shell body part , and a second longitudinal surface part of the edge stiffener is connected to an inner side of the second shell body part , and that the ...

Arrangement to reduce noise originated by a wind turbine blade

An arrangement for reducing noise which is generated by a wind turbine blade is provided. The wind turbine blade has a first panel and a second panel. The first and the second panel are arranged at a trailing edge of the wind turbine blade, wherein the first panel is adjacent to the second panel. The first panel includes a first transition zone and the second panel includes a second transition zone. The first transition zone and the second transition zone are engaged in a way that whistle tones produced by a gap of the wind turbine blade, the gap being located between the first panel and the second panel, is reduced or even avoided.

WIND TURBINE ROTOR BLADE WITH A PROFILE WITH A THICK TRAILING EDGE

A wind turbine rotor blade having a longitudinal axis, a blade root; a blade tip, a pressure side, a suction side and an aerodynamic profile which, in a longitudinal section of the rotor blade, has a profile chord and a thick trailing edge. The rotor blade includes a multiplicity of flow deflection elements which are arranged on the thick trailing edge and have respective inflow surfaces which are shaped and arranged such that a radial flow running in the direction from the blade root toward the blade tip is diverted by the inflow surface in the direction of the profile chord. 1. A wind turbine rotor blade defining a longitudinal axis , the wind turbine rotor blade comprising:a rotor blade body having a blade root, a blade tip, a pressure side, a suction side, a longitudinal section, and an aerodynamic profile;said aeorodynamic profile having a profile chord and a thick trailing edge in said longitudinal section of the rotor blade;a plurality of flow deflection elements arranged on said thick trailing edge of said aerodynamic profile; and,each of said flow deflection elements having an inflow surface arranged and configured to divert a radial flow flowing from said blade root toward said blade tip in the direction of said profile chord.2. The wind turbine rotor blade of claim 1 , wherein each of said inflow surfaces are concavely curved.3. The wind turbine rotor blade of claim 1 , wherein:said chick profile trailing edge has a height (H); and,said flow deflection elements extend over the entire height (H) of said thick profile trailing edge.4. The wind turbine rotor blade of claim 1 , wherein:each one of said flow deflection elements has a first side directed toward said blade tip and disposed opposite the inflow surface corresponding thereto; and,said first side of each of said flew deflection elements has a planar first surface arranged in the direction of said profile chord.5. The wind turbine rotor blade of claim 1 , wherein:said thick profile trailing edge ...

WIND TURBINE ROTOR BLADE

Disclosed is a wind turbine rotor blade includes a root portion, an airfoil portion, a thickened zone extending outward from an inner hub end of the blade into the airfoil portion of the blade; and an airflow correction arrangement arranged on a pressure side of the blade over at least a portion of the thickened zone. The airflow correction arrangement includes a spoiler to increase blade lift and a vortex generator arranged between a leading edge and the trailing edge and realized to maintain an attached airflow between the vortex generator and the spoiler. A wind turbine with at least one such rotor blade is disclosed. An airflow correction arrangement for correcting the airflow over the pressure side of a wind turbine rotor blade for a region of the blade having a thickened zone is further disclosed. 1. A wind turbine rotor blade comprising:a root portion;an airfoil portion;a thickened zone in which the blade has a thickness coefficient of at least 0.45, the thickened zone extends outward from the root portion of the blade into the airfoil portion of the blade; andan airflow correction arrangement arranged on a pressure side of the blade over at least a portion of the thickened zone, the airflow correction arrangement comprises a spoiler realized to increase blade lift; and a vortex generator arranged between a leading edge and the trailing edge and realized to maintain an attached airflow between the vortex generator and the spoiler.2. The wind turbine rotor blade according to claim 1 ,wherein the thickness coefficient comprises at least 0.6 in the airfoil portion of the blade.3. The wind turbine rotor blade according to claim 1 , comprisinga transition portion in the thickened zone between the root portion and the airfoil portion, the transition portion extends up to at least 30% of the blade length.4. The wind turbine rotor blade according to claim 1 ,wherein the vortex generator is arranged to extend along the length of the thickened zone.5. The wind turbine ...

Aerodynamic structure

Provided is an aerodynamic structure for mounting to a surface of a wind turbine rotor blade, which aerodynamic structure includes a plurality of rectangular comb elements and/or a plurality of angular comb elements, wherein a comb element includes comb teeth arranged in a comb plane that subtends an angle to the surface of the rotor blade. The embodiments further describe a wind turbine rotor blade including such an aerodynamic structure.

Blade Flow Deflector

An airfoil blade assembly including a blade which includes a lift generating section with a first profiled body defined between a pressure surface and a suction surface. The first profiled body extends from a first leading edge to a first trailing edge with a first chord extending form the first leading edge to the first trailing edge and being perpendicular to the radial direction. At least one flow deflector extends along either the pressure surface or the suction surface within the lift generating section of the blade. The at least one flow deflector defines a second profiled body extending between a second leading edge and a second trailing edge with a second chord extending between the second leading edge and the second trailing edge. The second profiled body defines an outer surface facing away from respective pressure surface or suction surface along which the flow deflector extends. 1. An airfoil blade assembly comprising:a blade extending in a radial direction from a root towards a tip, the blade including a lift generating section with a first profiled body defined between a pressure surface and a suction surface, the first profiled body extending from a first leading edge to a first trailing edge with a first chord extending form the first leading edge to the first trailing edge and being perpendicular to the radial direction;a plurality of flow deflectors extending along either the pressure surface or the suction surface within the lift generating section of the blade, the plurality of flow deflectors defining a second profiled body extending between a second leading edge and a second trailing edge with a second chord extending between the second leading edge and the second trailing edge, the second profiled body defining an outer surface facing away from respective pressure surface or suction surface along which the plurality of flow deflectors extend;wherein the plurality of flow deflectors are positioned along a length of the blade so that a radial ...

CORRECTING MEASURED WIND CHARACTERISTIC OF A WIND TURBINE

Provided is a method of correcting a measurement value of least one wind characteristic, in particular wind speed and/or wind direction, related to a wind turbine having a rotor with plural rotor blades at least one having an adaptable flow regulating device installed, the method including: measuring a value of the wind characteristic; obtaining state information of the adaptable flow regulating device; and determining a corrected value of the wind characteristic based on the measured value of the wind characteristic and the state information of the adaptable flow regulating device. 1. A method of correcting a measurement value of least one wind characteristic , related to a wind turbine having a rotor with plural rotor blades at least one having an adaptable flow regulating device installed , the method comprising:measuring a value of the wind characteristic;obtaining state information of the adaptable flow regulating device; anddetermining a corrected value of the wind characteristic based on the measured value of the wind characteristic and the state information of the adaptable flow regulating device.3. The method according to claim 1 , wherein determining the corrected value of the wind characteristic includes:determining a correction value of the wind characteristic based on the state information of the adaptable flow regulating device; andadding the correction value and the measured value of the wind characteristic to obtain the corrected value of the wind characteristic.4. The method according to claim 1 , wherein the correction value is obtained using a look up table and/or neural network and/or a correction function claim 1 ,which is based on measurements and/or determinations and/or estimations, at different states of the adaptable flow regulating device, of the wind characteristic and at least one of the further values.5. The method according to claim 1 , wherein the wind characteristic includes wind speed claim 1 , wherein a value of estimated wind ...

ESTIMATING WIND SPEED

Provided is a method of estimating a value of wind speed a wind turbine is subjected to, the wind turbine having a rotor with rotor blades at least one having an adaptable flow regulating device installed, the method including: obtaining values for power output of the wind turbine, rotor speed of the rotor, and pitch angle of the rotor blades; obtaining state information of the adaptable flow regulating device; and estimating the value of the wind speed based on the values for power output, rotor speed, pitch angle and the state information of the adaptable flow regulating device. 1. A method of estimating a value of wind speed a wind turbine is subjected to , the wind turbine having a rotor with rotor blades at least one having an adaptable flow regulating device installed , the method comprising:obtaining values for power output of the wind turbine, rotor speed of the rotor, and pitch angle of the rotor blades;obtaining state information of the adaptable flow regulating device; andestimating the value of the wind speed based on the values for power output, rotor speed, pitch angle and the state information of the adaptable flow regulating device.2. The method according to claim 1 , wherein the state information of the adaptable flow regulating device comprises information regarding an activation level of the adaptable flow regulating device.3. The method according to claim 1 , wherein the adaptable flow regulating device or at least one portion of several adaptable flow regulating portions is adjustable to be in at least two states claim 1 , representing different activation levels claim 1 , the state information being indicative of the respective activation level.4. The method according to claim 1 , wherein the adaptable flow regulating device comprises several adaptable flow regulating portions installed along the rotor blade claim 1 , wherein the state information of the adaptable flow regulating device comprises state information of at least one claim 1 , ...

Propeller Blade-Tip Flow Isolator

A propeller blade-tip flow isolator that can be used on a propeller, rotor, or wind turbine is provided. The propeller blade-tip flow isolator integrates with the blade at the outer radius and shields the propeller blade-tip boundary layer, reducing blade-tip vortices. A twist along the blade-tip chord further reduces or eliminates the blade-tip vortices that inherently occurs on the exposed blade tips during normal operations. Efficiency and performance are improved while noise and acoustic levels are reduced. 1. A propeller blade-tip flow isolator comprising;a physical barrier isolating a high-pressure boundary layer from a fluid outside of a blade tip, the physical barrier isolating a low-pressure boundary layer from the fluid outside of the blade tip, providing means for reducing blade-tip vortices, further providing means for increasing axial fluid-flow components.2. Said propeller blade-tip flow isolator of claim 1 , wherein said propeller blade-tip flow isolator is twisted along a blade tip chord in an opposite direction to a vortex generated by exposed blade tips claim 1 , providing means to induce a vortex in an opposite direction than a naturally occurring vortex generated by exposed blade lips claim 1 , whereby blade-tip vortices and non-axial fluid flow components are further reduced.3. A method for reducing propeller bladc-tip vortices comprising;a propeller blade-tip flow isolator derived from a propeller blade-tip end area and a propeller blade-tip boundary layer, twisted along a propeller blade-tip chord in an opposite direction of the propeller blade-tip vortices generated by exposed propeller blade tips, providing means to induce a vortex in the opposite direction than the naturally occurring vortex generated by exposed propeller blade tips, whereby propeller blade-tip vortices, non-axial fluid flow components, and noise are reduced. This application claims priority to U.S. provisional patent application 62/238,135, filed 7 Oct. 2015.Propellers are ...

METHOD FOR DETERMINING ARRANGEMENT POSITION OF VORTEX GENERATOR ON WIND TURBINE BLADE, METHOD FOR PRODUCING WIND TURBINE BLADE ASSEMBLY, AND WIND TURBINE BLADE ASSEMBLY

A method for determining an arrangement position of a vortex generator on a wind turbine blade includes: determining, for a first region of a mounting range of the vortex generator in a blade spanwise direction, an arrangement position of the vortex generator to be an angular position offset by a predetermined angle toward a trailing edge of the wind turbine blade with reference to an inflow angle of wind to the wind turbine blade; and determining, for a second region closer to a blade tip, the arrangement position of the vortex generator to be a position between a separation position of a flow on a surface of the wind turbine blade under a rated wind speed condition and a transition position of the flow on the surface of the wind turbine blade under a variable speed operation condition of a wind turbine including the wind turbine blade. 1. A method for determining an arrangement position of a vortex generator on a wind turbine blade , the method comprising:a step of determining, for a first region of a mounting range of the vortex generator in a blade spanwise direction, an arrangement position of the vortex generator to be an angular position offset by a predetermined angle toward a trailing edge of the wind turbine blade with reference to an inflow angle of wind to the wind turbine blade; anda step of determining, for a second region of the mounting range closer to a blade tip than the first region, the arrangement position of the vortex generator to be a position between a separation position of a flow on a surface of the wind turbine blade under a rated wind speed condition and a transition position of the flow on the surface of the wind turbine blade under a variable speed operation condition of a wind turbine including the wind turbine blade.2. The method for determining an arrangement position of a vortex generator on a wind turbine blade according to claim 1 , further comprising:a step of obtaining the separation position under the rated wind speed ...

WIND TURBINE BLADE HAVING A SHAPED STALL FENCE OR FLOW DIVERTER

A wind turbine blade is described wherein at least one stall fence is provided on the blade surface, where the stall fence is arranged such that it extends at an angle to the chord of the blade. The stall fence acts to re-direct airflow over the blade, to improve wind turbine performance. The stall fence may be a provided towards the blade root end, acting to divert airflow towards the root end of the blade to prevent separation of attached airflow. Additionally or alternatively, the stall fence may be arranged as a flow diverter provided towards the blade tip end, to increase airflow in the tip region for increased performance and/or to disrupt the formation of tip vortices. 1. A wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft , said rotor comprising a hub , from which the blade extends substantially in a radial direction when mounted to the hub , the blade having a longitudinal direction with a tip end and a root end and a transverse direction , the blade further comprising:a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord having a chord length extending therebetween, the chord provided on a chordal plane arranged along said transverse direction, the profiled contour, when being impacted by an incident air-flow, generating a lift,the wind turbine further comprising at least one stall fence provided on a surface of said wind turbine blade, at least a section of said at least one stall fence extending along the transverse direction of said blade at an angle to said chordal plane of between +/−15-60 degrees, said at least one stall fence acting to direct attached flow over the profiled contour of said blade, wherein said at least one stall fence extends from a first end adjacent said leading edge to a second end adjacent said trailing edge.2. The wind turbine blade of claim 1 , wherein the height of said at least one stall fence above the surface ...

Wind turbine blade with multiple inner blade profiles

A wind turbine blade (6) having a span-wise direction between an inner tip region (6a) and an outer tip region (6b), and a chord-wise direction (AA) perpendicular to the span-wise direction is disclosed. The wind turbine blade (6) comprises a hinge (7), an outer blade part (8) and an inner blade part (9). The hinge (7) is arranged to connect the wind turbine blade (6) to a blade carrying structure (5) of a wind turbine (1). The hinge (7) is arranged at a distance from the inner tip region (6a) and at a distance from the outer tip region (6b). The outer blade part (8) is arranged between the hinge (7) and the outer tip region (6b) and the inner blade part (9) is arranged between the hinge (7) and the inner tip region (6a). The inner blade part (9) comprises at least two inner blade portions (20) each having a profile and wherein the inner blade portions (20) are arranged such that the profiles are spaced from each other in the chord-wise direction (AA).

AIRFOIL WITH A VORTEX GENERATOR PAIR

A wind turbine includes a blade having a leading edge, a trailing edge, and opposing first and second surfaces extending between the edges. A vortex generator pair includes a base attached to the first surface and first and second spaced apart fins extending outwardly from opposing portions of the base. The fins each have a leading edge, a trailing edge, a suction side and a pressure side. Each of the suction sides have a trailing half and a leading half. 1. A wind turbine comprising:a blade having a leading edge, a trailing edge, and opposing first and second surfaces extending between the edges; anda vortex generator pair including:a base attached to the first surface, andfirst and second spaced apart fins extending outwardly from opposing portions of the base, the fins each have a leading edge, a trailing edge, a suction side and a pressure side, each of the suction sides having a trailing half and a leading half, wherein a surface area of the trailing half is less than 200 percent of a surface area of the leading half2. The wind turbine of claim 1 , wherein the first and second fins are positioned such the first and second fins are not touching each other to define an air gap between the first and second fins and extending completely over the base.3. The wind turbine of claim 1 , wherein the surface area of the trailing half is greater than the surface area of the leading half.4. The wind turbine of claim 1 , wherein the fins are angled relative to each other such that a distance between the leading edges of the fins is greater than a distance measured between the trailing edges of the fins.5. The wind turbine of claim 1 , wherein the spaced apart fins define an area in between and the base covers less than 90% of this area.61. The wind turbine of claim 1 , wherein each of the fins are cambered inwardly by at least percent of a chord of the fin.7. The wind turbine of claim 1 , wherein the vortex generator pair is located on the blade at a radial position that is ...

