MULTI-FLUID NOZZLES

A fuel cell nozzle includes a fuel circuit receiver configured to receive a fuel circuit and an air circuit. At least a portion of the air circuit is integrally formed with the fuel circuit receiver. The nozzle can further include a base portion that is configured to interface with a fuel cell. The fuel circuit receiver and the air circuit can extend from the base portion.

Internal manifold for multipoint injection

A multipoint injection system includes a manifold with a plurality of flow passages defined through the manifold in the circumferential direction. The flow passages are spaced apart from one another in an axial direction. A plurality of feed arms extends radially inward from the manifold. Feed arm portions of the flow passages extend through each of the feed arms to respective outlets. The feed arm portions of the flow passages are within the axial width of the manifold. A plurality of injection nozzles are included, each in fluid communication with a respective one of the outlets. Each injection nozzle includes an air passage therethrough with an air inlet. The feed arms each follow a path that is circumferentially offset from the air inlets so each of the feed arms is clear from a flow path directly upstream in the axial direction of each of the air inlets.

Internal manifold for multipoint injection

A multipoint injection system includes a manifold with a plurality of flow passages defined through the manifold in the circumferential direction. The flow passages are spaced apart from one another in an axial direction. A plurality of feed arms extends radially inward from the manifold. Feed arm portions of the flow passages extend through each of the feed arms to respective outlets. The feed arm portions of the flow passages are within the axial width of the manifold. A plurality of injection nozzles are included, each in fluid communication with a respective one of the outlets. Each injection nozzle includes an air passage therethrough with an air inlet. The feed arms each follow a path that is circumferentially offset from the air inlets so each of the feed arms is clear from a flow path directly upstream in the axial direction of each of the air inlets.

FUEL INJECTORS FOR MULTIPOINT ARRAYS

A combustor dome system includes an annular combustor dome defining a main axis therethrough. The combustor dome includes opposed upstream and downstream faces, wherein the upstream face is configured to face upstream toward a compressor discharge space, wherein the downstream face is configured to face downstream toward a combustor space. The downstream face has a curved cross-sectional profile. A plurality of nozzles extends at least partially through the combustor dome from the upstream face to the downstream face for injection of fuel into the combustor space. A fuel manifold is in fluid communication with the plurality of nozzles. 1. A nozzle comprising:a nozzle assembly defining at least one of a fuel circuit and an air circuit therethrough, wherein the nozzle assembly extends along an injection axis; anda plurality of supports extending from the nozzle assembly circumferentially spaced apart from one another about the injection axis, wherein each support in the plurality of supports extends along a respective support axis, wherein the support axes are circumferentially spaced apart around an insertion axis along which the nozzle assembly can be inserted during assembly into a combustor dome that is oblique relative to the injection axis, wherein each support includes opposing side faces that are aligned with the insertion axis and oppose one another in a circumferential direction about the insertion axis.2. The nozzle as recited in claim 1 , wherein each support includes an end face that faces radially outward relative to the insertion axis.3. The nozzle as recited in claim 1 , wherein each support in the plurality of supports is aerodynamically aligned with the injection axis.4. The nozzle as recited in claim 1 , wherein at least one of the supports is swept on a non-perpendicular angle relative to the injection axis.5. The nozzle as recited in claim 1 , wherein at least one of the supports includes a fuel feed passage fluidly connected with a fuel circuit ...

FLUID DISTRIBUTOR PASSAGES

A fluid distributor includes a distributor body defining a plurality of fluid distributor passages therethrough. Each of the fluid distributor passages winds in swirl direction about a swirl axis. The swirl direction defines a swirl angle of at least 60 degrees relative to the swirl axis. Each of the fluid distributor passages defines a floor and opposed ceiling, and an opposed pair of sidewalls. At least one of the floor and/or the ceiling is vaulted to define a surface that is angled less than 60 degrees relative to the swirl axis. 1. A fluid distributor passage produced by a process of:additively manufacturing a floor, ceiling, and opposed sidewalls of the fluid distributor passage using a build direction, wherein at least one of the floor and/or the ceiling define a swirl angle greater than 60 degrees relative to the build direction.2. The fluid distributor passage as recited in claim 1 , wherein at least one of the floor and/or the ceiling define a swirl angle greater than 80 degrees relative to the build direction.3. The fluid distributor passage as recited in claim 1 , wherein at least one of the floor and/or the ceiling define a swirl angle greater than 88 degrees relative to the build direction.4. A method comprising:additively manufacturing a fluid distributor passage along a build direction, wherein the fluid distributor passage winds along a swirl path around a swirl axis that is aligned with the build direction, wherein the swirl path is angled at a swirl angle greater than 60 degrees relative to the build direction.5. The method as recited in claim 4 , wherein the swirl angle is greater than 80 degrees relative to the build direction.6. The method as recited in claim 5 , wherein a ceiling of the swirl path is self-supported without removable support structure during additively manufacturing the swirl path.7. A fluid distributor comprising:a distributor body defining a plurality of fluid distributor passages therethrough, each of the fluid distributor ...

