Rear step type flame holder for rotor engine
Technical Field The invention relates to a flame stabilizing device of the rotor of the engine, the effect of the centrifugal force under the conditions of strong burns the level provide a stable ignition source for the main, ensure that under the conditions of high-speed rotation can be stable and high-efficiency combustion of the post-step flame stabilizing device of the flame stabilizer. Background Art Currently abroad have developed a kind of collection ramjet engine technology and the gas-turbine engine technology as a whole new concept engine-stamping rotor engine. This kind of engine can be divided into two categories: a kind of stamping rotor engine adopts a stamping rotor compression air, thereafter keeping pace with the combustion chamber and turbine for combustion and power; another kind is realized on the rotor in a plurality of gas compression, combustion and expansion to do work. The United States Company Ramgen against these two types of stamping rotor engine have carried out research and running test, its main purpose or the stamping rotor engine is applied to the industrial gas turbine engine to provide power, and adopting the gas fuel. In particular such 2nd stamping rotor engine, it is the stamping model, combustion chamber and tail pipe mounted on a rotor wheel rim punching on a propulsion module, in order to realize the air compression, combustion and expansion work-doing three major functions, as an independent work rotor type engine. Since the combustion system along with high-speed rotation of the rotor, to flow the inlet to the high speed, to achieve high-efficiency stable combustion, the combustion forms of organization, and fire-stabilizing technology on gas seal posed new challenges. Company Ramgen (GT-2002-30084) of the combustion chamber on the rotor by gas fuel (natural gas + hydrogen) the ignition successfully achieved, stable operation of the stamping and. In order to provide a reliable steady ignition source combustion chamber, on the rotor Ramgen companies adopt three stable flame mode: mode after the wall surface of the step, after the wall surface of the vortex generator + lighthouse-up mode and manner of the flame stabilizer. Rear step wall surface of the step is dependent on the flame stabilizer of the local low standing vortex backflow zone forming a stable ignition source, the high-temperature combustion products to the fresh incoming flow, in order to ignite the shear, but ignite the gas is very poor blending main air bleed , most directs the fuel gas directly enter the recirculating zone, result in the fuel-rich flame-out, the centrifugal effect and common concentration distribution under the action of oil and gas, the flame to the center of combustion chamber offset. The vortex generator by generating a vortex to enhance mixing and igniting gas and the mainstream of the combustion to expand the area diameter , however, mixing need to balance the strength and the stability of combustion, excessive turbulence may cause a misfire. Lighthouse stabilizer can provide flexible oil supply way, combustion intensity is obviously enhanced in the radial direction, is able to increase the flame surface area and heat release rate, the temperature distribution of the provide a more uniform, higher combustion intensity and combustion chamber pressure, but the jamming rate the lighthouse is too small, the combustion is not sufficient to expand the the area unfolds. The rotor of the combustion system on the engine with the high-speed rotation, a strong centrifugal force field, and the buoyant lift of the effect, and the distribution of the fuel will have a profound influence on the spread of the flame. 2nd kind of stamping rotor engine test study also demonstrated that, when the engine rotational speed is in 2000rpm the above, its centrifugal acceleration in 3800g the above, with the centrifugal force increases and resident time of the combustion chamber down, shear stability of the flame, only back into the region of the local residence time is beneficial to combustion, and the normal working speed reaches 4300rpm, at this moment the centrifugal acceleration up to 17600 g. Ramgen of the Company or the adoption of a flame and the propagation rate higher gas fuel, if the liquid fuel, such as aviation kerosene, etc., can affect the its combustibility will be greater. Furthermore, it is very important that the Company Ramgen flame stabilizer on the rotor does not take into consideration the time of design to the centrifugal effect of the impact of the flame propagation, this has LED to the high centrifugal acceleration of the flame of the pre-place is attached to the wall surface of the combustion, the stability of the flame, the combustion efficiency is