WIND TURBINE BLADE WITH TRAILING EDGE TAB

A wind turbine blade (B-C) with a rounded trailing edge (A-E) and an elongated tab (A-J) extending from the pressure side (PS) within the aft 10% of the local chord (C) and generally parallel to the trailing edge to increase lift. The tab may have a height (H) that is greatest on the radially inboard end to maximize lift, and lower on the outboard end to minimize drag. It may have a base with a length of at least 60% of its height. 1. A wind turbine blade comprising:a cylindrical root portion;a maximum chord position comprising a lifting airfoil cross sectional profile;a transition region comprising a radial transition length between the root portion and the maximum chord position;a trailing edge that is rounded in cross section from the root portion to at least one transition length radially outward of the maximum chord position; andan elongated tab extending from a pressure side of the wind turbine blade over at least a portion thereof from the maximum chord position to said one transition length outward of the maximum chord position;wherein the tab is located within an aft 10% of the chord length of the blade, andwherein the tab comprises a height normal to the pressure side, and the height gradually changes from 3-6% of local chord length at an inboard end of the tab to 0.5%-2% of local chord length at an outboard end of the tab.2. (canceled)3. The wind turbine blade of claim 1 , wherein the tab further extends along at least a portion of the transition region claim 1 , and comprises a height normal to the pressure side claim 1 , wherein the height gradually changes from 5-12% of local chord length at an inboard end of the tab to 0.5%-2% of local chord length at an outboard end of the tab.4. The wind turbine blade of claim 1 , wherein the tab further extends along at least a portion of the transition region claim 1 , and comprises a height normal to the pressure side claim 1 , wherein the height is 5-12% of local chord length at an inboard end of the tab claim 1 ...

ROTOR BLADE OF A WIND TURBINE AND A WIND TURBINE

A rotor blade having a suction side and a pressure side for a wind power installation, comprising: a rotor blade root of a hub region for the attachment of the rotor blade to a rotor hub, and a rotor blade tip arranged toward that side of a tip region which is averted from the rotor blade root. In the region of the hub region, the rotor blade has, at least in part, a thickness profile which has a thorn-like extension at its trailing edge, wherein, in the region of the hub region, the thickness profile has, at least in part, a first thorn-like extension at the trailing edge at the suction side, and a second thorn-like extension at the trailing edge at the pressure side, and, in the region of the hub region, the thickness profile has, at least in part, a flow stabilizer and/or a vortex generator on the suction and/or pressure side. 1. A rotor blade for a wind power installation , comprising:a suction side;a pressure side;a hub region;a tip region;a rotor blade root at the hub region, the rotor blade root being configured to attach the rotor blade to a rotor hub; anda rotor blade tip at the tip region;wherein in a region of the hub region, a trailing edge of the rotor blade has, at least in part, a thickness profile having a thorn-like extension, a first thorn-like extension at the trailing edge at the suction side, and', 'a second thorn-like extension at the trailing edge at the pressure side,, 'wherein the thorn-like extension includes at least one ofwherein in the region of the hub region, the thickness profile has, at least in part, at least one of: a flow stabilizer or a vortex generator, on at least one of: the suction side or pressure side.2. The rotor blade as claimed in claim 1 , wherein claim 1 , in the region of the hub region claim 1 , the thickness profile has claim 1 , at least in part claim 1 , a relative thickness of greater than 40%.3. The rotor blade as claimed in claim 1 , wherein claim 1 , in the hub region claim 1 , the trailing edge is a flat or ...

Wind turbine with an offset suction side

Wind turbine having a wind turbine tower, a nacelle provided on the wind turbine tower, a rotor hub rotatably mounted to the nacelle, and one or more wind turbine blades having a root end to be mounted to the rotor hub, a tip end, and pressure and suction sides connected to each other via a leading edge and a trailing edge. The wind turbine blade has a plurality of cross-sectional profiles arranged according to the surface of the suction side so that the surface of the suction side forms a line having a predetermined curvature which curves towards the pressure side of the wind turbine blade and/or forms an approximately straight line along at least part of the relative length. The line crosses each cross-sectional profile in that point on the pressure side where the maximum relative thickness of that profile perpendicular relative to its chord line is measured.

Structures and methods of manufacturing structures using biological based materials

A structure for a turbine, the structure comprising a body having a multi-layer construction including an interior layer with substantially uniform concentrations throughout of facultative anaerobic organisms (FAO) that have gene sets capable of producing the enzyme urease and/or the proteins purloin, lustre A and perlustrin, along with glucose, and non-uniform concentrations throughout of a structural composition, the structural composition including a chitin-based component with silk fibronectin and water; an exterior layer of urea, water, calcium ions and facultative anaerobic organisms (FAOs) including urease, aragonite; and a binding layer of conchiolin protein intermediate the interior layer and the exterior layer. The facultative anaeorobic organisms (FAOs) are organisms classified in one of the Saccharomyces, Escherichia and Bacillus genuses.

VORTEX GENERATORS FOR WIND TURBINE ROTOR BLADES

The present disclosure is directed to a vortex generator configured for mounting to either of a suction side or a pressure side of a rotor blade. The vortex generator includes a base portion having a contour in an uninstalled state that substantially aligns with or conforms to a contour of a plurality of locations of either on the suction side or the pressure side of the rotor blade. Further, the vortex generator includes a protrusion member extending upwardly from the base portion. The protrusion member includes a plurality of tines separated by at least one slit. Moreover, the base portion and the protrusion member are constructed of a rigid material. In addition, the vortex generator includes a flexible coating material configured at least partially around the base portion and/or within or around the at least one slit. 1. A vortex generator configured for mounting to either of a suction side or a pressure side of a rotor blade , the vortex generator comprising;a base portion comprising a curvature in an uninstalled state that substantially aligns with or conforms to a contour of a plurality of locations on either of the suction side or the pressure side of the rotor blade;a protrusion member extending upwardly from the base portion, the protrusion member comprising a plurality of tines separated by at least one slit, the base portion and the protrusion member being constructed of a rigid material; and,a flexible coating material configured at least partially around the base portion and/or within or around the at least one slit.2. The vortex generator of claim 1 , wherein the flexible coating material completely surrounds the base portion and the protrusion member.3. The vortex generator of claim 1 , wherein the flexible coating material comprises a hardness of from about 30 Shore A to about 105 Shore A.4. The vortex generator of claim 1 , wherein the flexible coating material comprises at least one of a thermoplastic material claim 1 , a thermoset material claim ...

WIND TURBINE BLADE WITH TRIPPING DEVICE AND METHOD THEREOF

A wind turbine and a method of reducing extreme loads and fatigue loads on a wind turbine by using a passively activated tripping device arranged on the pressure side of the wind turbine blade. The tripping device is configured to interrupt the passing airflow, when activated, and transform the airflow into a turbulent airflow. The tripping device is positioned close to the leading edge, wherein its dimensions are optimized so that it reduces the maximum lift coefficient as well as increases the minimum lift coefficient which in turn reduces the range of the lift coefficient. The tripping device is activated at both negative and positive angle-of-attacks outside the normal operating range. 1. A wind turbine comprising:a wind turbine tower,a nacelle arranged on top of the wind turbine tower,a rotatable rotor with at least two wind turbine blades connected to the nacelle,wherein each of the at least two wind turbine blades comprises a tip end, a blade root and an aerodynamic profile,wherein the aerodynamic profile defines a leading edge, a trailing edge, a first side surface which defines a pressure side, and a second side surface which defines a suction side,wherein a chord extends from the leading edge to the trailing edge and has a chord length of 100%,wherein at least one first tripping device is arranged on the pressure side on at least one of the wind turbine blades, the at least one first tripping device is placed at a predetermined position relative to the leading edge, and wherein the at least one first tripping device is configured to passively reduce a maximum lift coefficient when said at least one of the wind turbine blades has a positive AoA outside a normal operating AoA range and to passively increase a minimum lift coefficient when said at least one of the wind turbine blades has a negative AoA outside the normal operating AoA range.2. The wind turbine according to claim 1 , wherein said at least one first tripping device is further configured to ...

AIRFLOW MODIFYING ELEMENT FOR SUPPRESSING AIRFLOW NOISE

A rotor blade assembly is provided having an airflow modifying element for suppressing airflow noise caused by a drain hole. The rotor blade assembly includes at least one rotor blade including a body shell extending between a blade root and a blade tip. Further, the rotor blade includes at least one drain hole having a diameter. The drain hole is configured within the body shell of the rotor blade. At least one airflow modifying element is configured on the body shell a predetermined distance from the drain hole such that the airflow modifying element reduces airflow noise caused by the drain hole. In one embodiment, the predetermined distance is substantially equal to the diameter of the drain hole. 1. A rotor blade assembly for a wind turbine , the rotor blade assembly comprising:at least one rotor blade including a body shell extending between a blade root and a blade tip, the body shell defining a pressure side surface and a suction side surface;at least one drain hole having a diameter, the drain hole configured within the body shell;at least one airflow modifying element configured on the body shell, the airflow modifying element located a predetermined distance from the drain hole such that the airflow modifying element reduces airflow noise caused by the drain hole, the predetermined distance equal to or less than the diameter of the drain hole.2. The rotor blade assembly of claim 1 , wherein the airflow modifying element extends a perpendicular distance from a surface of the blade to define a maximum height claim 1 , the maximum height being a function of a local boundary layer thickness.3. The rotor blade assembly of claim 2 , wherein the maximum height extends approximately 150% of the local boundary layer thickness.4. The rotor blade assembly of claim 3 , wherein the airflow modifying element has a base claim 3 , a first side claim 3 , and a second side claim 3 , the first and second sides defining respective top edges.5. The rotor blade assembly of ...

WIND TURBINE BLADE APPARATUS AND WIND TURBINE BLADE ATTACHMENT MEMBER

A wind turbine blade apparatus at least includes a wind turbine blade body, wherein a serration portion is disposed on at least on a part of a trailing edge of the wind turbine blade body, the serration portion having a saw-teeth shape where a mountain portion and a valley portion are arranged alternately in a blade longitudinal direction, and wherein a chord-directional cross section of the wind turbine blade body along a chord direction is formed to have an airfoil shape at any position in a region from the mountain portion to the valley portion. 1. A wind turbine blade apparatus at least comprising:a wind turbine blade body,wherein a serration portion is disposed on at least on a part of a trailing edge of the wind turbine blade body, the serration portion having a saw-teeth shape where a mountain portion and a valley portion are arranged alternately in a blade longitudinal direction, andwherein a chord-directional cross section of the wind turbine blade body along a chord direction is formed to have an airfoil shape at any position in a region from the mountain portion to the valley portion.2. The wind turbine blade apparatus according to claim 1 ,wherein the airfoil shape is formed in a region from a tip portion of the mountain portion to a deepest portion of the valley portion.3. The wind turbine blade apparatus according to claim 1 ,wherein the airfoil shape is a shape whose thickness changes continuously in the chord-directional cross section.4. The wind turbine blade apparatus according to claim 1 ,wherein the serration portion is configured as an attachment member to be attached to at least a part of the trailing edge of the wind turbine blade body.5. The wind turbine blade apparatus according to claim 4 , a first-surface side wall surface to be disposed on a first surface of the wind turbine blade body; and', 'a second-surface side wall surface to be disposed on a second surface of the wind turbine blade body, the second-surface side wall surface being ...

POWER GENERATION DEVICE

The present application discloses a power generation device so as to solve the generator set overspeed problem. The power generation device comprises: a stand column; and at least one generator set located on the stand column. The generator set comprises a support, blades connected to the support, and a power generator generating power by means of rotation of the blades, and an adjustment device located on the support and used for adjusting a windage area of the blades by moving or rotating the blade according to a wind speed. The wind power generation device may reduce an effective windage area to zero when the wind force is too high, thereby improving stability and applicability in a changeable environment and prolonging the service life of the apparatus. 1. A power generation device , comprising:a stand column; andat least one generator set located on the stand column, wherein each one of said at least one generator set comprises a support, a plurality of blades connected to the support, and a power generator generating power by means of rotation of the plurality of blades,wherein each of said at least one generator set further comprises an adjustment device, the adjustment device is located on the support and configured to adjust a windage area of the plurality of blades by moving or rotating the plurality of blades according to a wind speed.2. The power generation device according to claim 1 , wherein the support is connected to the stand column by means of a bearing claim 1 , and the support may rotate around the stand column.3. The power generation device according to claim 1 , wherein each of said at least one generator set further comprises a transmission device claim 1 , the transmission device is configured to transmit the rotation of the plurality of blades to the power generator.4. The power generation device according to claim 1 , wherein each of said at least one generator set further comprises an electric slip ring arranged on the stand column claim ...

WIND TURBINE BLADE COMPRISING VORTEX GENERATORS

Disclosed is a wind turbine blade and a method for retrofitting a wind turbine blade, the wind turbine blade extending in a longitudinal direction along a pitch axis and having a tip end and a root end as well as a blade length, the wind turbine blade further comprising a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord having a chord length extending there between, the profiled contour, when being impacted by an incident airflow generating a lift, wherein the suction side of the wind turbine blade is provided with a plurality of vortex generators positioned along a mounting line having a proximal end point nearest the root end and a distal end point nearest the tip end, wherein the mounting line is a concave line seen from the trailing edge of the wind turbine blade. 11028816141820363737. A wind turbine blade () for a rotor of a wind turbine () having a substantially horizontal rotor axis , the rotor comprising a hub () from which the wind turbine blade extends substantially in a radial direction when mounted to the hub () , the wind turbine blade extending in a longitudinal direction (r) along a pitch axis and having a tip end () and a root end () as well as a blade length , the wind turbine blade further comprising a profiled contour including a pressure side and a suction side , as well as a leading edge () and a trailing edge () with a chord having a chord length extending there between , the profiled contour , when being impacted by an incident airflow generating a lift , wherein the suction side of the wind turbine blade is provided with a plurality of vortex generators positioned along a mounting line () having a proximal end point (A) nearest the root end and a distal end point (B) nearest the tip end , characterised in that the mounting line is a concave line seen from the trailing edge of the wind turbine blade , wherein the proximal end point is located in a blade length interval of ...