FUEL NOZZLES

A nozzle assembly includes a fuel distributor for issuing a spray of fuel. A fuel conduit is in fluid communication with the fuel distributor and has a first end and a second end. The first end and/or the second end of the fuel conduit is operatively connected to the fuel distributor. The fuel conduit is configured to allow relative movement between the first end and the second end to accommodate dimensional variations of at least one of the nozzle assembly or a combustor. A nozzle system includes the nozzle assembly and a combustor wall having a nozzle inlet. The nozzle assembly is positioned adjacent to the nozzle inlet. 1. A nozzle assembly , comprising:a fuel distributor for issuing a spray of fuel; anda fuel conduit in fluid communication with the fuel distributor having a first end and a second end, wherein at least one of the first end or second end is operatively connected to the fuel distributor, wherein the fuel conduit is configured to allow relative movement between the first end and the second end to accommodate dimensional variations of at least one of the nozzle assembly or a combustor.2. The nozzle assembly as recited in claim 1 , further comprising an outer nozzle shell and an inner nozzle shell positioned radially inward of the outer nozzle shell claim 1 , wherein the fuel conduit is positioned between the inner nozzle shell and the outer nozzle shell.3. The nozzle assembly as recited in claim 2 , wherein the fuel distributor is between the inner and outer nozzle shells claim 2 , and includes first and second annular portions that define a fuel circuit therebetween.4. The nozzle assembly as recited in claim 3 , wherein the fuel circuit is in fluid communication with the fuel conduit.5. The nozzle assembly as recited in claim 2 , wherein the fuel conduit wraps around a periphery of the inner nozzle shell at least once to form a coil shape.6. The nozzle assembly as recited in claim 2 , wherein at least one of the inner nozzle shell or the outer ...

Sectional fuel manifolds

A multipoint fuel injection system comprises an injection system segment including a circumferentially extending outer support defining a fuel manifold with a plurality of manifold passages extending circumferentially therethrough. A first connector is included at a first circumferential end of the outer support and a second connector is included at a second circumferential end of the outer support opposite the first circumferential end. The first and second connectors are each configured to connect each manifold passage with a manifold passages of a respective outer support of a circumferentially adjacent injection system segment. The system includes a circumferentially extending inner support and a plurality of circumferentially spaced apart feed arms extending radially between the inner support and the outer support. A plurality of outlet openings extend in an axial direction from each feed arm for feeding respective injection nozzles.

FUEL MANIFOLDS

A fuel injection system includes an outer support defining a fuel manifold and an inner support, with a feed arm extending radially between the inner support and the outer support. A plurality of outlet openings extending in an axial direction from the feed arm for feeding respective injection nozzles. The feed arm defines a plurality of fuel passages therethrough in fluid communication with the fuel manifold and outlet openings to supply fuel from the fuel manifold to the outlet openings. A heat shield extends from the outer support to the inner support and extends about the outer support and the feed arm to provide heat shielding to the fuel manifold and the fuel passages. 1. A fuel injection system comprising:an outer support defining a fuel manifold;an inner support, with a feed arm extending radially between the inner support and the outer support;a plurality of outlet openings extending in an axial direction from the feed arm for feeding respective injection nozzles, wherein the feed arm defines a plurality of fuel passages therethrough in fluid communication with the fuel manifold and outlet openings to supply fuel from the fuel manifold to the outlet openings; anda heat shield extending from the outer support to the inner support and extending about the outer support and the feed arm to provide heat shielding to the fuel manifold and the fuel passages.2. The system as recited in claim 1 , wherein a single contiguous insulative gap is defined between the heat shield and both of the outer support and the feed arm.3. The system as recited in claim 2 , wherein the heat shield includes openings therethrough for connection of injection nozzles to the outlet openings.4. The system as recited in claim 2 , wherein the heat shield is solely supported by flexure structures that connect the heat shield to the inner and outer supports.5. The system as recited in claim 4 , wherein each flexure structure defines a plurality of holes through the heat shield into the ...