reduced. Therefore, on the rotor of the engine, high rotor speed, air flow relative Mach number reaches 0.2 or more, of air flow in the combustion chamber has a centrifugal force field, centrifugal acceleration reaches 1000g-50000g, high flow rate and high centrifugal force field to the flame stability in the combustion chamber is very difficult, in the design of the flame stabilizer, it is necessary to fully take into account the centrifugal effect produced by the rotation of the liquid fog and the influence of the spread of the flame. In the high-level flame stabilizer Patent (Patent number: 200710176096.7) on the tower platform flame holder for an engine of the rotor, however the rotor tower platform flame holder for engine has great limitations: first of all, its relatively complex structure, high processing precision required; secondly, the adjustable range of speed of the air of the combustion chamber is narrow, the number can not be used for the case of high Ma; moreover, the pumping of fuel oil atomizing nozzle, very poor atomizing performance of the fuel, the stability of combustion, the combustion chamber, such as the stability of the narrow working range. Content of the invention The technical problem to be solved by the invention is:to overcome the deficiency of the prior art, to provide a rotor engine is backstage step-type flame stabilizer, in full consideration of the centrifugal effect to the effects of the spread of the flame at the same time the structure is simple, and at the same time, can make the combustion stability and the combustion efficiency is improved. The invention for solving the technical problems, the invention adopts the technical scheme is: the combustion chamber after the step of the flame stabilizer with outside engine case in in engine case of the combustion chamber, which comprises steps head, stair board with curvature, the head mounting seat of the step, and the step is arranged at the bottom of the oil; the oil of the centrifugal spray nozzle is installed at the end of the nozzle on the top of the mounting seat, then the stepped head is installed together, atomization by using the centrifugal nozzle injection; the head mounting seat and the step of the step is arranged at the bottom of the support seat and the head and with curvature of the step of the step board is fixed on the high-level, the step after the step of the flame stabilizer is arranged at the bottom of the seat is fixed on the rotor, so that the rear step flame stabilizer for rotation together with the rotor. The principle of this invention is as follows: combustion chamber the mainstream airflow after step separate the windward side of the head, the air flow passing through the upper part of the step and the the rear head of the step with a curvature is formed on the upper part the step board of local low standing vortex backflow zone, due to a high speed rotation of the rotor will produce the very strong centrifugal force effect, in the high position to establish a stable flame, the flame in the strong under the influence of the centrifugal force effect, subject to the action of the buoyant lift of the direction of the center of the, increased radial coverage area of the flame, to a main combustion stage provide a stable ignition source, at the same time taking into account the stabilizer wide stable working range, the structure can be simplified at the same time improve the combustion stability and combustion efficiency. Compared with the prior art, the present invention has the advantages as follows: (1) the rotor of this invention used for an engine of a step type flame stabilizer after, full use of the rotor is produced by the high-speed rotation centrifugal force effect, help high flame spreading in a radial direction, the main combustion stage for low steady ignition source provides continuous, there is no obvious blockage in the area of firearms [...] is increased, the flame surface area and heat release rate, at the same time, the structure is simple, so as to ensure combustion stability of the combustion chamber, the combustion efficiency is improved. (2) the rotor of this invention after used for an engine of a step type flame stabilizer, with curvature board arc length and the step of the step of the ratio of the height of the set can be within the range of the adjustment of the flexible, and then form the stable local low standing vortex backflow zone, thereby further providing a stable ignition source, to further ensure the combustion stability. (3) the rotor of this invention after used for an engine of a step type flame stabilizer, the integration of the oil pipe, the oil pipe is arranged on the atomizing nozzle, effectively solves the problem of sealing of the fuel. The centrifugal nozzle can be better