METHOD FOR CONTROLLING A PROFILE OF A BLADE ON A WIND TURBINE

The invention regards an apparatus or method for controlling the profile of a blade on a wind turbine having at least a first blade and a second blade, the first blade comprise at least one first sensor system adapted to determine a first blade state and the second blade comprise at least one second sensor system adapted to determine a second blade state, wherein the profile of the second blade is controlled based on the determined first blade state and the determined second blade state. 2. Method according to claim 1 , wherein the determined second blade state is time delayed in relation to the first blade state.3. Method according to claim 1 , wherein the first blade state is determined at a first blade position in the rotor plane and the second blade state is determined at a second blade position in the rotor plane.4. Method according to claim 3 , wherein the first blade position in the rotor plane is substantially the same as the second blade position in the rotor plane.5. Method according to claim 1 , whereinthe first blade state is defined by a blade moment of the first blade, and/or a pitch angle feedback of the first blade, and/or a deflection of the first blade and/or an acceleration of the first blade, and/orthe second blade state is defined by a blade moment of the second blade, and/or a pitch angle feedback of the second blade, and/or a deflection of the second blade and/or an acceleration of the second blade.6. Method according to claim 1 , wherein a control system ascertains validity of the determined first blade state and/or the determined second blade state claim 1 , by comparing the determined first blade state and the determined second blade state.7. Method according to claim 1 , wherein the control system ascertains the validity of the second blade state in a point in the rotor plane by comparing the determined second blade state with the determined first blade state in substantially the same point in the rotor plane.8. Method according to claim 6 ...

Wind turbine rotor blade with serrated extension

A wind turbine rotor blade is provided, having a root end, a tip end, a leading edge section, a trailing edge section and a serrated extension, wherein the serrated extension is attached to the trailing edge section and has at least a first tooth. Furthermore, the wind turbine rotor blade has at least one patterning element for guiding a wind flow which is flowing from the leading edge section to the trailing edge section such that noise which is generated at the trailing edge section is reduced. The patterning element has the shape of a ridge. Advantageously, the ridge-shaped patterning element is located upstream, compared to the first tooth, and/or is located on a surface of the first tooth. Furthermore, a method is provided to reduce noise which is generated at a trailing edge section of a wind turbine rotor blade.

ARRANGEMENT TO REDUCE NOISE OF A WIND TURBINE ROTOR BLADE

An arrangement to reduce noise of a wind turbine rotor blade is provided, including a wind turbine rotor blade and a noise reduction device. The noise reduction device includes a serrated extension for at least reducing noise generated from the wind turbine rotor blade, the noise reduction device attached to the trailing edge section. The serrated extension has a number of first and second teeth. The designs of the first and second teeth are differently compared to each other such that suction side noise and pressure side noise are both reduced by the teeth of the serrated extension. Advantageously, the first teeth and the second teeth are arranged in an alternating, periodic pattern and differ from each other by an angle of inclination with regard to a trailing edge streamline and or by its planform shape. Furthermore, a method to reduce noise of a wind turbine rotor blade is provided. 1. An arrangement to reduce noise of a wind turbine rotor blade , wherein the arrangement comprisesa wind turbine rotor blade and a noise reduction device,the wind turbine rotor blade comprises a root end, a tip end, a leading edge section and a trailing edge section,the noise reduction device comprises a serrated extension for at least reducing noise which is generated from the wind turbine rotor blade, andthe noise reduction device is attached to the trailing edge section,wherein the serrated extension comprises a number of first teeth and a number of second teeth, andwherein the design of the first teeth and the design of the second teeth are differently compared to each other such that suction side noise, which is generated at a suction side of the wind turbine rotor blade, and pressure side noise, which is generated at a pressure side of the wind turbine rotor blade, are both reduced by the teeth of the serrated extension.2. The arrangement according to claim 1 , whereinthe trailing edge section comprises a trailing edge, andthe first teeth and the second teeth are arranged in a ...

Methods for Mitigating Noise during High Wind Speed Conditions of Wind Turbines

A method for mitigating noise during high wind speed conditions of a wind turbine includes providing a backward twist to the outboard region of the rotor blade having an angle of less than 6°. The method may also include reducing a tip chord taper within at least a portion of the outboard region of the rotor blade. Further, the method may include increasing a local tip chord length of the rotor blade. In addition, the method may include increasing a torsional stiffness of the outboard region of the rotor blade. As such, a combination of one or more of the blade properties described above are configured to reduce noise associated with high wind speed conditions.

ROTOR BLADE FOR A WIND TURBINE AND WIND TURBINE

A rotor blade for a wind turbine, to a wind turbine having a tower, a nacelle and a rotor, and also to a wind farm. The rotor blade comprises an inner blade portion which extends in the longitudinal direction of the rotor blade starting from a rotor blade root, and a trailing edge segment which is arranged on the inner blade portion and intended for increasing the profile depth of the rotor blade along a portion in the rotor blade longitudinal direction. The rotor blade has a pressure-side surface and a suction-side surface which are each formed in certain regions from parts of the inner blade portion and of the trailing edge segment. At least one slot-like air inlet and/or air outlet which extends substantially in the rotor blade longitudinal direction is formed on the pressure-side and/or suction-side surface of the rotor blade in the region of the trailing edge segment. The rotor blade achieves a more efficient influence on the boundary layer. 1. A rotor blade for a wind turbine , comprising:an inner blade portion which extends in a longitudinal direction of the rotor blade starting from a rotor blade root;a trailing edge segment arranged on the inner blade portion, wherein the trailing edge segment increases a profile depth of a portion of the rotor blade;a pressure-side surface and a suction-side surface which are each formed in part from the inner blade portion and the trailing edge segment; andat least one of: air inlet or air outlet at the pressure-side surface or the suction-side surface of the trailing edge segment and extending substantially in the longitudinal direction of the rotor blade.2. The rotor blade as claimed in claim 1 , comprising both the air inlet and the air outlet claim 1 , wherein the air inlet and the air outlet are arranged on respective sides of the pressure-side surface and the suction-side surface of the rotor blade.3. The rotor blade as claimed in claim 1 , wherein the air inlet and the air outlet are located in a transition region ...

ROTOR BLADE OF A WIND TURBINE, HAVING A SPLITTER PLATE

A rotor blade of a wind turbine, wherein the rotor blade has in particular a splitter plate, which is arranged on the blunt trailing edge of the rotor blade. The splitter plate comprises: a root edge, wherein the root edge is arranged on, in particular along, the trailing edge below a transition from the suction side into the trailing edge, an end edge, wherein the end edge forms a free edge, and a surface between the root edge and the end edge, wherein the surface has at least one curved part between the root edge and the end edge, and at least one part of the surface lies in the shear layer generated by the suction side. 1. A rotor blade of a wind turbine , the rotor blade comprising:a leading edge and a blunt trailing edge;a suction side and a pressure side between the leading edge and the trailing edge, wherein the suction side generates a shear layer when air flows around during operation of the wind turbine,wherein the leading edge, the blunt trailing edge, the suction side and the pressure side form a reference system in which the leading edge is arranged in front of the trailing edge and the suction side is arranged above the pressure side, and wherein, in the reference system, a profile chord direction extends from the leading edge to the trailing edge; and a root edge, wherein the root edge is arranged on the trailing edge below a transition from the suction side into the trailing edge;', 'an end edge, wherein the end edge forms a free edge; and', 'a surface between the root edge and the end edge, wherein the surface comprises at least one curved part between the root edge and the end edge, and at least one part of the surface lies in the shear layer generated by the suction side., 'a splitter plate arranged on the blunt trailing edge of the rotor blade, wherein the splitter plate comprises2. The rotor blade as claimed in claim 1 , wherein the curved part of the surface lies at least partially in the shear layer.3. The rotor blade as claimed in claim 2 , ...

Positioning profiles for pultrusions in wind blade spar caps

Provided herein is a spar cap having a profile for guiding and receiving a shear web for wind turbine blade. Particularly, the present disclosure provides a pultruded spar cap having a bond gap feature to maintain a uniform space for distribution of bonding paste between the spar cap and shear web. Also, the spar cap is formed with locating features which guide and receive placement of the shear web.

AEROFOIL TIP STRUCTURE, PARTICULARLY FOR A HAWT ROTOR BLADE

A tip structure may be arranged for example on a rotor blade () of a HAWT (). The tip structure comprises a pressure side structure () arranged on a pressure side () of the blade, and a suction side structure () arranged on a suction side () of the blade (). The pressure side and suction side structures () have different pitch angles (αP, αS) so that the chord (CP) of the pressure side structure () extends forwardly in the direction of motion (D) and relatively more radially outwardly away from the blade root, or less radially inwardly towards the blade root, than the chord (CS) of the suction side structure (), defining a relative twist angle (αT) between the two structures (). 12021222324251312. A tip structure ( , , , , , ) for use in a use position at a free end region () of an aerofoil () ,{'b': 13', '14, 'the aerofoil extending along a length axis (L) from the free end region () to an opposite, supported end region (),'}{'b': 2', '2, 'the aerofoil being mounted in use at the supported end region for motion in a direction of motion (D) in an airflow (W) relative to the aerofoil, the airflow (W) at the free end region being opposed to the direction of motion (D),'}{'b': 2', '1', '40, 'wherein if the airflow (W) is generated by rotation of the aerofoil about an axis of rotation (Y), then the direction of motion (D) is defined as a tangent of a swept circle () at the tip structure, the swept circle defined by rotation of the tip structure about the axis of rotation;'}{'b': 41', '42, 'wherein, when considered in section in a section plane (Aref, Ai) normal to the length axis (L), the aerofoil defines a profile having a maximum length dimension defined by a chord (Cref, Ci), the chord being a straight line having a length between a leading edge point () on the profile and a trailing edge point () on the profile;'}{'b': 43', '44, 'the profile extending between the leading edge point and the trailing edge point on a first, pressure side () of the aerofoil and a second ...

ROTOR

The stability of power generation efficiency against variation of fluid speed and direction can be improved. The disclosed rotor for a wind or water power machine includes a hub supported by a main shaft, and blades each having a root end connected to the hub. In a projection plane perpendicular to a rotational center axis O of the rotor, a leading edge of the blade has leading edge bulge portions and protruding forward in the rotor rotational direction only at two different locations in the rotor radial direction. 1. A rotor for a wind or water power machine , the rotor comprising a hub , supported by a main shaft , and a blade , having a root end connected to the hub , wherein ,in a projection plane perpendicular to a rotational center axis of the rotor, a leading edge of the blade has leading edge bulge portions only at two different locations in a rotor radial direction, the leading edge bulge portions each protrudes in a bulge shape forward in a rotor rotational direction.2. The rotor according to claim 1 , wherein claim 1 ,in the projection plane,{'b': '1', 'when a tangent line of the hub at a central point in a rotor circumferential direction of the root end of the blade is defined as a first virtual line VL, and'}{'b': 1', '1', '2, 'when a virtual line that is parallel to the first virtual line VL and is located on an opposite side of the hub by a distance of 0.50 times a length of the blade BL from the first virtual line VL is defined as a second virtual line VL,'}{'b': 2', '2, 'the leading edge of the blade has a protrusion tip of one of the leading edge bulge portions located inward in the rotor radial direction relative to the second virtual line VL and a protrusion tip of the other leading edge bulge portion located outward in the rotor radial direction relative to the second virtual line VL.'}3. The rotor according to claim 2 , wherein claim 2 ,in the projection plane,{'b': 1', '1', '3', '4', '5, 'when virtual lines that are parallel to the first ...

Wind Turbine Rotor Blade Assembly for Reduced Noise

A rotor blade assembly of a wind turbine includes a rotor blade having an aerodynamic body with an inboard region and an outboard region. The inboard and outboard regions define a pressure side, a suction side, a leading edge, and a trailing edge. The inboard region includes a blade root, whereas the outboard region includes a blade tip. The rotor blade also defines a chord and a span. Further, the inboard region includes a transitional region of the rotor blade that includes a maximum chord. Moreover, a chord slope of the rotor blade in the transitional region ranges from about −0.10 to about 0.10 from the maximum chord over about 15% of the span of the rotor blade. 1. A rotor blade assembly of a wind turbine , the rotor blade assembly comprising:a rotor blade comprising an aerodynamic body having an inboard region and an outboard region, the inboard and outboard regions defining a pressure side, a suction side, a leading edge, and a trailing edge, the inboard region comprising a blade root, the outboard region comprising a blade tip, the rotor blade defining a chord and a span;the inboard region comprising a transitional region of the rotor blade that comprises a maximum chord,wherein a chord slope of the rotor blade in the transitional region ranges from about −0.10 to about 0.10 from the maximum chord over about 15% of the span of the rotor blade.2. The rotor blade assembly of claim 1 , wherein the chord slope of the rotor blade in the transitional region ranges from about −0.06 to about 0.06 from the maximum chord over about 15% of the span of the rotor blade.3. The rotor blade assembly of claim 1 , wherein the transitional region comprises from about 15% span to about 30% span of the rotor blade.4. The rotor blade assembly of claim 1 , wherein the inboard region comprises from about 0% span to about 40% span from the blade root of the rotor blade in a span-wise direction and the outboard region comprises from about 40% span to about 100% span from the blade ...

Joint Interface for Wind Turbine Rotor Blade Components

A rotor blade component for a wind turbine includes a first structural component, such as a spar cap, formed from a plurality of stacked pultruded members. A second structural component, such as a shear web, is fixed to the first structural component at a joint interface. One or more webs form the joint interface, wherein each of the webs has a first section bonded between at least two of the pultruded members in the first structural component and a second section extending across the joint interface and bonded onto or into the second structural component.

A Wind Turbine Blade

A wind turbine blade is described having a serrated trailing edge. Flow straightening vanes are provided on the serrations, to prevent a lateral or side flow over the edges of the serrations, which are preferably provided at incidence to the flow over the wind turbine blade. The vanes can be formed integrally with the serrations, or attached to existing serrations as a retrofit solution. The serrations with the vanes can be provided as a trailing edge panel for attachment to the trailing edge of an existing wind turbine blade. 1101820101002010. A wind turbine () blade having a profiled contour including a pressure side and a suction side , and a leading edge () and a trailing edge () with a chord having a chord length extending therebetween , the wind turbine blade () extending in a spanwise between a root end and a tip end , the wind turbine blade comprising a plurality of serrations () provided along at least a portion of the trailing edge () of the blade () ,{'b': 10', '106', '100', '106', '100, 'wherein the wind turbine blade () further comprises at least one flow straightening vane () projecting from a surface of said serrations (), said at least one flow straightening vane () arranged to straighten flow over said surface of said serrations ().'}210010220101042010102104106. The wind turbine blade of claim 1 , wherein the serrations () comprise a base () proximal to the trailing edge () of the blade () and an apex () distal to the trailing edge () of the blade () with a notional line extending from a midpoint of the base () to the apex () claim 1 , and wherein the at least one flow straightening vane () is arranged spaced from the notional line.3100106100. The wind turbine blade of claim 1 , wherein the serrations () have a substantially uniform thickness with the at least one flow straightening vane () projects claim 1 , e.g. substantially normal claim 1 , to the surface of said serrations ().4106100. The wind turbine blade of claim 1 , wherein said at least ...

Wind Turbine

A wind turbine comprises a rotor comprising radially outwardly extending blades which are twisted in cross-sectional shape so as to achieve a constant angle of attack. Additionally, the blades are connected at their outer ends to a peripheral rotor ring which is arranged to engage and drive a rotary member of a generation system of the wind turbine that is mounted at a fixed angular position relative to the rotor ring. The wind turbine is operated in a manner which includes determining for each of a plurality of wind speeds a relationship between rotation rate and optimum power output and varying the power output of the generation system to change the load on the rotor to maintain the rotation rate at or adjacent the rotation rate which provides the optimum power output.