SECTIONAL FUEL MANIFOLDS

A multipoint fuel injection system comprises an injection system segment including a circumferentially extending outer support defining a fuel manifold with a plurality of manifold passages extending circumferentially therethrough. A first connector is included at a first circumferential end of the outer support and a second connector is included at a second circumferential end of the outer support opposite the first circumferential end. The first and second connectors are each configured to connect each manifold passage with a manifold passages of a respective outer support of a circumferentially adjacent injection system segment. The system includes a circumferentially extending inner support and a plurality of circumferentially spaced apart feed arms extending radially between the inner support and the outer support. A plurality of outlet openings extend in an axial direction from each feed arm for feeding respective injection nozzles.

HEAT SHIELDING FOR INTERNAL FUEL MANIFOLDS

A fuel injector system includes an outer support and an inner support, with a feed arm extending radially between the inner support and the outer support. A plurality of outlet openings extend in an axial direction from the feed arm for feeding respective injection nozzles. The outer support and feed arm define a plurality of fuel passages therethrough to convey fluid from an external source through the outer support and feed arm to the outlet openings. A heat shield extends around the feed arm from the outer support to the inner support. The heat shield is spaced apart from the feed arm with an insulative gap therebetween.

COMBUSTOR DOME TILES

A tile for a combustor dome of a gas turbine engine includes a tile body defining an upstream surface and an axially opposed downstream surface with at least one injection orifice defined through the tile body from the upstream surface to the downstream surface. The tile body extends in a radial direction from a radially inner surface to a radially outer surface. The radially inner and outer surfaces define circular arcs that are concentric with one another. The tile body extends circumferentially from a first end face to a second end face. The first end face follows a sigmoid profile and the second end face follows a sigmoid profile configured to interlock with the sigmoid profile of the first end face of another identical tile body. 1. A tile for a combustor dome of a gas turbine engine comprising:a tile body defining an upstream surface and an axially opposed downstream surface with at least one injection orifice defined through the tile body from the upstream surface to the downstream surface,wherein the tile body extends in a radial direction from a radially inner surface to a radially outer surface, wherein the radially inner and outer surfaces define circular arcs that are concentric with one another, andwherein the tile body extends circumferentially from a first end face to a second end face, wherein the first end face follows a sigmoid profile and wherein the second end face follows a sigmoid profile configured to interlock with the sigmoid profile of the first end face of another identical tile body.2. The tile as recited in claim 1 , wherein the tile body includes a ceramic matrix composite (CMC) material.3. The tile as recited in claim 1 , wherein each of the first and second end faces of the tile body defines a pair of axially spaced apart channels claim 1 , wherein each of the channels runs from the radially inner surface to the radially outer surface of the tile body.4. The tile as recited in claim 3 , wherein each channel of at least one of the ...

Internal manifold for multipoint injection

A multipoint injection system includes a manifold with a plurality of flow passages defined through the manifold in the circumferential direction. The flow passages are spaced apart from one another in an axial direction. A plurality of feed arms extends radially inward from the manifold. Feed arm portions of the flow passages extend through each of the feed arms to respective outlets. The feed arm portions of the flow passages are within the axial width of the manifold. A plurality of injection nozzles are included, each in fluid communication with a respective one of the outlets. Each injection nozzle includes an air passage therethrough with an air inlet. The feed arms each follow a path that is circumferentially offset from the air inlets so each of the feed arms is clear from a flow path directly upstream in the axial direction of each of the air inlets.

Multi-fluid nozzles

A fuel cell nozzle includes a fuel circuit receiver configured to receive a fuel circuit and an air circuit. At least a portion of the air circuit is integrally formed with the fuel circuit receiver. The nozzle can further include a base portion that is configured to interface with a fuel cell. The fuel circuit receiver and the air circuit can extend from the base portion.