atomized fuel, widening the stable working range of the combustion chamber. (4) in addition, the rotor of this invention after used for an engine of a step type flame stabilizer, can be by adjusting the height of the seat is arranged at the bottom of the flexible high-level change of the height of the stable point ignition source, thus can adapt to different channel of the combustion chamber. (5) in addition, the rotor of this invention after used for an engine of a step type flame stabilizer, than using the appropriate block, effectively reduce the aerodynamic loss, thereby the combustion efficiency is improved. (6) and the rotor of this invention after used for an engine of a step type flame stabilizer, the windward side of the head and the base the design of the chamfer angle, the aerodynamic resistance is reduced. Description of drawings Figure 1 is a schematic diagram of the work step type flame stabilizer of the engine the rotor; Figure 2 is a cross-sectional view of the overall structure of the step type flame stabilizer; Figure 3 is a cross-sectional view of step head structure after step type flame stabilizer; Figure 4 is a cross-sectional view of the head support structure for the step after step type flame stabilizer; Figure 5 is a cross-sectional view of the step support structure at the bottom of the post-step type flame stabilizer; Figure 6 is a cross-sectional view of oil pipe structure after step type flame stabilizer. Wherein 1 is the mainstream air flow combustion chamber, 2 is the step after the passage of the flame stabilizer, 3 is a fuel supply, 4 is a rear step stabilizer high-temperature flame, 5 is a primary combustion zone, 6 within the area of the step is, 7 is spray nozzle oil mist , 8 is a combustion chamber outer casing, 9 is the case in the combustion chamber, 10 is that a post-step type flame stabilizer, 11 is the top of the step type flame stabilizer of the distance of the distance between the side of the combustion channel, 12 is step height, 13 is provided with the arc length of the step plate of curvature, 14 is stair head , 15 stair board is provided with curvature, 16 is step the head mounting seat, 17 is a seat installed at the bottom of the step, 18 is, 19 is centrifugal nozzle, 20 is channel, 21 is step of the surface of the head, 22 is stepped head height, 23 is the windward side of the head mounting seat of the step, 24 is the head mounting seat mounting hole step, 25 is installed at the bottom of the step is installing hole, 26 is a seat installed at the bottom of the windward side of the step, 27 is the height of the step is arranged at the bottom of the seat, 28 is the rim mounting threaded hole, 29 is a nozzle mounting seat. Mode of execution In conjuction with the following details and the specific embodiment of the invention. The rear step type flame stabilizer is mounted on the rotor engine, as shown in Figure 1 ; the rotor engine, combustion indoor engine case 9 rotating together with a rotor, the rotation angle speed ω, outside engine case and combustion chamber 8 of the rotor different design the structure of the engine, can be rotatable with the rotor, can also be of the stationary; the mainstream of the combustion air 1 to flow into the combustion chamber a certain relative speed, the typical punching rotor engine in relative Mach number in the flow of 0.2 or more; the flow through the rear stepped flame stabilizer 10 the step in the head 14, the, rear step flame stabilizer for flowing through the air flow 2 the windward side of the head of the step 21 is split up and down, air flow in the upper part of the head 14 and with the curvature of the rear part of the step plate 15 forming part of the upper part of the low-speed standing vortex backflow zone 6, the low-speed area is stable, has strong steady fire capacity, of the engine to the rotor having the stable working range of function; the rear stepped flame stabilizer 10 fuel supply 3 through the rotor rim from the oil pipe 18 enters the lower port of the, because the whole combustion chamber rotating together with a rotor, the reference coordinate system is fixed on the rotor, the rim of the rotor of the high centrifugal force effect of the combustion chamber, its centrifugal acceleration to G=R ω2. Because of the presence of this high centrifugal force effect, the air flow will be generated on the pressure gradient in the radial direction, so as to produce the buoyant lift of the high-temperature fuel gas effect, the pre-ignition stage stabilizer high-temperature high-level flame 4 low position area radius inwards from a high level of spread, the radial propagation of the flame, and also from the main combustion stage fuel jetted low position area produce the cross-mixing, is conducive to igniting and stabilizing the