ROTOR BLADE WITH A SERRATED TRAILING EDGE

A rotor blade for a wind turbine, wherein the rotor blade includes serrations along at least a portion of the trailing edge section of the rotor blade is provided. The serrations include a first tooth and at least a second tooth, wherein the first tooth is spaced apart from the second tooth. Furthermore, the area between the first tooth and the second tooth is at least partially filled with a plurality of comb elements, wherein the comb elements are arranged substantially parallel to each other and in substantially chordwise direction of the rotor blade such that generation of noise in the trailing edge section of the rotor blade is reduced. The rotor blade is further characterized in that it includes a plurality of ridges including a first ridge and at least a second ridge for manipulating an airflow which is flowing along the ridges. 1. A rotor blade for a wind turbine , the rotor blade comprises serrations along at least a portion of the trailing edge section of the rotor blade,', 'the serrations comprise a first tooth and at least a second tooth, wherein the first tooth is spaced apart from the second tooth,', 'the area between the first tooth and the second tooth is at least partially filled with a plurality of comb elements comprising a first comb element and at least a second comb element, wherein the comb elements are arranged substantially parallel to each other and in substantially chordwise direction of the rotor blade, such that generation of noise in the trailing edge section of the rotor blade is reduced,, 'wherein'}whereinthe rotor blade further comprises a plurality of ridges comprising a first ridge and at least a second ridge for manipulating an airflow which is flowing along the ridges.2. The rotor blade according to claim 1 ,wherein the ridges are arranged substantially parallel to each other and in substantially chordwise direction of the rotor blade.3. The rotor blade according to claim 1 , at least three times greater, in particular at least ...

RIGID POLYMERIC BLADE FOR A WIND TURBINE AND METHOD AND APPARATUS TO MANUFACTURE SAME

In an embodiment, a molding apparatus for a turbine blade includes first and second mold compartments defining a mold cavity when in a closed position, at least one of the first and second mold compartments including a micro-structured surface facing an interior of the mold cavity. The micro-structured surface includes an array of V-shaped channels, and the V-shaped channels have a maximum height of 200 micrometers. A turbine blade including integral micro-structured riblets and method for making the turbine blade is also provided. 1. A molding apparatus for a turbine blade comprising:first and second mold compartments defining a mold cavity when in a closed position, at least one of the first and second mold compartments including a micro-structured surface facing an interior of the mold cavity;wherein the micro-structured surface includes an array of V-shaped channels, theV-shaped channels having a maximum height of 200 micrometers.2. The molding apparatus of claim 1 , further comprising a container in fluid communication with one or more of the first and second mold compartments claim 1 , the container configured to introduce a liquid monomer claim 1 , curing agent or liquid polymer to said mold cavity for polymerization therein.3. The molding apparatus of claim 1 , further comprising a heat or radiation source to polymerize or cure the monomer or polymer in the mold cavity.4. The molding apparatus of claim 1 , wherein the first and second mold compartments define a leading edge and a trailing edge area claim 1 , wherein the trailing edge area includes the micro-structured surface.5. The molding apparatus of claim 1 , wherein the micro-structured surface is metal.6. A turbine blade comprising:a major axis running along a longest dimension of the turbine blade;integrally-formed riblets having a maximum height of 200 micrometers on the surface of the turbine blade.720. The turbine blade of claim 6 , wherein the riblets run perpendicular to the major axis of the ...

ROTOR FOR A WIND TURBINE, WIND TURBINE AND ASSOCIATED METHOD

A rotor for a wind, to a wind turbine and to a method for increasing the yield of a rotor of a wind turbine. In particular, a rotor for a wind turbine, comprising at least one rotor blade, having a rotor blade trailing edge and rotor blade leading edge extending between the rotor blade root and the rotor blade tip over a rotor blade length, a profile depth established between the rotor blade leading edge and the rotor blade trailing edge, and an adjustable pitch angle, wherein the rotor blade has at least one profile element which is arranged on the rotor blade trailing edge or in the region adjacent to the rotor blade trailing edge for increasing the profile depth by an enlargement value, characterized by a control unit for determining a pitch angle to be set, which is configured to determine the pitch angle to be set depending on the enlargement value. 1. A rotor for a wind turbine , the rotor comprising: 'a rotor blade root and a rotor blade tip,', 'a rotor blade coupled to the rotor, the rotor blade having a profile depth between the rotor blade leading edge and the rotor blade trailing edge,', 'an adjustable pitch angle, and', 'a profile element arranged on the rotor blade trailing edge or in a region adjacent to the rotor blade trailing edge for increasing the profile depth by an enlargement value, and, 'a rotor blade trailing edge and rotor blade leading edge extending between the rotor blade root and the rotor blade tip over a rotor blade length,'}a controller configured to determine a pitch angle in dependence on the enlargement value.2. The rotor as claimed in claim 1 , wherein the controller is configured to determine the pitch angle to be set depending on two or more enlargement values and/or on a profile of the enlargement value.3. The rotor as claimed in claim 2 , wherein the controller is configured to determine the pitch angle to be set in indirect or direct dependence on the enlargement value.4. The rotor as claimed in claim 3 , wherein the ...

WIND TURBINE ROTOR BLADE COMPONENTS FORMED USING PULTRUDED RODS

Wind turbine rotor blade components including pultruded rods and methods of manufacturing the same are disclosed. More specifically, the rotor blade component includes a plurality of pultruded rods housed within an enclosed primary outer casing. The enclosed primary outer casing includes a hollow interior, a root end, and an opposing tip. As such, each of the plurality of pultruded rods is received within the enclosed primary outer casing and secured therein via a first resin material. Further, an arrangement of the plurality of pultruded rods within the primary outer casing and a relationship of a maximum dimension of each of the plurality of pultruded rods and a maximum dimension of the enclosed primary outer casing are configured to maximize flexibility of the rotor blade component. 1. A rotor blade component for a wind turbine , the rotor blade component comprising:an enclosed primary outer casing defining a hollow interior; and,a plurality of pultruded rods received within the hollow interior of the enclosed primary outer casing and secured therein via a first resin material,wherein an arrangement of the plurality of pultruded rods within the enclosed primary outer casing and a relationship of a maximum dimension of each of the plurality of pultruded rods and a maximum dimension of the enclosed primary outer casing are configured to maximize flexibility of the rotor blade component.2. The rotor blade component of claim 1 , wherein each of the plurality of pultruded rods comprises a first fiber volume fraction of from about 60% to about 80%.3. The rotor blade component of claim 1 , wherein the enclosed primary outer casing claim 1 , the plurality of pultruded rods claim 1 , and the first resin material together comprise a second fiber volume fraction of from about 50% to about 70%.4. The rotor blade component of claim 1 , wherein the maximum diameter of each of the plurality of pultruded rods corresponds to a diameter thereof claim 1 , the diameter of each of ...

Method for determining arrangement position of vortex generator on wind turbine blade, method for producing wind turbine blade assembly, and wind turbine blade assembly

A wind turbine blade comprising a vortex generator including a plurality of fins. The plurality of fins include a first fin positioned closest to a blade tip, and the first fin is disposed closer to a blade root than a position closer to the blade tip, of a blade spanwise directional position at which a ratio t/C of a blade thickness ‘t’ to a chord length C is 0.4 or a radial directional position of 0.2 R with respect to a radius R of a rotor including the wind turbine blade. The vortex generator may include at least one fin disposed in a mounting range of zero to 0.1 R, such that a ratio x/C of a chordwise directional position x of the at least one fin to the chord length C satisfies 0≤x/C≤0.2.

ROTOR BLADE FOR A WIND TURBINE

A rotor blade of an aerodynamic rotor of a wind turbine having a rotor axis of rotation and an outer radius, comprising a blade root for fastening to a rotor hub, a blade tip which faces away from the blade root, a blade longitudinal axis which extends from the blade root to the blade tip, a blade front edge which faces toward the front in the direction of movement of the rotor blade, a blade rear edge which faces toward the rear in the direction of movement of the rotor blade, and profile sections which change along the blade longitudinal axis, wherein each profile section has a profile chord which extends from the blade front edge to the blade rear edge, and each profile chord has an installation angle as an angle in relation to a rotor plane, wherein the installation angle from the blade root to the blade tip first decreases in a blade inner region oriented toward the blade root, increases again in a blade central region and decreases again in a blade tip region oriented toward the blade tip. A rotor of a wind turbine and to a corresponding wind turbine. 1. A rotor blade of an aerodynamic rotor of a wind turbine having a rotor axis of rotation and an outer radius , the rotor blade comprising:a blade root for fastening to a rotor hub;a blade tip facing away from the blade root;a blade longitudinal axis extending from the blade root to the blade tip;a blade front edge facing toward a front in a direction of movement of the rotor blade;a blade rear edge facing toward a rear in the direction of movement of the rotor blade; anda plurality of profile sections along the blade longitudinal axis, first decreases in a blade inner region oriented toward the blade root,', 'increases again in a blade central region, and', 'decreases again in a blade tip region oriented toward the blade tip., 'wherein each profile section has a profile chord extending from the blade front edge to the blade rear edge, wherein each profile chord has an installation angle as an angle in relation ...

WIND TURBINE ROTOR BLADE

A rotor blade of a wind power installation, comprising an inner section in which the rotor blade is fastened on a rotor hub, and an outer section, which is connected to the rotor blade and comprises a rotor blade tip. The rotor blade has at least partially a flat back profile having a truncated rear edge in the inner section, and at least one control unit for controlling the wake is provided on the rotor blade on the flat back profile. 1. A wind power installation rotor blade comprising:an inner section having an end configured to fasten the rotor blade to a rotor hub; andan outer section including a rotor blade tip, a flat back profile having a truncated rear edge, and', 'at least one flow control unit for actively controlling a wake provided on the rotor blade at the flat back profile,, 'wherein at least a portion of the inner section includeswherein the at least one flow control unit comprises at least one cylindrical body having a longitudinal axis, the at least one cylindrical body configured to be rotated about the longitudinal axis, andwherein the at least one flow control unit is provided on the truncated rear edge.2. The wind power installation rotor blade of claim 1 , wherein the at least one cylindrical body is a plurality of cylindrical bodies claim 1 , each having a longitudinal axis wherein each cylindrical body of the plurality of cylindrical bodies are configured to be rotated about their respective longitudinal axis.3. The wind power installation rotor blade of claim 2 , wherein the plurality of cylindrical bodies are coupled together by a conveyor belt for moving an incident flow flowing around the flat back profile.4. The wind power installation rotor blade of claim 1 , wherein the at least one cylindrical body is configured to be rotated in and counter to an incident flow direction.5. The wind power installation rotor blade of claim 1 , wherein the at least one flow control unit is integrated into the rotor blade.6. The wind power installation ...

Low Reynolds Number Airfoil for a Wind Turbine Blade and Method Thereof

A low Reynolds number airfoil for a wind turbine blade, the airfoil having a leading edge a trailing edge spaced from the leading edge a chord defined as a straight line joining the leading edge and the trailing edge, a chord length defined as distance between the trailing edge and the point on the leading edge where the chord intersects the leading edge wherein the airfoil comprises a camber between 5% to 7% of the chord length, the camber is disposed within a distance of 17% of the chord length from the leading edge and a thickness of the airfoil not greater than 7% of the chord length. In an embodiment, it discloses A method of designing blade for low wind speed turbine for a site location, the method comprising obtaining time series data for the site location, computing a Weibull shape factor (K) and scale factor (C)corresponding to a Weibull distribution function based on the time series data for the site location, using K and C to identify energy intensive wind speed at the site location, determining blade length based on the energy intensive wind speed, K, C, a design power (PD) of the turbine, a design power coefficient (Cpd), and a density of the air (Ro), wherein the rated power of the turbine depends on load to be connected of the turbine, selecting a generator for use with the turbine, computing a design tip speed ratio based on a rated speed of the generator (NGD), a gear ratio (GR), the design power (PD), K, and C, identifying number of blades (B) depending on the design tip speed ratio and an end-use of the power being produced by the turbine; and identifying a chord length and twist of the blade from root-to-tip. 1. A low Reynolds number airfoil for a wind turbine blade , the airfoil having:a leading edge;a trailing edge spaced from the leading edge;a chord as a straight line joining the leading edge and the trailing edge, the chord length defined as distance between the trailing edge and the point on the leading edge where the chord intersects the ...

WIND TURBINE BLADE WITH NOISE REDUCTION DEVICES AND RELATED METHOD

The present disclosure relates to a wind turbine blade, in particular a wind turbine blade having devices or structures for reducing noise generated by the wind turbine blade during use and related method. The wind turbine blade comprises at least a first longitudinal section having a cross section perpendicularly to a longitudinal direction, the cross section having a plurality of flow modulating devices including a first primary flow modulating device and a secondary flow modulating device for modulating noise spectra, wherein the first primary flow modulating device and the first secondary flow modulating device are spaced perpendicularly to the longitudinal direction. Also disclosed is a method of retrofitting a wind turbine blade. 1. A wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft , the rotor comprising a hub , from which the wind turbine blade extends substantially in a radial direction when mounted to the hub , the wind turbine blade extending in a longitudinal direction parallel to a longitudinal axis and having a tip end and a root end , the wind turbine blade further comprising at least a first longitudinal section having a cross section with a first plurality of projecting elements provided at the trailing edge on said pressure side and a second plurality of projecting elements provided at the trailing edge on said suction side, said first plurality spaced from said second plurality in a flapwise direction,', 'wherein said first plurality of projecting elements are arranged to perform a first modulation operation of a boundary layer flow of the pressure side of the blade, wherein said second plurality of projecting elements are arranged to perform a second modulation operation of a boundary layer flow of the suction side of the blade, said first and second modulation operations operable to reduce the operational noise of the wind turbine blade, and', 'wherein said first plurality of projecting elements and ...

WIND TURBINE BLADE WITH A TRAILING EDGE SPACING SECTION

A wind turbine blade is provided with two shell parts each at least partly made of a sandwich structure including an inner skin (), an outer skin (), and an intermediate core material (), wherein the shell parts are bonded together at least along their respective leading edges (). The blade also comprises a longitudinally extending spacing section in which the respective trailing edges () of the pressure side shell part and the suction side shell part are spaced apart, wherein a trailing edge shear web () is arranged between and connected to the sandwich structure of the suction side shell part () and the sandwich structure of the pressure side shell part (). 110281081614. A blade () for a rotor of a wind turbine () having a substantially horizontal rotor shaft , said rotor comprising a hub () , from which the blade () extends substantially in a radial direction when mounted to the hub () , the blade having a longitudinal direction (r) with a tip end () and a root end () and a vertical direction , the blade further comprising:{'b': 18', '20, 'a profiled contour including a pressure side and a suction side, as well as a leading edge () and a trailing edge () with a chord having a chord length (c) extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift,'}{'b': 76', '74', '75', '77, 'a pressure side shell part at least partly made of a sandwich structure including an inner skin (), an outer skin (), and an intermediate core material (, ),'}{'b': 86', '84', '85', '87', '18, 'a suction side shell part at least partly made of a sandwich structure including an inner skin (), an outer skin (), and an intermediate core material (, ), wherein the suction side shell part is bonded to the pressure side shell part at least along the respective leading edges () of the shell parts,'}{'b': 65', '58', '58, 'i': a', 'b, 'a longitudinally extending spacing section () in which the respective trailing edges (, ) of the pressure side ...