Heat shielding for internal fuel manifolds

A fuel injector system includes an outer support and an inner support, with a feed arm extending radially between the inner support and the outer support. A plurality of outlet openings extend in an axial direction from the feed arm for feeding respective injection nozzles. The outer support and feed arm define a plurality of fuel passages therethrough to convey fluid from an external source through the outer support and feed arm to the outlet openings. A heat shield extends around the feed arm from the outer support to the inner support. The heat shield is spaced apart from the feed arm with an insulative gap therebetween.

FUEL MANIFOLDS

A fuel injection system includes an outer support defining a fuel manifold and an inner support, with a feed arm extending radially between the inner support and the outer support. A plurality of outlet openings extending in an axial direction from the feed arm for feeding respective injection nozzles. The feed arm defines a plurality of fuel passages therethrough in fluid communication with the fuel manifold and outlet openings to supply fuel from the fuel manifold to the outlet openings. A heat shield extends from the outer support to the inner support and extends about the outer support and the feed arm to provide heat shielding to the fuel manifold and the fuel passages. 1. A method of making a fuel injector system comprising:additively manufacturing a circumferentially extending outer support together with a circumferentially extending inner support, a feed arm extending radially between the inner support and the outer support, and a heat shield extending from the outer support to the inner support and extending about the outer support and the feed arm, wherein the heat shield is spaced apart from the feed arm with an insulative gap, wherein the additively manufacturing includes building in an axial build direction beginning from downstream portions of the inner and outer supports.2. The method as recited in claim 1 , wherein additively manufacturing includes forming the feed arm and a portion of the heat shield adjacent the feed arm by additively growing the feed arm and heat shield in the axial build direction claim 1 , wherein the feed arm and portion of the heat shield adjacent to the feed arm are self-supporting as they are grown and are grown to define a vaulted angle relative to the axial build direction.3. The method as recited in claim 1 , wherein additively manufacturing includes forming vaulted weight reduction voids within the feed arm.4. The method as recited in claim 1 , wherein additively manufacturing includes forming vaulted fuel manifold ...

Fuel injectors including gas fuel injection

In accordance with at least one aspect of this disclosure, a fuel injector can include an annular body defining a gas fuel inlet therein, and a structure extending radially outward from the annular body and configured to extend into an air circuit. The structure can include a gas channel defined within the structure at least partially along a radial length of the structure. The gas channel is in fluid communication with the gas fuel inlet where the structure meets the annular body. The structure also includes a slot opening defined at least partially along a radial length of the structure and configured to fluidically connect the gas channel and the air circuit to all gas fuel to effuse into the air circuit.

FUEL INJECTORS FOR MULTIPOINT ARRAYS

A combustor dome system includes an annular combustor dome defining a main axis therethrough. The combustor dome includes opposed upstream and downstream faces, wherein the upstream face is configured to face upstream toward a compressor discharge space, wherein the downstream face is configured to face downstream toward a combustor space. The downstream face has a curved cross-sectional profile. A plurality of nozzles extends at least partially through the combustor dome from the upstream face to the downstream face for injection of fuel into the combustor space. A fuel manifold is in fluid communication with the plurality of nozzles. 1. A nozzle comprising:a nozzle assembly defining at least one of a fuel circuit and an air circuit therethrough, wherein the nozzle assembly extends along an injection axis; anda plurality of supports extending from the nozzle assembly circumferentially spaced apart from one another about the injection axis, wherein each support in the plurality of supports extends along a respective support axis, wherein the support axes are circumferentially spaced apart around an insertion axis along which the nozzle assembly can be inserted during assembly into a combustor dome that is oblique relative to the injection axis.2. The nozzle as recited in claim 1 , wherein each support includes opposing side faces that are aligned with the insertion axis.3. The nozzle as recited in claim 1 , wherein each support in the plurality of supports is aerodynamically aligned with the injection axis.4. The nozzle as recited in claim 1 , wherein at least one of the supports is swept on a non-perpendicular angle relative to the injection axis.5. The nozzle as recited in claim 1 , wherein at least one of the supports includes a fuel feed passage fluidly connected with a fuel circuit of the nozzle assembly for fluid communication of fuel from a manifold into the fuel circuit.6. The nozzle as recited in claim 1 , further comprising a combustor dome defining an ...