combustion, primary combustion process in a primary combustion zone 5 completed. As shown in Figure 2, the flame stabilizer backstage step-type of the present invention 10 comprises a stepped head 14, a step board with curvature 15, step the head mounting seat 16, step a seat installed at the bottom of the oil pipe 17 and 18, 19 is a centrifugal spray nozzle. A seat installed at the bottom of the step 17 of the rear stage of the flame stabilizer 10 is fixed on the rotor rim, as shown in Figure 1. Step the head mounting seat 16 is used for fixing a step board with curvature 15 and step head 14. Will produce the centrifugal force when the rotor rotates, the head mounting seat of the step 16 and step is arranged at the bottom of the seat 17 will be subject to motion load, can be adopted in the design of the finite-element analysis method to calculate the head mounting seat of the step on the rotor 16 is arranged at the bottom of the and the step seat 17 in the stress distribution under different speed, combined with the strength of the material limit determining the structural strength of the mounting seat. Install the order of this invention: the centrifugal nozzle 19 is mounted on the oil pipe 18 nozzle mounting seat 29 on, then into the stepped head 14 so that as a whole, the oil pipe 18 is sleeved into the stepped head peaceful swivel 16 is arranged at the bottom of the and the step seat 17 of the oil passage 20, and the head mounting seat of the step 16 and step head 14 with curvature of the step plate 15 is fixed, the head mounting seat of the step 16 and step is arranged at the bottom of the seat 17 by a step the head mounting seat mounting hole 24 and the step seat installed at the bottom of the mounting hole 25 is connected and fixed to the bolt, finally through the rim of threaded mounting holes 28 the rear step flame stabilizer 10 are fixed on the rotor. Step type the flame stabilizer 10 steady fire effect of the three main factors, respectively the top of the flame stabilizer of step to the distance of the distance between the side of the combustion passage 11, the height of step 12, with the arc length of the step plate of curvature 13. The step after the step of the flame stabilizer can generates a complete in the step of the return flow zone 6, with the need to ensure the arc length of the step plate of curvature 13 and the height of the step 12 is the ratio of the 4-6. As shown in Figure 2, through the height of the step is arranged at the bottom of the seat 27 after the adjustment of the step-type flame stabilizer to the top of the side of the distance of the distance between the burning channel 11 come to regulate. The height of step 12 by adjusting the head height of the step 22 come to regulate. By changing different with curvature of the step board with the arc length of the step plate of curvature 13. As shown in Figure 4 and Figure 5, the head mounting seat of the step 16 and the step is arranged at the bottom of the seat 17 by a step between the head mounting seat mounting hole 24 and the step seat installed at the bottom of the mounting hole 25 is connected between the fixed bolt. A seat installed at the bottom of the step 17 and the rotor through the rim mounting thread hole of the wheel rim 28 for fixing. As shown in Figure 2 and Figure 6, oil pipe 18 is nozzle mounting seat 29 ; the oil 18 in the oil pipe channel device 20 internal, nozzle mounting seat 29 device in step head 14 internal, atomization by using the centrifugal nozzle 19 ; centrifugal nozzle 19 and nozzle mounting base 29 is fixedly connected with the screw thread means; step type flame stabilizer of the 10 fuel supply 3 through the oil pipe from the oil pipe 18 entering the centrifugal nozzle from the nozzle holder 19, centrifugal nozzle 19 the atomized fuel oil of the oil mist forming spray nozzle 7. Rotor engine with after step type flame stabilizer 10 than in the blocking of 0.25-0.5 in the range of, flame stabilizer for flame stabilizer refer to blocking than the upwind area of the combustion chamber the ratio of the cross-sectional area; at the same time, this invention, in order to avoid flow losses, the windward side of the head of the step 21, the windward side of the head mounting seat of the step 23, a seat installed at the bottom of the windward side of the step 26 is designed into a chamfer, help to reduce flow resistance. In cases where the specific implementation, the aviation kerosene as fuel, the blocking ratio of the step-type flame stabilizer of 0.3, the distance between the top of the step type flame stabilizer for combustion outside the channel in the casing is at the distance of 15 mm, with the arc length of the step plate of curvature and the step height ratio of the the 5 [...] 