ROOT AIRFOIL OF WIND TURBINE BLADE

A root airfoil of a wind turbine blade has a suction surface and a pressure surface formed at the upper portion and at the lower portion of a chord line which connects the leading edge and the trailing edge. The operating Reynolds number is 30,000 to 1,000,000, and the angle of attack of the airfoil is 0 to 21 degrees. The maximum lift coefficient is 0.8 to 1.1, and the minimum drag coefficient is 0.02 to 0.07. 1. A root airfoil of a small-scale wind turbine blade , the root airfoil having a suction surface and a pressure surface formed at an upper side and a lower side of a chord line which connects a leading edge and a trailing edge ,wherein an operating Reynolds number is 30,000 to 1,000,000, an angle of attack of the airfoil is 0 to 21 degrees, a maximum lift coefficient is 0.8 to 1.1, and a minimum drag coefficient is 0.02 to 0.07.2. The root airfoil according to claim 1 , wherein a maximum lift-to-drag ratio of the root airfoil is between 12 and 34.3. The root airfoil according to claim 1 , wherein a maximum thickness ratio of the root airfoil is 22%. The present invention relates to a cross-sectional shape of a root airfoil among airfoils of a blade used in a wind turbine, and more specifically, to a root airfoil of a wind turbine blade having a thickness ratio capable of enduring the load of the blade and having a high maximum lift coefficient and a high lift-to-drag ratio for stable operation.As natural resources such as petroleum, coal, natural gas and the like are depleted together with development of industry and increase in population, a lot of studies on general wind turbines for generating electric energy using power of wind are under progress as an alternative energy source, and the range of use of the wind turbines is gradually expanded owing to low cost and eco-friendly reasons since the wind turbines use wind existing in the nature as an energy source.A wind turbine of a prior art is described with reference to drawings.Referring to , in a wind ...

Wind turbine noise reduction with acoustically absorbent serrations

A wind turbine blade includes a trailing edge including a radially inboard portion and a radially outboard portion opposite the radially inboard portion. The trailing edge further includes at least one serrated portion extending at least partially between the radially inboard portion and the radially outboard portion. The serrated portion includes at least one substantially acoustically absorbent material.

Mountable wing tip device for mounting on a rotor blade of a wind turbine arrangement

A mountable wing tip device ( 102 ) for mounting on a rotor blade of a wind turbine is disclosed which comprises a forward extremity ( 106 ) and at least two rearward extremities ( 108 A, 108 B, 112 ), wherein the forward extremity ( 106 ) and the at least two rearward extremities ( 108 A, 108 B, 112 ) are triangularly arranged, a leading edge region extending between the forward extremity ( 106 ) and the at least two rearward extremities ( 108 A, 108 B, 112 ), and a trailing edge region extending between the rearward extremities ( 108 A, 108 B, 112 ), a root region ( 113 ) at which the wing tip device ( 102 ) is mountable on an end of the rotor blade, wherein the root region ( 113 ) is positioned between the leading edge region and the trailing edge region.

WIND TURBINE ROTOR BLADE

The present disclosure is directed to a rotor blade that includes a shell defining an interior cavity. The rotor blade also includes exterior surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge. Each of the pressure side, the suction side, the leading edge, and the trailing edge extends between a tip and a root. The shell defines a span and a chord. A shear web is positioned in the interior cavity and coupled to the shell. The shear web includes a lattice structure. 1. A rotor blade , comprising:a shell defining an interior cavity and comprising exterior surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge each extending between a tip and a root, the shell defining a span and a chord; anda shear web positioned in the interior cavity and coupled to the shell, wherein the shear web comprises a lattice structure.2. The rotor blade of claim 1 , wherein the shear web comprises a first shear web member coupled to a second shear web member claim 1 , the first shear web member comprising a first lattice structure and the second shear web member comprising a second lattice structure.3. The rotor blade of claim 2 , wherein the first shear web member comprises a projection and the second shear web member comprises a slot for receiving the projection of the first shear web.4. The rotor blade of claim 1 , wherein the shell comprises a first shell portion defining the pressure side and a second shell portion defining the suction side claim 1 , the first shell portion coupled to the second shell portion claim 1 , and wherein a first side of the shear web is coupled to the first shell portion and a second side of the shear web is coupled to the second shell portion.5. The rotor blade of claim 1 , wherein a first side of the shear web and a second side of the shear web are filled with foam.6. The rotor blade of claim 1 , further comprising:a first cap coupled to a first side of the shear web and a portion of the ...

WIND TURBINE ROTOR BLADE TRAILING EDGE SEGMENT

A trailing-edge segment of a wind-turbine rotor blade for increasing a profile depth of the rotor blade of a wind turbine. The trailing-edge segment of a wind-turbine rotor blade comprises at least one inner blade segment, having an inner blade shell, at least one middle blade segment, having a middle blade shell. In this case, the at least one middle blade segment and the at least one inner blade segment can be coupled to each other via a coupling means, and the coupling means has at least one shell element, having two inner sides that are parallel to each other and form a receiving space, designed to receive at least one of the inner blade shell or middle blade shell, and the two inner sides each being realized such that they can be connected to at least one of the inner blade shell or middle blade shell, in such a manner that a force acting upon the trailing-edge segment of a wind-turbine rotor blade is introduced centrically into the coupling means. 1. A trailing-edge segment of a wind-turbine rotor blade for increasing a profile depth of the rotor blade of a wind turbine , trailing-edge segment comprising:at least one inner blade segment having an inner blade shell,at least one middle blade segment having a middle blade shell,the at least one middle blade segment and the at least one inner blade segment being configured to be coupled to each other via a coupling means,the coupling means having at least one shell element having two inner sides that are parallel to each other and form a receiving space,the receiving space being configured to receive at least one of: the inner blade shell and the middle blade shell, andeach of the two inner sides of the coupling means being configured to be coupled to at least one of: the inner blade shell and the middle blade shell in such a manner that a force acting upon the trailing-edge segment is introduced centrically into the coupling means.2. The trailing-edge segment of a wind-turbine rotor blade according to claim 1 , ...

Wind Turbine Blades and Wind Turbine Systems That Include a Co-flow Jet

Wind turbine blades and wind turbine systems that include a co-flow jet are described. An example wind turbine blade has a main body and a fluid pressurizer. The main body has a first portion, a second portion, a leading edge, a trailing edge, an injection opening, a suction opening, and a channel. The first portion has a first cross-sectional shape and the second portion has a second cross-sectional shape that is different than the first cross-sectional shape. The injection opening is disposed on the first portion between the leading edge and the trailing edge. The channel extends from the suction opening to the injection opening. The fluid pressurizer is disposed within the channel. 1. A wind turbine blade comprising:a main body having a first portion, a second portion, a leading edge, a trailing edge, an injection opening, a suction opening, and a channel, the first portion having a first cross-sectional shape and the second portion having a second cross-sectional shape that is different than the first cross-sectional shape, the injection opening disposed on the first portion between the leading edge and the trailing edge, the channel extending from the suction opening to the injection opening; anda fluid pressurizer disposed within the channel.2. The wind turbine blade of claim 1 , wherein the blade has a front claim 1 , wind facing surface and a rear surface; andwherein the injection opening is disposed on the rear surface.3. The wind turbine blade of claim 1 , wherein the blade has a front claim 1 , wind facing surface and a rear surface; andwherein the suction opening is disposed on the rear surface.4. The wind turbine blade of claim 1 , wherein the first portion has a cylindrical cross-sectional shape.5. The wind turbine blade of claim 1 , wherein the second portion has a cross-sectional shape that defines an airfoil.6. The wind turbine blade of claim 1 , wherein the blade has a root claim 1 , a tip claim 1 , and a length that extends from the root to the ...

WIND TURBINE BLADE HAVING A SHAPED STALL FENCE OR FLOW DIVERTER

A wind turbine blade is described wherein at least on planar member is provided on the blade surface, where the planar member is arranged such that it extends at an angle to the chord of the blade. The planar member acts to re-direct airflow over the blade, to improve wind turbine performance. The planar member may be a stall fence provided towards the blade root end, further acting to divert airflow towards the root end of the blade to prevent separation of attached airflow. Additionally or alternatively, the planar member may be a flow diverter provided towards the blade tip end, to increase airflow in the tip region for increased performance and/or to disrupt the formation of tip vortices. 1. A wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft , said rotor comprising a hub , from which the blade extends substantially in a radial direction when mounted to the hub , the blade having a longitudinal direction with a tip end and a root end and a transverse direction , the blade further comprising:a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord line having a chord length extending there between, the chord line transverse to said longitudinal direction, the profiled contour, when being impacted by an incident air-flow, generating a lift,wherein the wind turbine further comprises first and second flow guide members provided on a surface of said wind turbine blade, wherein said first and second flow guide members extend in a direction substantially transverse to the longitudinal direction of the blade, said first and second flow guide members defining a flow channel between said leading edge and said trailing edge, said flow channel having a first end located towards said leading edge and a second end located towards said trailing edge,wherein at least a portion of one of said first and second flow guide members extends along the transverse direction of ...

A blade for a wind turbine and a method for manufacturing a blade for a wind turbine

A blade for a wind turbine defines an airfoil with a leading edge section and a trailing edge section, notably a flat-back trailing edge. A rounded connecting section interconnects a pressure side section of the airfoil and the trailing edge section. The rounded connecting section attaches to the pressure side section at a transition point, in which the pressure side section's tangent does not coincide with the rounded connecting section's tangent, so that the outer surface of the airfoil has a sharp corner at said transition point. The truncated radius, i.e. geometrical discontinuity, thus formed at the transition between the pressure side section and the trailing edge section increases the aerodynamically effective surface of the pressure side and enables forced and hence controlled flow separation without compromising ease of manufacture and structural stability of a fibre-reinforced structure making up a shell of the blade.

WIND TURBINE NOISE REDUCTION WITH ACOUSTICALLY ABSORBENT SERRATIONS

A wind turbine blade includes a trailing edge including a radially inboard portion and a radially outboard portion opposite the radially inboard portion and a retrofit system coupled to the trailing edge. The retrofit system includes a mounting structure for coupling the retrofit system to the trailing edge and at least one serrated portion extending at least partially along the mounting structure. The serrated portion includes at least one substantially acoustically absorbent material. A method for reducing noise emission from a wind turbine blade including a trailing edge and retrofit system is also disclosed. 1. A retrofit system for a wind turbine blade , the wind turbine blade including a trailing edge , the retrofit system comprising:a mounting structure for coupling the system to the trailing edge, wherein the mounting structure comprises a substantially rectangular plate; andat least one serrated portion extending at least partially along the mounting structure, the at least one serrated portion comprising a base portion and a plurality of tip portions defining a serrated edge, the at least one serrated portion extending from the base portion to the plurality of tip portions in a direction away from the trailing edge, the at least one serrated portion comprising at least one substantially acoustically absorbent material.2. The retrofit system of claim 1 , wherein the at least one substantially acoustically absorbent material increases an acoustic absorption coefficient of the wind turbine blade.3. The retrofit system of claim 2 , wherein the at least one substantially acoustically absorbent material is at least one of structural foam claim 2 , a series of three dimensional structures including a plurality of pores defined therein formed by additive manufacturing claim 2 , a self-supporting shell with an epoxy matrix claim 2 , and a micro-perforated metal.4. The retrofit system of claim 1 , wherein the at least one serrated portion comprises a series of ...

Psp wind-powered generator comprising blades at dihedral angles

The invention relates to a wind-powered generator comprising blades at dihedral angles (PSP), characterised by an aerodynamic, semi-flat blade having, on one if its sides, a bent section measuring approximately a quarter of the total width of the blade and forming a dihedral angle of less than 30°, the interior space of which captures the kinetic power of the wind impacting on the blade, thereby generating a powerful rotary movement in that direction. The blades form a diametrical set of two blades generating a strong and effective rotary movement at a 90° angle to the linear movement of the wind. The invention can be used to create: a generator comprising one single set of two blades; a generator comprising two sets of blades moving in one direction and generating an aggregate output; and/or a generator comprising two sets of blades rotating in opposite directions that generate twice the output of a set of blades rotating in one direction, with one single fixed and mobile structure, one single generator and one single wind mass.

AIRFOIL MODIFIERS FOR WIND TURBINE ROTOR BLADES

In one aspect, a rotor blade for a wind turbine is disclosed. The rotor blade may include a body extending between a blade root and a blade tip. The body may define a pressure side and a suction side extending between a leading edge and a trailing edge. In addition, the body may define a chord line extending between the leading and trailing edges. The rotor blade may also include an airfoil modifier coupled to at least one of the pressure side or the suction side of the body. The airfoil modifier may define an end surface disposed adjacent to the trailing edge. At least a portion of the end surface may extend at a non-perpendicular angle relative to the chord. 1. A rotor blade for a wind turbine , the rotor blade comprising:a body extending between a blade root and a blade tip, the body defining a pressure side and a suction side extending between a leading edge and a trailing edge, the body further defining a chord line extending between the leading and trailing edges;an airfoil modifier coupled to at least one of the pressure side or the suction side of the body, the airfoil modifier defining an end surface disposed adjacent to the trailing edge, at least a portion of the end surface extending at a non-perpendicular angle relative to the chord line.2. The rotor blade of claim 1 , wherein the end surface defines a planar profile.3. The rotor blade of claim 2 , wherein the non-perpendicular angle is greater than 90 degrees.4. The rotor blade of claim 2 , wherein the non-perpendicular angle is less than 90 degrees.5. The rotor blade of claim 1 , wherein the end surface defines a non-planar profile.6. The rotor blade of claim 5 , wherein the end surface defines a concave shape.7. The rotor blade of claim 5 , wherein the end surface defines a convex shape.8. The rotor blade of claim 1 , wherein the airfoil modifier is coupled to the pressure side.9. The rotor blade of claim 1 , wherein the airfoil modifier is coupled to the suction side.10. The rotor blade of claim 1 , ...

WIND TURBINE BLADE AND METHOD OF CONTROLLING THE LIFT OF SUCH A BLADE

Wind turbine blade comprising a shape modifiable airfoil section that extends both chordwise and spanwise and has a not modified default shape, a conduit that extends from the inside of the blade towards the outside of the blade, and an outer part comprising a flow regulator that is located at the shape modifiable airfoil section and blocks the conduit when the shape modifiable airfoil section presents its default shape, and does not block the conduit when the shape modifiable airfoil section presents a modified shape. In the latter situation the conduit is opened to the outside of the blade and a device for exchanging a fluid between the inside and the outside of the blade is thus defined. 1. A wind turbine blade comprising:a shape modifiable airfoil section that extends both chordwise and spanwise and has an undeformed default shape,a conduit that extends from an inside of the blade to an outside surface of the blade, andan outer part of the conduit comprising a flow regulator located at the shape modifiable airfoil section, the flow regulator being suited to block the conduit when the shape modifiable airfoil section presents the default shape, and not suited to block the conduit when the shape modifiable airfoil section presents a deformed shape, thereby allowing an air exchange between the inside and the outside of the blade.2. The wind turbine blade according to claim 1 , wherein the outer part comprises a portion made of a deformable material.3. The wind turbine blade according to claim 1 ,further comprising a plurality of outer parts distributed in a scattered fashion over the blade.4. The wind turbine blade according to claim 1 , wherein the conduit extends from a first outside surface of the blade to a second outside surface of the blade.5. The wind turbine blade according to claim 4 , wherein the second outside surface of the blade is located outside of the shape modifiable airfoil section.6. The wind turbine blade according to claim 1 , further ...