FUEL NOZZLE MANIFOLD SYSTEMS FOR TURBOMACHINES

An internal fuel manifold for a turbomachine can include an outer ring defining one or more fuel supply channels configured to allow fuel flow around at least a portion of a circumference of the outer ring, and a plurality of branches extending radially inward from the outer ring. The branches include a high aspect ratio shape. The plurality of branches can include one or more branch fuel channels in fluid communication with at least one of the one or more fuel supply channels. The manifold includes one or more injector connectors extending axially aft from each branch, each injector connector in fluid communication with a branch fuel channel and configured to connect to a fuel injector. The manifold can include an inner ring extending from the plurality of branches. The inner ring and the outer ring are configured to receive a fuel injector and combustor assembly therebetween and to allow retaining of the fuel injector assembly and combustor assembly to the internal fuel manifold. 1. An internal fuel manifold for a turbomachine , comprising:an outer ring defining one or more fuel supply channels configured to allow fuel flow around at least a portion of a circumference of the outer ring;a plurality of branches extending radially inward from the outer ring, wherein the branches include a high aspect ratio shape, wherein the plurality of branches include one or more branch fuel channels in fluid communication with at least one of the one or more fuel supply channels;one or more injector connectors extending axially aft from each branch, each injector connector in fluid communication with a branch fuel channel and configured to connect to a fuel injector; andan inner ring extending from the plurality of branches, wherein the inner ring and the outer ring are configured to receive a fuel injector and combustor assembly therebetween and to allow retaining of the fuel injector and combustor assembly to the internal fuel manifold.2. The manifold of claim 1 , wherein one ...

FUEL INJECTORS FOR TURBOMACHINES

A fuel injector for a multipoint injection system can include a body defining an air cavity for allowing air to flow therethrough and an interior cavity. A fuel is tube disposed at least partially within the interior cavity of the body. The fuel tube can include a first end configured to connect to a fuel injector connector of a fuel manifold, and a second end configured to connect to a fuel distributor of the fuel injector, wherein the fuel injector is configured to be disposed at least partially in a combustor dome. The fuel tube is configured to move in an axial direction to allow flexibility between the fuel manifold and the combustor dome. 1. A fuel injector for a multipoint injection system , comprising:a body defining an air cavity for allowing air to flow therethrough and an interior cavity;a fuel tube disposed at least partially within the interior cavity of the body, wherein the fuel tube includes a first end configured to connect to a fuel injector connector of a fuel manifold, and a second end configured to connect to a fuel distributor of the fuel injector, wherein the fuel injector is configured to be disposed at least partially in a combustor dome, andwherein the fuel tube is configured to move in an axial direction to allow flexibility between the fuel manifold and the combustor dome.2. The injector of claim 1 , wherein the fuel tube is a coiled fuel tube.3. The injector of claim 2 , wherein the coiled fuel tube is configured to axially compress and/or expand between the first end and the second end.4. The injector of claim 2 , wherein the coiled tube is contained within the interior cavity.5. The injector of claim 4 , wherein the body is formed from an outer heat shield and an inner heat shield disposed within the outer heat shield.6. The injector of claim 5 , wherein the outer heat shield and the inner heat shield are integrally formed together claim 5 , wherein the inner heat shield at least partially defines the air cavity.7. The injector of ...