1, wherein the arc length of the step plate with a curvature of 100 mm, step height is 20 mm, the head height of the step 18 mm, a seat installed at the bottom of the stepped head height is 15 mm, the upwind-sided angle step head radius of 20 mm, the windward side of the head mounting seat of the step and the step seat installed at the bottom of the chamfer of the windward side of a radius of 5 mm. The centrifugal nozzle spray angle 60°. The invention discloses a rear-setback flame stabilizer used for a rotor engine which comprises a step head, step plates with curvature, a step head mounting base, a step bottom mounting base and a fuel tube; a centrifugal nozzle is arranged on a nozzle mounting base at the top of the fuel tube and then is arranged together with the step head, and then the atomization adopts the centrifugal nozzle for injection; a bracket formed by the step head mounting base and step bottom mounting base fixes the step head and the step plates with curvature on a high level position, and the rear-setback flame stabilizer is fixed on a rotor through the step bottom mounting base thus leading the rear-setback flame stabilizer to rotate together with the rotor. The invention can provide a stable high-level fire supply for the combustion system of the rotor engine so as to guarantee that the whole combustion system is provided with wide and stable work scope and higher combustion efficiency; simultaneously the structure of the invention is simple. 1. The rotor used for an engine of a step type flame stabilizer, characterized in that the rear step type flame stabilizer (10) is placed outside engine case of the combustion chamber (8) in engine case of the combustion chamber (9) between, the rear step type flame stabilizer (10) comprises a stepped head (14), a step board with curvature (15), step the head mounting seat (16), the step is arranged at the bottom of the seat (17) and an oil pipe (18); the centrifugal nozzle (19) is installed in the oil pipe (18) of the nozzle on the top of the mounting seat (29) is, then the stepped head (14) are installed together, atomization by using the centrifugal nozzle (19) injection; step the head mounting seat (16) and the step seat installed at the bottom of the (17) of the head a of the step (14) and with the curvature of the step plate (15) is fixed in the high position, the rear step type flame stabilizer (10) a seat mounted at the bottom of the step (17) is fixed on the rotor, so that the rear step type flame stabilizer (10) rotating together with the rotor. 2. The rotor used for an engine of a step type flame stabilizer according to Claim 1, characterized in that with the curvature of the step plate (15) of the arc length (13) and the step height (12) in the ratio 4-6 between, the step height (12) comprises steps head (14) of the height (22), and a step the head mounting seat (16) is connected with the step head (14) and with the curvature step plate (15) of the height of the wall surface. 3. The rotor used for an engine of a step type flame stabilizer according to Claim 2, characterized in that the step height (12) of the head by adjusting the step (14) of the height (22) is adjusted. 4. The rotor used for an engine of a step type flame stabilizer as in Claim 1 or Claim 2, characterized in that the curvature of the step plate (15) of the arc length (13) with a curvature through replacing step plate (15) to carry out adjustment. 5. The rotor used for an engine of a step type flame stabilizer according to Claim 1, characterized in that the step is arranged at the bottom of the seat (17) can be adjusted, are used for adjusting the rear step type flame stabilizer (10) outside engine case from the top of the combustion chamber (8) the distance between (11). 6. The rotor used for an engine of a step type flame stabilizer according to Claim 1, characterized in that the pipe (18) through the fuel feed from the bottom (3) oil supply. 7. The rotor used for an engine of a step type flame stabilizer according to Claim 6, characterized in that the fuel supply (3) the fuel is liquid fuel. 8. The rotor used for an engine of a step type flame stabilizer according to Claim 1, characterized in that the centrifugal nozzle (19) and the nozzle mounting seat (29) is fixedly connected with the screw thread manner. 9. The rotor used for an engine of a step type flame stabilizer according to Claim 1, characterized in that the rear step type flame stabilizer (10) of the ratio is in the range 0.25-0.5. 10. The rotor used for an engine of a step type flame stabilizer according to Claim 1, characterized in that the rear step type flame stabilizer (10) the windward side of a stepped head (21), the head mounting seat windward side of the step (23), the windward of the step is arranged at the bottom of the seat (26) are designed as a chamfer.