Wind turbine blade

A blade for a rotor of a wind turbine having a longitudinal direction with a tip end and a root end and a transverse direction, comprising: a profiled contour that when impacted by an incident airflow, generates a lift, wherein the profiled contour is divided into: a root region having a substantially circular or elliptical profile closest to the hub, an airfoil region having a lift-generating profile furthest away from the hub, and a transition region between the root region and the airfoil region, the transition region having a profile gradually changing in the radial direction to the lift-generating profile of the airfoil region, and further comprising a shoulder, wherein the shoulder is located in the airfoil region, thus yielding a slender and relative thick blade maximizing energy output, reducing bearing loads and facilitating transportation.

Blade insert for a wind turbine rotor blade

A blade insert for coupling a first blade segment to a second blade segment is disclosed. The blade insert may generally include an aerodynamic body extending between a forward end configured to be coupled to the first blade segment and an aft end configured to be coupled to the second blade segment. The aerodynamic body may include a top side extending between a forward edge and an aft edge. The top side may define a top scarfed section at its forward edge. The aerodynamic body may further include a bottom side extending between a forward edge and an aft edge. The bottom side may define a bottom scarfed section at its forward edge. Additionally, at least a portion of the forward edge of the top side may be configured to be offset relative to the forward edge of the bottom side.

WIND TURBINE BLADE

A wind turbine blade is described having noise reduction features. The blade has a plurality of projecting elements provided at the blade trailing edge to reduce the scattering noise produced during operation of the blade. The blade further comprises a fluid injection system which can inject a fluid into the turbulent airflow at the trailing edge of the blade, to absorb some of the turbulent kinetic energy at the trailing edge and accordingly further reduce the levels of output noise produced by the blade. In a further aspect, the fluid injection system may be adjustable to inject fluid in an upstream direction, i.e. against the oncoming airflow, in order to provide an increased absorption of turbulent kinetic energy from the incident airflow, and accordingly to provide improved noise-reduction characteristics. 1. A wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft , the rotor comprising a hub , from which the wind turbine blade extends substantially in a radial direction when mounted to the hub , the wind turbine blade extending in a longitudinal direction parallel to a longitudinal axis and having a tip end and a root end ,the wind turbine blade further comprising a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord having a chord length extending therebetween, the profiled contour, when being impacted by an incident airflow, generating a lift,wherein the wind turbine blade further comprises at least a first array of projecting flow modulation elements provided at the trailing edge of the contour, said flow modulation elements projecting in a direction substantially away from the leading edge of the contour, said elements operable to reduce noise generated by operation of the blade by modulation of the airflow at the trailing edge of the contour,wherein the wind turbine blade further comprises at least one fluid injection device, the fluid injection ...

WIND TURBINE BLADE PROVIDED WITH SURFACE MOUNTED DEVICE

A wind turbine blade () for a rotor of a wind turbine () having a substantially horizontal rotor shaft is described. A surface mounted device () is attached to a surface of the wind turbine blade (). The surface mounted device () is attached to the surface of the wind turbine blade () via at least a first attachment part (′), which is connected to a part of the surface mounted device (). The attachment part (′) comprises a flexible housing () that forms a cavity () between at least the housing () and the surface of the wind turbine blade (). The cavity () is filled with an adhesive that provides an adhesive bonding to the surface of the wind turbine blade (). 1106102810610810610141610. A wind turbine blade ( , ) for a rotor of a wind turbine () having a substantially horizontal rotor shaft , said rotor comprising a hub () , from which the wind turbine blade ( , ) extends substantially in a radial direction when mounted to the hub () , the wind turbine blade ( , ) having a longitudinal direction (r) with a tip end () and a root end () and a transverse direction , the wind turbine blade () further comprising:{'b': 40', '42', '50', '18', '20, 'a profiled contour (, , ) including a pressure side and a suction side, as well as a leading edge () and a trailing edge () with a chord having a chord length extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift, wherein'}{'b': 70', '70', '170', '270', '370', '470', '570', '670', '770', '10, 'a surface mounted device (, ′, , , , , , , ) is attached to a surface of the wind turbine blade (), wherein'}{'b': 70', '70', '170', '270', '370', '470', '570', '670', '770', '10', '610', '77', '77', '70', '70', '170', '270', '370', '470', '570', '670', '770, 'the surface mounted device (, ′, , , , , , , ) is attached to the surface of the wind turbine blade (, ) via at least a first attachment part (, ′), which is connected to a part of the surface mounted device (, ′, , , , , , , ), ...

Rotor blade for a wind turbine and wind turbine

A rotor blade for a wind turbine, to a wind turbine comprising a tower, a nacelle and a rotor, and also to a wind farm. The rotor blade comprises an inner blade section that extends from a rotor blade root in the longitudinal direction of the rotor blade and a trailing edge segment, arranged on the inner blade section, for increasing the profile depth of the rotor blade along a section in the longitudinal direction of the rotor blade. The rotor blade has a pressure-side surface and a suction-side surface, which are each formed in certain regions by parts of the inner blade section and of the trailing edge segment. One or more air outlets and air inlets extending substantially in the longitudinal direction of the rotor blade are formed on both the pressure-side surface and the suction-side surface of the rotor blade, in the region of the trailing edge segment, said air outlets and air inlets being interconnected in a fluid-guiding manner. At least one covering element overlapping the at least one air outlet and by means of which the air outlet can be closed or opened is arranged on the suction-side surface.

HIGH TORQUE WIND TURBINE BLADE, TURBINE, AND ASSOCIATED SYSTEMS AND METHODS

A blade for a wind turbine can include an elongated and curved sheet having a curved root, a curved tip, a leading edge, and a trailing edge. The root and the tip can be rotated relative to each other such that the blade is twisted along its length. The root can include an edge having curved projections, the curved projections being distributed along a curvature of the root. A wind turbine can include a mounting element and a plurality of turbine blades. Each turbine blade can be attached to the mounting element closer to the trailing edge than to the leading edge such that an intersection of the leading edge and the root projects upstream from the wind turbine. A wind turbine generator assembly for converting wind into electrical energy can include a wind turbine and a generator. In addition, a support structure can support the wind turbine and generator. 1. A wind turbine generator assembly for converting wind into electrical energy , the assembly comprisinga wind turbine; anda generator configured to receive rotational force from the wind turbine and convert the rotational force to electrical energy; whereinthe wind turbine comprises a hub and a plurality of turbine blades attached to the hub; and wherein a root positioned adjacent to the hub,', 'a tip positioned opposite from the root, and', 'a leading edge spanning between the root and the tip along a length of the blade, the leading edge having a length greater than a length of the root and a length of the tip, the leading edge positioned to face an incoming wind stream;, 'at least one of the turbine blades comprises'}wherein the leading edge comprises a plurality of curved projections positioned to extend toward the incoming wind stream.2. The wind turbine generator assembly of wherein each curved projection of the plurality of curved projections has a relative amplitude with respect to a chord length of the at least one blade that is different from a relative amplitude of the other curved projections.3. The ...

Rotor blade assembly having vortex generators for wind turbine

Rotor blade assemblies for wind turbines are provided. In one embodiment, a rotor blade assembly includes a rotor blade, and a plurality of vortex generators configured on at least one of a suction side or a pressure side and disposed within an inboard area of the rotor blade. The plurality of vortex generators include a row of vortex generators extending in a generally span-wise direction, the row comprising a first portion of vortex generators and a second portion of vortex generators, the second portion of vortex generators spaced apart from the first portion of vortex generators in the span-wise direction. Each first portion vortex generator is disposed at a first chord-wise location, and each second portion vortex generator is disposed at a second chord-wise location different from the first chord-wise location.

REAR CASING, ROTOR BLADE WITH REAR CASING, AND A WIND TURBINE THAT COMPRISES SUCH A ROTOR BLADE

The invention concerns a rear box section for a rotor blade, in particular of a wind power installation, comprising a pressure-side surface, a suction-side surface, a trailing edge separating the pressure-side and suction-side surfaces, and a connecting side which is opposite to the trailing edge and which is adapted for mounting to a corresponding connecting surface of the rotor blade. The invention concerns in particular a rear box section which is sub-divided into a foot segment having the connecting side and one or more head segments which have the trailing edge and which can be coupled to the foot segment. The invention also concerns a rotor blade for a wind power installation, and a wind power installation. 1. A rear box section for a rotor blade of a wind power installation , the rear box section comprising:a head segment having a pressure-side surface, a suction-side surface, a trailing edge separating the pressure-side and suction-side surfaces, and a first connecting side opposing the trailing edges; anda foot segment having a second connecting side that is adapted for mounting to a corresponding connecting surface of the rotor blade and a third connecting side configured to be coupled to the first connecting side of the first head segment.2. A The rear box section according to wherein the head segment includes a plurality of head segments claim 1 , and the third connecting side of the foot segment has for each of the plurality of head segments a separate sub-division plane at which each of plurality of the head segments can be coupled to the foot segment.3. The rear box section according to wherein the head segment includes a plurality of head segments claim 1 , and the second connecting side of the foot segment has for the plurality of head segments a continuous sub-division plane at which the respective head segments can be coupled to the foot segment.4. The rear box section according to wherein the sub-division planes are so arranged that the maximum ...

SWALLOW TAIL AIRFOIL

Aerodynamic element having a cross section in an airflow direction with a suction side surface, a pressure side surface, and a trailing edge extending between the suction side surface and the pressure side surface. The aerodynamic element further comprises an extension body attached to the trailing edge near the suction side surface of the aerodynamic element. A top surface of the extension body is flush with the suction side surface. The aerodynamic element () is e.g. applied in a rotor blade for a wind turbine. 1. An aerodynamic element having a cross section in an airflow direction with a suction side surface , a pressure side surface , and a trailing edge of a flat-back airfoil type extending between the suction side surface and the pressure side surface ,wherein the aerodynamic element further comprises an extension body attached to the trailing edge near the suction side surface of the aerodynamic element,wherein the extension body has a top surface flush with the suction side surface,2. The aerodynamic element of claim 1 , wherein the extension body in combination with the trailing edge forms a non-symmetrical downstream facing profile surface.3. The aerodynamic element of claim 1 , wherein a first tangent associated with the suction side surface and a second tangent associated with the pressure side surface intersect at an intersection length downstream of the flat-back airfoil type trailing edge claim 1 , andwherein a length l of the extension body extending from the trailing edge in airflow direction is less than the intersection length.4. The aerodynamic element of claim 1 , wherein the flat-back airfoil type trailing edge has an end thickness T claim 1 , and wherein a length l of the extension body in airflow direction is less than the end thickness T.5. The aerodynamic element of claim 1 , wherein a length l of the extension body in airflow direction fulfils the equation{'br': None, 'i': 'l≤T', 'tan α,'}wherein T is an end thickness of the trailing edge ...

WIND TURBINE BLADE HAVING A TRAILING EDGE FLAP

A wind turbine blade includes a trailing edge flap having a flap part protruding from the trailing edge on the pressure side of the blade. The flap part has a first section and a second section each having an upstream surface arranged to face an oncoming airflow in use. The first section extends from the trailing edge and has a proximal end and a distal end in cross-section. The proximal end is located at or near the trailing edge and the distal end is spaced apart from the trailing edge. The first section is oriented such that an obtuse angle is defined between the upstream surface of the first section and a plane that extends parallel to the local chordal plane and intersects the proximal end of the first section. The second section is oriented such that the upstream surfaces of the first and second sections together define a concave profile in cross section. 1. A wind turbine blade extending in a spanwise direction between a root end and a tip end , and extending in a chordwise direction between a leading edge and a trailing edge , the blade having a pressure side and a suction side , and a trailing edge flap , the trailing edge flap comprising:a flap part protruding from the trailing edge on the pressure side of the blade, the flap part having a first section and a second section each having an upstream surface arranged to face an oncoming airflow in use;the first section extending from the trailing edge and having a proximal end and a distal end in cross-section, with the proximal end being located at or near the trailing edge and the distal end being spaced apart from the trailing edge;wherein the first section is oriented such that an obtuse angle is defined between the upstream surface of the first section and a plane that extends parallel to the local chordal plane and intersects the proximal end of the first section; andthe second section is oriented such that the upstream surfaces of the first and second sections together define a concave profile in cross ...

Wind Turbine Blade with Improved Glue Joints and Related Method

The disclosure presents a wind turbine blade and a method of manufacturing a wind turbine blade, wherein the wind turbine blade is manufactured as a composite structure comprising a reinforcement material embedded in a polymer matrix, the method comprising: providing a first blade mould with a first blade shell part having a leading edge, a trailing edge, and a first leading edge glue surface at the leading edge, the first blade mould comprising a first leading edge flange; providing a second blade mould with a second blade shell part having a leading edge, a trailing edge, and a second leading edge glue surface at the leading edge, the second blade mould comprising a second leading edge flange; applying glue to a leading edge glue surface; providing one or more leading edge spacer elements at a leading edge flange; arranging the second blade mould on the first blade mould, such that the one or more leading edge spacer elements are arranged between the first leading edge flange and the second leading edge flange; applying a pressure to the second blade shell part; and curing the glue. 110. A method of manufacturing a wind turbine blade () , wherein the wind turbine blade is manufactured as a composite structure comprising a reinforcement material embedded in a polymer matrix , the method comprising:{'b': 70', '72', '74', '76', '74', '70', '80, 'providing a first blade mould () with a first blade shell part () having a leading edge (), a trailing edge, and a first leading edge glue surface () at the leading edge (), the first blade mould () comprising a first leading edge flange ();'}{'b': 82', '84', '86', '87', '86', '82', '89, 'providing a second blade mould () with a second blade shell part () having a leading edge (), a trailing edge, and a second leading edge glue surface () at the leading edge (), the second blade mould () comprising a second leading edge flange ();'}{'b': 90', '76', '87, 'applying glue () to a leading edge glue surface (; );'}{'b': 92', '80', ...

WIND TURBINE

There is provided a wind power installation rotor blade comprising a suction side, a pressure side, a region near the root, a rotor blade tip a rotor blade leading edge and a rotor blade trailing edge. The rotor blade further has a plurality of stagnation points along the length of the rotor blade, which together can form a stagnation point line. A plurality of vortex generators is provided in the region of the stagnation point line. The stagnation point line is disposed on the underside (generally referred to as the pressure side) of the rotor blade. 1. A wind power installation rotor blade comprising:a rotor blade leading edge, a rotor blade trailing edge, a rotor blade root for connection to a wind power installation, and a rotor blade tip;a suction side and a pressure side;a stagnation point line along a longitudinal direction of the rotor blade from the rotor blade root to the rotor blade at a predetermined angle of incidence of the rotor blade, wherein the stagnation point line is on the pressure side; anda plurality of vortex generators in a region of the stagnation point line.2. The rotor blade according to wherein the region that includes the plurality of vortex generators is greater than 50% of the length of the rotor blade along the longitudinal direction.3. The rotor blade according to wherein each of the plurality of vortex generators has a shape that is circular claim 1 , oval or arrow-shaped in plan view.4. The rotor blade according to wherein each of the plurality of vortex generators has a diameter that is less than 100 mm.5. The rotor blade according to wherein each of the plurality of vortex generators has a height that corresponds at a maximum to one-quarter of the diameter of the vortex generators.6. The rotor blade according to wherein each of the plurality of vortex generators has a shape that corresponds to a disk of substantially constant thickness or a portion of a sphere with a round basic shape.7. The rotor blade according to wherein a ...