FUEL INJECTORS FOR TURBOMACHINES HAVING INNER AIR SWIRLING

A fuel injector for a turbomachine includes an inner heat shield having an air cavity wall defining an air cavity for allowing air to flow therethrough. The inner heat shield includes an integral air swirler forming a downstream end thereof. The integral air swirler extends in an axially downstream direction at least as far as a fuel distribution channel defined on or in a fuel distributor of the injector to direct airflow at an outlet of the fuel distributor. 1. A fuel injector for a turbomachine , comprising:an inner heat shield having an air cavity wall defining an air cavity for allowing air to flow therethrough, wherein the inner heat shield includes an integral air swirler forming a downstream end of the heat shield, wherein the integral air swirler extends in an axially downstream direction at least as far as a fuel distribution channel defined on or in a fuel distributor of the injector to direct airflow at an outlet of the fuel distributor.2. The fuel injector of claim 1 , wherein the integral air swirler includes an angled or curved wall extending from the downstream end of the air cavity wall such that the angled or curved wall extends both axially downstream and radially inward.3. The fuel injector of claim 2 , wherein the angled or curved wall includes a plurality of swirling channels defined therethrough and configured to effuse swirling air.4. The fuel injector of claim 3 , wherein the air swirler includes a upstream extending wall that extends from a downstream end of the angled or curved wall in the axially upstream direction.5. The fuel injector of claim 4 , wherein the upstream extending wall includes one or more inner swirling holes configured to effuse swirling air.6. The fuel injector of claim 4 , wherein the upstream extending wall extends both axially upstream and radially inward.7. The fuel injector of claim 6 , wherein the upstream extending wall includes a conical or frustoconical shape.8. The fuel injector of claim 6 , wherein the ...

FUEL INJECTORS HAVING AIR SEALING STRUCTURES

A fuel injector for a turbomachine includes an outer heat shield configured to sit on and/or within a combustor dome to orient the fuel injector relative to the combustor dome and/or a fuel manifold. An inner surface of the outer heat shield includes an outer heat shield seal surface. The injector also includes a fuel prefilmer seated at least partially within the outer heat shield. An outer surface of the fuel prefilmer includes a prefilmer seal surface configured to mate with the outer heat shield seal surface such that the fuel prefilmer seats on the outer heat shield seal surface and such that the prefilmer seal surface is configured to allow the surfaces to slide relative to one another in both a radial and axial direction. 1. A fuel injector for a turbomachine , comprising:an outer heat shield configured to sit on and/or within a combustor dome to orient the fuel injector relative to the combustor dome and/or a fuel manifold, wherein an inner surface of the outer heat shield includes an outer heat shield seal surface; anda fuel prefilmer seated at least partially within the outer heat shield, wherein an outer surface of the fuel prefilmer includes a prefilmer seal surface configured to mate with the outer heat shield seal surface such that the fuel prefilmer seats on the outer heat shield seal surface and such that the prefilmer seal surface is configured to allow the surfaces to slide relative to one another in both a radial and axial direction.2. The fuel injector of claim 1 , wherein the outer heat shield seal surface and the prefilmer seal surface are frustoconical shaped.3. The fuel injector of claim 1 , further comprising a fuel distributor seated on and/or at least partially within the fuel prefilmer claim 1 , wherein an inner surface of the fuel distributor includes a distributor seal surface.4. The fuel injector of claim 3 , further comprising an inner heat shield seated at least partially within the fuel distributor claim 3 , wherein an outer surface ...

RADIAL EQUILIBRATED COMBUSTION NOZZLE ARRAY

A fuel injection system for a gas turbine engine includes a first plurality of fuel nozzles arrayed in a circular pattern. Each of the nozzles in the first plurality of fuel nozzles includes a first airflow area defined therethrough. A second plurality of fuel nozzles radially inward from the first plurality of fuel nozzles. Each of the nozzles in the second plurality of fuel nozzles includes a second airflow area defined therethrough. The first airflow area is larger than the second airflow area. A third plurality of fuel nozzles can be radially inward from the second plurality of fuel nozzles. Each of the nozzles in the third plurality of fuel nozzles can include a third airflow area defined therethrough. The second airflow area can be larger than the third airflow area. 1. A fuel injection system for a gas turbine engine comprising:a first plurality of fuel nozzles arrayed in a circular pattern, wherein each of the nozzles in the first plurality of fuel nozzles includes a first airflow area defined therethrough;a second plurality of fuel nozzles radially inward from the first plurality of fuel nozzles, wherein each of the nozzles in the second plurality of fuel nozzles includes a second airflow area defined therethrough, wherein the first airflow area is larger than the second airflow area.2. The system as recited in claim 1 , further comprising a third plurality of fuel nozzles radially inward from the second plurality of fuel nozzles claim 1 , wherein each of the nozzles in the third plurality of fuel nozzles includes a third airflow area defined therethrough claim 1 , wherein the second airflow area is larger than the third airflow area.3. The system as recited in claim 2 , wherein each of the first claim 2 , second claim 2 , and third pluralities of fuel nozzles includes an equal number of fuel nozzles.4. The system as recited in claim 2 , further comprising at least one additional plurality of fuel nozzles claim 2 , each radially inward from another one of ...

Fuel nozzle manifold systems for turbomachines

An internal fuel manifold for a turbomachine can include an outer ring defining one or more fuel supply channels configured to allow fuel flow around at least a portion of a circumference of the outer ring, and a plurality of branches extending radially inward from the outer ring. The branches include a high aspect ratio shape. The plurality of branches can include one or more branch fuel channels in fluid communication with at least one of the one or more fuel supply channels. The manifold includes one or more injector connectors extending axially aft from each branch, each injector connector in fluid communication with a branch fuel channel and configured to connect to a fuel injector. The manifold can include an inner ring extending from the plurality of branches. The inner ring and the outer ring are configured to receive a fuel injector and combustor assembly therebetween and to allow retaining of the fuel injector assembly and combustor assembly to the internal fuel manifold.

Fuel injectors for turbomachines

A fuel injector for a multipoint injection system can include a body defining an air cavity for allowing air to flow therethrough and an interior cavity. A fuel is tube disposed at least partially within the interior cavity of the body. The fuel tube can include a first end configured to connect to a fuel injector connector of a fuel manifold, and a second end configured to connect to a fuel distributor of the fuel injector, wherein the fuel injector is configured to be disposed at least partially in a combustor dome. The fuel tube is configured to move in an axial direction to allow flexibility between the fuel manifold and the combustor dome.

Fuel injectors for multipoint arrays

A combustor dome system includes an annular combustor dome defining a main axis therethrough. The combustor dome includes opposed upstream and downstream faces, wherein the upstream face is configured to face upstream toward a compressor discharge space, wherein the downstream face is configured to face downstream toward a combustor space. The downstream face has a curved cross-sectional profile. A plurality of nozzles extends at least partially through the combustor dome from the upstream face to the downstream face for injection of fuel into the combustor space. A fuel manifold is in fluid communication with the plurality of nozzles.

Systems for fuel injectors with fuel air heat exchangers

A system includes an air manifold, a fuel manifold, and a plurality of fuel injectors. At least one of the fuel injectors includes a heat exchanger portion for supplying compressed, cooled air form the heat exchanger portion to the air manifold. An air valve is operatively connected to an outlet of the air manifold for controlling release of air from the air manifold. A controller is operatively connected to the air valve, wherein the controller includes machine readable instructions configured to control the air valve to regulate flow of air through the air valve based on fuel temperatures in the fuel channel. The machine readable instructions can be configured to cause the controller to flow air through the air valve in a heat exchange mode if a fuel temperature in the fuel injectors is below a predetermined fuel temperature.

Fuel injectors with heat exchangers

A fuel injector system for a gas turbine engine comprises a mounting flange (102) to be mounted to an engine case (104), a fixture (106) extending in an outward direction from the mounting flange operable to connect to fuel and air systems outside the engine case, a feed arm (108) extending radially inward from the mounting flange, a fuel nozzle (110) extending from the feed arm and operable to issue fuel into a combustor (112), a fuel channel (114) extending from an inlet (116) through the feed arm and out an outlet (118) of the fuel nozzle, and an air channel (120) extending from an inlet in the feed arm and/or nozzle, through the feed arm, and to an outlet in the fixture, wherein the fuel channel and the air channel are in fluid isolation from one another, and wherein the fuel channel and the air channel are in thermal communication with one another as a heat exchanger.

Heat shielding for internal fuel manifolds

A fuel injector system includes an outer support and an inner support, with a feed arm extending radially between the inner support and the outer support. A plurality of outlet openings extend in an axial direction from the feed arm for feeding respective injection nozzles. The outer support and feed arm define a plurality of fuel passages therethrough to convey fluid from an external source through the outer support and feed arm to the outlet openings. A heat shield extends around the feed arm from the outer support to the inner support. The heat shield is spaced apart from the feed arm with an insulative gap therebetween.