TRAILING EDGE ASSEMBLY

Provided is a trailing edge assembly of a wind turbine rotor blade, which includes a mounting portion; a flap portion flexibly connected to the mounting portion so that a flap angle subtended between the mounting portion and the flap portion can be altered; a volume adjustable chamber arranged between the mounting portion and the flap portion and realised to alter its volume between a minimum volume associated with a minimum flap angle and a maximum volume associated with a maximum flap angle; and at least one tube to face into an airflow passing over the airfoil region of the rotor blade, and an inner orifice arranged to face into the interior of the volume adjustable chamber such that an airflow between the outer orifice and the inner orifice alters the volume of the volume adjustable chamber. Embodiments of the invention further describe a wind turbine rotor blade. 1. A trailing edge assembly of a wind turbine rotor blade , which trailing edge assembly comprisesa mounting portion shaped for mounting to an airfoil region of the rotor blade;a flap portion flexibly connected to the mounting portion to allow alteration of a flap angle subtended between the mounting portion and the flap portion;a volume adjustable chamber arranged between the mounting portion and the flap portion and realised to alter its volume between a minimum volume associated with a minimum flap angle and a maximum volume associated with a maximum flap angle;at least one tube comprising an outer orifice arranged to face into an airflow passing over the airfoil region of the rotor blade, and an inner orifice arranged to face into the interior of the volume adjustable chamber such that an airflow between the outer orifice and the inner orifice alters the volume of the volume adjustable chamber.2. The trailing edge assembly according to claim 1 , wherein the mounting portion) is shaped for mounting to the pressure side of the rotor blade airfoil region.3. The trailing edge assembly according to ...

A DE-ICING SYSTEM FOR A WIND TURBINE BLADE

A wind turbine blade is described having a de-icing system which is arranged to heat at least a portion of the leading edge of the wind turbine blade, to prevent the formation of ice on the blade, or to remove any existing surface ice. The de-icing system comprises insulated flow channels which are arranged to circulate a heated fluid from a heating element to the tip end of the blade, and to de-ice the blade leading edge starting from the tip end towards the root end of the blade. The de-icing system is arranged to operate in the outboard portion of the blade, where the de-icing effect provides the most benefits to turbine operation. Further features of the de-icing system include an improved mounting arrangement of the de-icing system, an improved tip end configuration of the de-icing system, and providing portions of the de-icing system as double-walled inflatable insulating tubes. 120-. (canceled)2110161418201416. A wind turbine blade () having a blade de-icing system , the wind turbine blade comprising a root end () and a tip end () , a leading edge () and a trailing edge () , the blade having an outboard portion provided towards said tip () end and an inboard portion provided towards said root end () , the blade de-icing system arranged to convey a heated fluid to provide heat to portions of the wind turbine blade , wherein the blade de-icing system comprises:{'b': 70', '16', '14, 'an insulated outflow channel () flowing from said root () end to a location adjacent said tip () end;'}{'b': 72', '14', '18, 'a heating channel () in the outboard portion of the blade, the heating channel flowing from said location adjacent said tip end () along the leading edge () of the blade in the outboard portion of blade; and'}{'b': 78', '78, 'an insulated return channel () in the inboard portion of the blade, the insulated return channel () extending from the root end side of the heating channel to the root end of the blade,'}{'b': 16', '70', '14', '14', '72', '78', '78', '16 ...

WIND TURBINE BLADE AND METHODS OF OPERATING IT

Wind turbine blade comprising a spar, a plurality of ribs rotatably mounted on said spar, and a rotating means adapted to rotate at least two consecutive ribs independently of each other. The blade can thus be operated so as to rotate at least two consecutive ribs independently of each other, although it is also possible to jointly rotate all the ribs. 1. A wind turbine blade comprising:a spar,a plurality of ribs rotatably mounted on the spar,a flexible cover supported by the spar and the ribs, anda rotating means comprising an actuator for each rib, wherein each actuator can independently actuate a single rib.23-. (canceled)4. The wind turbine blade according to claim 1 , wherein the rotating means comprises a plurality of gears.52. The wind turbine blade according to claim claim 1 , wherein at least one actuator is engaged to a corresponding rib by means of a bevel gear.6. The wind turbine blade according to claim 1 , wherein the spar is tubular.7. The wind turbine blade according to claim 1 , wherein the spar has a rectangular cross-section.8. The wind turbine blade according to claim 1 , wherein the spar comprises at least two longitudinal parts.9. (canceled)10. The wind turbine blade according to claim 1 , wherein the flexible cover is fastened to at least some ribs.11. The wind turbine blade according to claim 1 , wherein the flexible cover comprises at least two parts.12. The wind turbine blade according to claim 1 , comprising a stiffening element arranged at a trailing edge region of the blade.13. The wind turbine blade according to claim 1 , wherein the flexible cover comprises a first portion corresponding to a pressure side of the blade and a second portion corresponding to a suction side of the blade claim 1 , such that the first and second portions are merged at a leading edge region of the blade and are removably attached to each other at a trailing edge region of the blade.14. A wind turbine comprising a blade according to .15. A method of operating ...

Propeller assembly

A propeller blade spanning radially from a root to a tip and spanning axially from a leading edge to a trailing edge spaced from the leading edge forming an airfoil therebetween where a sweep line can be defined as a spline fitted through points which are positioned along the chord line. The propeller blade having at least one spline defining the leading edge or trailing edge.

WIND TURMINE BLADE

Wind turbine blades comprising one or more deformable trailing edge sections having a multistable sheet comprising a plurality of bistable elements, each bistable element having two stable positions, wherein the multistable sheet is attached in a cantilever manner to a structural portion of the blade and extends in a chordwise direction, and the multistable sheet is connected to a skin of the blade such that upon changing one or more bistable elements from one stable position to the other stable position a shape of the trailing edge section changes. The application further relates to wind turbines comprising such blades and methods of controlling loads on the blades. 1. A wind turbine blade comprising one or more deformable trailing edge sections having a multistable sheet comprising a plurality of bistable elements , each bistable element having two stable positions , wherein the multistable sheet is attached in a cantilever manner to a structural portion of the blade and extends in a chordwise direction , and the multistable sheet is connected to a skin of the blade such that upon changing one or more bistable elements from one stable position to the other stable position a shape of the trailing edge section changes.2. A wind turbine blade according to claim 1 , wherein the multistable sheet is a dimpled sheet and the bistable elements are dimples provided along a surface of the sheet claim 1 , wherein each dimple has a first stable position protruding from a first side of the sheet surface and a second stable position protruding from the other side of the sheet surface.3. A wind turbine blade according to claim 1 , further comprising a multiplexer connectable to a power supply and adapted to supply energy to the bistable elements.4. A wind turbine blade according to claim 1 , wherein the bistable elements are or comprise piezoelectric elements.5. A wind turbine blade according to claim 1 , further comprising a pneumatic or oil-hydraulic system adapted to change ...

ROTOR BLADE OF A WIND TURBINE AND METHOD FOR DESIGNING SAME

A two-part or multi-part rotor blade and also to a method which is associated with it. The rotor blade is split into at least one rotor blade component which is close to the hub and one rotor blade component which is remote from the hub at a separation point in the longitudinal direction, wherein the rotor blade component which is close to the hub and the rotor blade component which is remote from the hub can be connected at the separation point for operation of the wind turbine. A ratio of profile thickness to profile depth, called relative thickness, at the separation point lies within a range of from 0.4 to 0.5. An improved two-part or multi-part rotor blade in spite of the unexpectedly high relative thicknesses. 1. A rotor blade of a wind turbine , comprising:a first rotor blade component that is close to a hub when mounted on a wind turbine, and a second rotor blade component that is remote from the hub, wherein the first and second rotor blade components are separable at a separation point in a longitudinal direction of the rotor blade,wherein a ratio of a profile thickness to a profile depth, called relative thickness, at the separation point is within a range from 0.4 to 0.5.2. The rotor blade as claimed in claim 1 , wherein:a sum of lengths of the first rotor blade component and the second rotor blade component provides a total blade length of the rotor blade, andthe separation point is located in a region from 25% to 38% of the total blade length as referenced from the hub.3. The rotor blade as claimed in claim 1 , wherein an absolute thickness of the rotor blade at the separation point is at least 1.7 meters.4. The rotor blade as claimed in claim 1 , wherein a mean relative thickness between a first position of a relative blade length and a second position of a relative blade length is defined as a ratio of the definite integral of the relative thickness from the first position to the second position to a distance between the first position and the second ...

Wind Turbine Blade with Pocket-Shaped Drag Portion, Reversed-Orientation Airfoil Trailing Same, and Auxiliary Blade Supports

A unique wind turbine blade features a drag element having a concave surface for impingement of airflow thereagainst to create a drag force, and an airfoil having a rounded edge and an opposing sharper edge. The sharp edge points toward the drag element from a side thereof to which the concave surface faces, and the rounded edge points away from the drag element on the same side thereof as the sharp edge such that the sharp edge leads the rounded edge under movement of the drag element by the drag force. A unique wind turbine features an auxiliary support bearing disposed at a spaced axial distance from the rotor, and an auxiliary blade support connection spanning from the auxiliary bearing to the blade at a distance spaced axially from where a rotor blade support connects to said blade. 1. A wind turbine blade comprising:a drag element having a concave surface for impingement of airflow thereagainst to create a drag force;an airfoil having a rounded edge and an opposing sharper edge, the sharp edge pointing toward the drag element from a side thereof to which the concave surface faces and the rounded edge pointing away from the drag element on the same side thereof as the sharp edge such that the sharp edge leads the rounded edge under movement of the drag element by the drag force.2. The blade of wherein the sharper edge points toward a location on the concave surface of the drag element that is offset to one side of an axis that bisects a curvature profile of the concave surface.3. The blade of wherein the airfoil is an asymmetric airfoil having a first surface that spans from the rounded edge to the sharper edge and has a curvature of greater camber than a second surface spanning from the rounded edge to the sharper edge claim 2 , and wherein the second surface faces toward the same side of the axis as the location to which the sharper edge of the airfoil points.4. The blade of wherein a mean camber line of the airfoil claim 1 , where said mean camber line ...

Flexible Extension for Wind Turbine Rotor Blades

The present disclosure is directed to a rotor blade assembly for a wind turbine. The rotor blade assembly includes a rotor blade having surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge extending between a blade tip and a blade root. Further, the rotor blade assembly includes a flexible extension having a first end and a second end. More specifically, the first end is mounted to a surface of the rotor blade and the second end is free. As such, during operation of the wind turbine, the flexible extension passively adjusts with a changing angle of attack of the rotor blade, thereby reducing variations in blade loading. 1. A rotor blade assembly for a wind turbine , comprising:a rotor blade having surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge extending between a blade tip and a blade root; and,a flexible extension comprising a first end and a second end, the first end being mounted to a surface of the rotor blade, the second end being free,wherein, during operation of the wind turbine, the flexible extension passively adjusts with a changing angle of attack of the rotor blade, thereby reducing variations in blade loading.2. The rotor blade assembly of claim 1 , wherein the extension comprises an extension plate.3. The rotor blade assembly of claim 2 , wherein the extension plate comprises one or more openings configured to increase flexibility thereof.4. The rotor blade assembly of claim 2 , further comprising a gurney flap extending from the extension plate at the second end.5. The rotor blade assembly of claim 2 , further comprising one or more gurney wings extending from the extension plate.6. The rotor blade assembly of claim 5 , wherein the one or more gurney wings are centrally supported by a support member secured to the extension plate claim 5 , the one or more gurney wings configured to flex towards each other with the changing angle of attack of the rotor blade.7. The rotor blade ...

WIND TURBINE BLADE HAVING A TENSILE-ONLY STIFFENER FOR PASSIVE CONTROL OF FLAP MOVEMENT

A wind turbine blade, including: an airfoil () having a pressure side (), a suction side (), and a trailing edge portion () deflectable from a trailing edge neutral position, and a tensile-only stiffener () secured to the trailing edge portion and having a tension center disposed toward the pressure side of and at a distance () from an elastic axis () of the airfoil when the airfoil is in an airfoil neutral position. 1. A wind turbine blade , comprising:an airfoil comprising a pressure side, a suction side, and a trailing edge portion that is deflectable from a trailing edge neutral position; anda tensile-only stiffener secured to the trailing edge portion and comprising a tension center disposed toward the pressure side of and at a distance from an elastic axis of the airfoil when the airfoil is in an airfoil neutral position,wherein deflection of the airfoil from the airfoil neutral position toward the pressure side urges the trailing edge portion from the trailing edge neutral position toward the suction side.2. The wind turbine blade of claim 1 , wherein the airfoil is configured such that when the airfoil deforms flap-wise from the airfoil neutral position toward the pressure side the tensile-only stiffener does not contribute to a deflection of the trailing edge portion toward the suction side.3. The wind turbine blade of claim 1 , wherein the trailing edge portion is elastically deflectable with respect to a leading edge portion of the airfoil.4. The wind turbine blade of claim 1 , the airfoil further comprising a hinge connecting the trailing edge portion to a leading portion of the airfoil claim 1 , wherein the trailing edge portion deflects by rotating about the hinge.5. The wind turbine blade of claim 1 , wherein the tensile-only stiffener comprises a non linear stiffness response.6. The wind turbine blade of claim 1 , wherein the tensile-only stiffener begins to mitigate a span-wise lengthening of the trailing edge portion only after a threshold amount ...

PROPELLER

A propeller having a means for creating fluid flow in a non-axial direction and redirecting it in an axial direction.

HIGH TORQUE WIND TURBINE BLADE, TURBINE, AND ASSOCIATED SYSTEMS AND METHODS

A blade for a wind turbine can include an elongated and curved sheet having a curved root, a curved tip, a leading edge, and a trailing edge. The root and the tip can be rotated relative to each other such that the blade is twisted along its length. The root can include an edge having curved projections, the curved projections being distributed along a curvature of the root. A wind turbine can include a mounting element and a plurality of turbine blades. Each turbine blade can be attached to the mounting element closer to the trailing edge than to the leading edge such that an intersection of the leading edge and the root projects upstream from the wind turbine. A wind turbine generator assembly for converting wind into electrical energy can include a wind turbine and a generator. In addition, a support structure can support the wind turbine and generator. 1. A kit of parts for a wind turbine generator assembly , the kit comprising:one or more wind turbine blades;a mounting element configured to support the wind turbine blades; anda generator configured to be connected to the mounting element to convert movement of the wind turbine blades to electrical energy; wherein a root, the root comprising a root edge configured to face a rotational axis of the mounting element,', 'a tip positioned opposite the root,', 'a leading edge spanning between the root and the tip along a length of the blade, and', 'a trailing edge positioned opposite the leading edge and spanning between the root and the tip along the length of the blade;', 'wherein the leading edge is longer than the root edge and the trailing edge is longer than the root edge, and', 'wherein the root edge connects the leading edge to the trailing edge, and the root edge comprises a plurality of projections distributed along the root edge between the leading edge and the trailing edge., 'at least one of the wind turbine blades comprises'}2. The kit of wherein the at least one of the wind turbine blades has a concave ...