Sectional fuel manifolds

A multipoint fuel injection system comprises an injection system segment including a circumferentially extending outer support defining a fuel manifold with a plurality of manifold passages extending circumferentially therethrough. A first connector is included at a first circumferential end of the outer support and a second connector is included at a second circumferential end of the outer support opposite the first circumferential end. The first and second connectors are each configured to connect each manifold passage with a manifold passages of a respective outer support of a circumferentially adjacent injection system segment. The system includes a circumferentially extending inner support and a plurality of circumferentially spaced apart feed arms extending radially between the inner support and the outer support. A plurality of outlet openings extend in an axial direction from each feed arm for feeding respective injection nozzles.

Multipoint fuel injection system and related manufacturing method

Systems for fuel injectors with fuel air heat exchangers

A system includes an air manifold, a fuel manifold, and a plurality of fuel injectors. At least one of the fuel injectors includes a heat exchanger portion for supplying compressed, cooled air form the heat exchanger portion to the air manifold. An air valve is operatively connected to an outlet of the air manifold for controlling release of air from the air manifold. A controller is operatively connected to the air valve, wherein the controller includes machine readable instructions configured to control the air valve to regulate flow of air through the air valve based on fuel temperatures in the fuel channel. The machine readable instructions can be configured to cause the controller to flow air through the air valve in a heat exchange mode if a fuel temperature in the fuel injectors is below a predetermined fuel temperature.

Multipoint injection system for a gas turbine engine

Systems for fuel injectors with fuel air heat exchangers

A system includes an air manifold, a fuel manifold, and a plurality of fuel injectors. At least one of the fuel injectors includes a heat exchanger portion for supplying compressed, cooled air form the heat exchanger portion to the air manifold. An air valve is operatively connected to an outlet of the air manifold for controlling release of air from the air manifold. A controller is operatively connected to the air valve, wherein the controller includes machine readable instructions configured to control the air valve to regulate flow of air through the air valve based on fuel temperatures in the fuel channel. The machine readable instructions can be configured to cause the controller to flow air through the air valve in a heat exchange mode if a fuel temperature in the fuel injectors is below a predetermined fuel temperature.

Fuel manifolds

A fuel injection system includes an outer support (102) defining a fuel manifold and an inner support (104), with a feed arm (106) extending radially between the inner support (104) and the outer support (102). A plurality of outlet openings (108) extends in an axial direction from the feed arm (106) for feeding respective injection nozzles. The feed arm (106) defines a plurality of fuel passages (134) therethrough in fluid communication with the fuel manifold and outlet openings (108) to supply fuel from the fuel manifold to the outlet openings. A heat shield (140) extends from the outer support (102) to the inner support (104) and extends about the outer support (102) and the feed arm (106) to provide heat shielding to the fuel manifold and the fuel passages.

Fuel injectors with heat exchangers

Multi-fluid nozzles

A fuel cell nozzle includes a fuel circuit receiver configured to receive a fuel circuit and an air circuit. At least a portion of the air circuit is integrally formed with the fuel circuit receiver. The nozzle can further include a base portion that is configured to interface with a fuel cell. The fuel circuit receiver and the air circuit can extend from the base portion.

Internal fuel manifolds

A system includes an internal manifold ring defining at least one circumferentially extending flow channel. A plurality of feed arms extends outward from the manifold ring. A circumferentially segmented outer ring can be supported from the feed arms, outboard of the feed arms. Each feed arm can include a plurality of branches extending therefrom, wherein each branch is in fluid communication with the manifold ring through a respective one of the feed arms. A plurality of nozzles can be included, each nozzle connected to a respective one of the branches, wherein the system is devoid of nozzles radially inward from the manifold ring.

Multi-fluid nozzles

A fuel cell nozzle includes a fuel circuit receiver configured to receive a fuel circuit and an air circuit. At least a portion of the air circuit is integrally formed with the fuel circuit receiver. The nozzle can further include a base portion that is configured to interface with a fuel cell. The fuel circuit receiver and the air circuit can extend from the base portion.

Fluid distributor passages

A fluid distributor includes a distributor body defining a plurality of fluid distributor passages therethrough. Each of the fluid distributor passages winds in swirl direction about a swirl axis. The swirl direction defines a swirl angle of at least 60 degrees relative to the swirl axis. Each of the fluid distributor passages defines a floor and opposed ceiling, and an opposed pair of sidewalls. At least one of the floor and/or the ceiling is vaulted to define a surface that is angled less than 60 degrees relative to the swirl axis.