HIGH TORQUE WIND TURBINE BLADE, TURBINE, AND ASSOCIATED SYSTEMS AND METHODS

A blade for a wind turbine can include an elongated and curved sheet having a root, a tip positioned opposite the root, a leading edge spanning between the root and the tip along a length of the blade, and a trailing edge spanning between the root and the tip opposite the leading edge. The blade can include a generally concave surface formed by curvature of the blade about a longitudinal axis. The blade can further include one or more air dams, which can be in the form of strip elements oriented transverse to the longitudinal axis and extending away from the concave surface. The air dams improve torque and efficiency of the blade. In some embodiments, an edge of the root can include a plurality of curved projections distributed thereon. A wind turbine system can include a generator and a wind turbine having a mounting element to support turbine blades. 1. A wind turbine system comprising a mounting element and a turbine blade , the turbine blade comprising:an elongated and curved sheet havinga first edge,a second edge positioned opposite the first edge,a generally concave surface between the first edge and the second edge, the concave surface being oriented to face a generally upstream direction, andone or more strip elements spanning at least a portion of a distance between the first edge and the second edge and extending upstream and away from the concave surface.2. The wind turbine system of wherein the turbine blade comprises a third edge connecting the first edge to the second edge and a fourth edge positioned opposite the third edge claim 1 , and wherein at least one of the strip elements is positioned at a distance from the third edge and the fourth edge.3. The wind turbine system of wherein the one or more strip elements comprises two or more strip elements.4. The wind turbine system of wherein the turbine blade is a first turbine blade and the wind turbine system further comprises a plurality of second turbine blades claim 1 , wherein each turbine blade ...

POSITIONING PROFILES FOR PULTRUSIONS IN WIND BLADE SPAR CAPS

Provided herein is a spar cap having a profile for guiding and receiving a shear web for wind turbine blade. Particularly, the present disclosure provides a pultruded spar cap having a bond gap feature to maintain a uniform space for distribution of bonding paste between the spar cap and shear web. Also, the spar cap is formed with locating features which guide and receive placement of the shear web. 1. A spar cap comprising:a first surface and a second surface defining a thickness therebetween;at least one locating feature disposed on the first surface;at least one bond gap feature disposed on the first surface;wherein at least one of the locating feature(s) and bond gap feature(s) is configured to engage a shear web.2. The spar cap of claim 1 , wherein the at least one locating feature is a protrusion.3. The spar cap of claim 1 , wherein the bond gap feature is a protrusion.4. The spar cap of claim 1 , wherein a bond gap feature protrudes a first distance from the first surface claim 1 , and a locating feature protrudes a second distance from the first surface.5. The spar cap of claim 1 , further comprising a plurality of locating features symmetrically disposed about a central axis of the spar cap.6. The spar cap of claim 1 , further comprising first and second locating features with a bond gap feature disposed therebetween.7. The spar cap of claim 1 , wherein the bond gap feature is configured to engage a bottom surface of the shear web.8. The spar cap of claim 1 , wherein the locating feature is configured to engage a side surface of the shear web.9. The spar cap of claim 1 , wherein the bond gap feature extends along the length of the blade span.10. The spar cap of claim 1 , wherein the locating feature extends along the length of the blade span.11. A method of forming a wind turbine blade component comprising:forming a spar cap with a first surface and a second surface defining a thickness therebetween;forming at least one locating feature on the first ...

WIND TURBINE ROTOR BLADE AND WIND TURBINE SYSTEM

A rotor blade of a wind turbine. The wind turbine rotor blade includes a blade root for connection of the rotor blade to a rotor hub, an inner blade portion which extends from the blade root in the direction of the longitudinal axis of the rotor blade, at least one trailing edge segment portion of a trailing edge segment for increasing the profile depth of the rotor blade at the blade root and at least one first and second securing portions for securing the at least one trailing edge segment portion of the trailing edge segment to the inner blade portion. The first securing portion is arranged at a predetermined spacing from the second securing portion in the direction of the longitudinal axis of the rotor blade and the at least one trailing edge segment portion of the trailing edge segment is secured to the inner blade portion in such a way that loads occurring at the inner blade portion are transmitted in point form to the at least one trailing edge segment portion of the trailing edge segment by way of the first and second securing portions. 1. A wind turbine rotor blade , comprising:a rotor blade root configured to couple the rotor blade to a rotor hub;an inner blade portion extending from the rotor blade root in a direction of a longitudinal axis of the rotor blade;a trailing edge segment having at least one trailing edge segment portion that increases a profile depth of the rotor blade in a region of the inner blade portion; andat least first and second securing portions for securing the at least one trailing edge segment portion to the inner blade portion,wherein the first securing portion is arranged at a predetermined spacing from the second securing portion in the direction of the longitudinal axis of the rotor blade, andwherein the at least one trailing edge segment portion of the trailing edge segment is secured to the inner blade portion by the at least one first and second securing portions, wherein loads occurring at the inner blade portion are ...

SYSTEM AND METHOD FOR TRAILING EDGE NOISE REDUCTION OF A WIND TURBINE BLADE

A system and method for reducing the operational noise of a blunt trailing edge of a wind turbine blade is described. The system involves increasing the trailing edge solid angle at the blade trailing edge by providing a wedge element or projection adjacent the trailing edge of the blade, the wedge element acting to provide improved mixing of the suction side and pressure side flows at the blunt trailing edge, thereby reducing the strength of vortex shedding at the trailing edge and the associated operational noise. 1. A method of reducing the trailing edge noise of a wind turbine blade having a trailing edge , the wind turbine blade having a trailing edge solid angle at said trailing edge , the method comprising the steps of:increasing the trailing edge solid angle of the trailing edge to reduce the strength of vortex shedding formed behind the trailing edge of the wind turbine blade.2. The method of claim 1 , wherein a pressure-side airflow and suction side airflow over the airfoil profile of the blade intersect in the wake of the blade trailing edge at an intersecting flow angle claim 1 , and wherein said step of increasing the trailing edge solid angle of the blade acts to increase said intersecting flow angle.3. The method of claim 1 , wherein the method comprises the steps of:providing a wind turbine blade having an airfoil profile comprising a trailing edge, said airfoil trailing edge having a trailing edge solid angle ψ1; andproviding a wedge element adjacent said trailing edge, said wedge element having a first inclined or curved or sloped surface, said first inclined surface tapered towards a first end provided at said trailing edge, said wedge element having a solid angle ψ2 at said first end,such that said wind turbine blade comprises an effective trailing edge solid angle ψ′=ψ1+ψ2.4. The method of claim 3 , wherein said wedge element is provided on the pressure side or upwind side of the airfoil profile.5. The method of claim 3 , wherein the wedge ...

Rotor blade for a wind turbine

The present invention relates to a rotor blade and to a corresponding rotor of a wind turbine with a reduced rotor diameter and increased performance. The rotor blade for a wind turbine has a wing root with a defined first diameter as an attachment to a hub, and a rotor blade end which is opposite the wing root, with a second defined diameter. Said rotor blade furthermore has a trailing edge and a leading edge with respect to the slicing direction of the rotor blade during operation. The leading edge and the trailing edge each have a curvature. The first diameter is smaller than the second diameter.

SPLITTER PLATE ARRANGEMENT FOR A SERRATED WIND TURBINE BLADE

A wind turbine blade () is described having a serrated trailing edge (). Splitter plates () are provided on the blade, to reduce operational noise. Each splitter plate () is arranged to extend at least partly into a space in between adjacent serrations. The splitter plates can be formed integrally with the serrations, or attached to existing serrations as a retrofit solution. The serrations with the splitter plates can be provided as a trailing edge panel () for attachment to the trailing edge of an existing wind turbine blade. 1101820101002010. A wind turbine blade () having a profiled contour including a pressure side and a suction side , and a leading edge () and a trailing edge () with a chord having a chord length extending therebetween , the wind turbine blade () extending in a spanwise between a root end and a tip end , the wind turbine blade comprising a plurality of serrations () provided along at least a portion of the trailing edge () of the blade () ,{'b': 10', '106', '106', '100', '100', '100, 'i': a', 'b', 'a,', 'b,', 'c, 'wherein the wind turbine blade () further comprises one or more splitter plates (, ), each splitter plate being arranged to extend at least partly into a space in between adjacent serrations (), and'}{'b': 106', '106, 'i': a,', 'b, 'wherein a thickness of the one or more splitter plates () is less than a thickness of at least port of adjacent serrations.'}2106106a,b. A wind turbine blade according to claim 1 , wherein the one or more splitter plates () are arranged between claim 1 , and preferably connected to claim 1 , adjacent serrations.3106106a,b. A wind turbine blade according to claim 2 , wherein the splitter plates () are connected between a first sidewall of a first serration and a second sidewall of a second serration.4106106a,b. A wind turbine blade according to claim 1 , wherein sidewalls of the serrations have a sidewall thickness and a plate thickness of the splitter plate () is less than the sidewall thickness.5. A wind ...

VORTEX GENERATOR FOR FASTENING TO A WIND TURBINE ROTOR BLADE

A vortex generator defines a longitudinal direction and has two fins, which are each arranged at an angle in relation to the longitudinal direction and extend over a first length in the longitudinal direction, and a base, which connects the two fins to each other, the base having a width and extending over a second length in the longitudinal direction, wherein the second length is less than the first length over the entire width of the base. 1. A vortex generator defining a longitudinal direction , the vortex generator comprising:{'b': '1', 'two fins each arranged at an angle α in relation to the longitudinal direction and extending over a first length L in the longitudinal direction;'}a base interconnecting the two fins;{'b': '2', 'said base having a width B and extending over a second length L in the longitudinal direction; and,'}{'b': 2', '1, 'said second length L being less than said first length L over the entire of said width B of said base.'}221. The vortex generator of claim 1 , wherein said second length L is not more than 70% of said first length L.3. The vortex generator of claim 1 , wherein said base has a fastening face for bonding to a surface of a wind turbine rotor blade.4. The vortex generator of claim 3 , wherein said fastening face has a curvature in the longitudinal direction.5. The vortex generator of claim 1 , wherein:said two fins each have a middle longitudinal portion with a first lower edge;said first lower edges each being connected to said base;said two fins each further having a front longitudinal portion arranged in front of said base in the longitudinal direction and a rear longitudinal portion arranged behind said base in the longitudinal direction.6. The vortex generator of claim 5 , wherein:said front longitudinal portion is arranged in a plane and has a second lower edge that projects downward over said base; and,said rear longitudinal portion is arranged in a plane and has a third lower edge that projects downward over the base.7. ...

Blade Flow Deflector

A blade assembly including a blade which includes a lift generating section with a first profiled body defined between a pressure surface and a suction surface. The first profile body extends from a first leading edge to a first trailing edge with a first chord extending form the first leading edge to the first trailing edge and being perpendicular to the radial direction. A plurality of flow deflectors extend along either the pressure surface or the suction surface within the lift generating section of the blade. The plurality of flow deflectors define a second profile body extending between a second leading edge and a second trailing edge with a second chord extending between the second leading edge and the second trailing edge. The second profile body defines an outer surface extending vertically from a base portion of the plurality of flow deflectors such that the base portion is configured to be disposed on the respective pressure surface or suction surface along which the plurality of flow deflectors extend therefrom.

Methods for Manufacturing Flatback Airfoils for Wind Turbine Rotor Blades

Methods for manufacturing a wind turbine rotor blade having a flatback airfoil configuration along at least a portion of a span of the rotor blade include providing a shell mold of the rotor blade. The method also includes laying up an outer skin layer of the rotor blade into the shell mold. Further, the method includes placing at least one pre-fabricated corner of the flatback airfoil configuration into the shell mold. The pre-fabricated corner(s) has a pointed edge. The method also includes infusing the outer skin layer with the pre-fabricated corner(s) to form the flatback airfoil configuration. 1. A method for manufacturing a wind turbine rotor blade having a flatback airfoil configuration along at least a portion of a span of the rotor blade , the method comprising:providing a shell mold of the rotor blade;laying up an outer skin layer of the rotor blade into the shell mold;placing at least one pre-fabricated corner of the flatback airfoil configuration into the shell mold, the at least one pre-fabricated corner having a pointed edge; and,infusing the outer skin layer with the at least one pre-fabricated corner to form the flatback airfoil configuration.2. The method of claim 1 , further comprising forming the at least one pre-fabricated corner via additive manufacturing.3. The method of claim 2 , wherein the at least one pre-fabricated corner is constructed of a thermoplastic material.4. The method of claim 1 , wherein the at least one pre-fabricated corner comprises at least one of a downwind corner of the flatback airfoil configuration or an upwind corner of the flatback airfoil configuration.5. The method of claim 1 , further comprising placing the at least one pre-fabricated corner of the flatback airfoil configuration into the shell mold exterior to the outer skin layer.6. The method of claim 5 , further comprising coating the at least one pre-fabricated corner of the flatback airfoil configuration with a coating material.7. The method of claim 1 , ...

Soiling shield for wind turbine blade

A soiling shield ( 80 ) affixed to a blade airfoil ( 22 ) of a wind turbine generator ( 20 ). The soiling shield ( 80 ) includes a portion extending along and spaced apart from a pressure side surface ( 88 ) of the blade airfoil ( 22 ). The soiling shield ( 80 ) is positioned not to impede an air flow stream ( 98 ) flowing to a stagnation point ( 130 ) on the pressure side surface ( 88 ) during operation of the wind turbine generator ( 20 ) at or below rated power.

Wind turbine blade with noise reducing micro boundary layer energizers

A wind turbine blade assembly includes a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge, each extending between a blade tip and a root. The rotor blade additionally defining a span and a chord. The blade assembly further includes a plurality of micro boundary layer energizers positioned on a surface of the pressure side of the rotor blade. The plurality of micro boundary layer energizers extending one of above or below a neutral plane of the rotor blade. The micro boundary layer energizers are shaped and positioned chordwise to delay separation of a boundary layer at a low angle of attack. A wind turbine including the blade assembly is additionally disclosed.

Wind Turbine Blade Provided with Surface Mounted Device

A wind turbine blade having a surface mounted device attached thereto via at least a first attachment part, which is connected to a part of the device. The first attachment part comprises an outer attachment part providing a first bonding connection between the device and the surface of the blade, wherein the first bonding connection is an elastic bond, and an inner attachment part providing a second bonding connection between the device and the surface of the blade, wherein the second bonding connection has a structural bond. The structural bond prevents the surface mounted device from creeping and the elastic bond region relieves stresses on the bond line, such as peel stresses, whereby the surface mounted device is less likely to be ripped off the surface of the blade due to forces affecting the device or the blade. 1. A wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft , said rotor comprising a hub , from which the wind turbine blade extends substantially in a radial direction when mounted to the hub , the wind turbine blade having a longitudinal direction with a tip end and a root end and a transverse direction , the wind turbine blade further comprising:a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord having a chord length extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift, whereina surface mounted device is attached to a surface of the wind turbine blade, whereinthe surface mounted device is attached to the surface of the wind turbine blade via at least a first attachment part, which is connected to a part of the surface mounted device, characterised in that an outer attachment part providing a first bonding connection between the surface mounted device and the surface of the wind turbine blade, wherein the first bonding connection is an elastic bond, and', 'an inner attachment part ...