A fuel nozzle for a gas turbine engine. The nozzle has a body and a center axis. The body has an inner circumferential surface circumscribing a central passageway which is coaxial with the center axis. The nozzle also has air passages which extend predominantly radially inward through the body. The
A fuel nozzle for a gas turbine engine. The nozzle has a body and a center axis. The body has an inner circumferential surface circumscribing a central passageway which is coaxial with the center axis. The nozzle also has air passages which extend predominantly radially inward through the body. The air passage outlets of each air passage are circumferentially spaced apart from one another along the inner circumferential surface. Each air passage conveys air through the body toward the nozzle center axis and into the central passageway. The nozzle also has fuel passages which extend through the body. Each fuel passage is disposed within the body between adjacent circumferentially spaced apart air passages and is transverse to the direction of extension of its neighboring air passages.
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1. A fuel nozzle for a combustor of a gas turbine engine, comprising: an annular body defining a nozzle center axis, the body axially extending along the nozzle center axis between an upstream surface and a downstream surface, and having an inner circumferential surface circumscribing a central air
1. A fuel nozzle for a combustor of a gas turbine engine, comprising: an annular body defining a nozzle center axis, the body axially extending along the nozzle center axis between an upstream surface and a downstream surface, and having an inner circumferential surface circumscribing a central air passageway being coaxial with the nozzle center axis;a plurality of air passages, each of the air passages extending predominantly radially inward through the body toward the nozzle center axis between an air passage inlet and an air passage outlet, the air passage outlets of each of the air passages circumferentially spaced apart from one another along the inner circumferential surface of the body, each of the air passages in use conveying air through the body toward the nozzle center axis and into the central air passageway, the plurality of air passages arranged in circumferential groups of the air passages, each of the groups having at least two of the air passages, the air passage inlets of the air passages in each of the groups of the air passages being spaced a first circumferential distance from each other, the air passage inlets of two adjacent air passages of the air passages from two adjacent groups of the groups of the air passages being spaced a second circumferential distance, the first circumferential distance being less than the second circumferential distance, each of the groups being circumferentially spaced apart from adjacent another one from the groups on the body to define the second circumferential distance therebetween; anda plurality of fuel passages, each of the fuel passages axially extending through the body between a fuel passage inlet at the upstream surface of the body and a fuel passage outlet at the downstream surface of the body, each of the axially extending fuel passages disposed circumferentially between the two adjacent air passages from the adjacent groups that are spaced the second circumferential distance apart, the fuel passages being transverse to the plurality of air passages, the fuel passage inlet of each of the fuel passages being circumferentially and axially offset from the fuel passage outlet. 2. The fuel nozzle as defined in claim 1, wherein the fuel passage outlets of the plurality of fuel passages are disposed axially downstream of the air passage outlets of the plurality of air passages. 3. The fuel nozzle as defined in claim 1, further comprising a circumferential cap extending away from the downstream surface of the body along a direction parallel to the nozzle center axis and converging theretowards at an outer nozzle exit. 4. The fuel nozzle as defined in claim 3, further comprising a circumferential fuel flow converger enclosing the body and being coaxial therewith, the flow converger having a flow converger apex disposed about the circumferential cap, a second cavity defined between the flow converger apex and an outer cap surface of the circumferential cap. 5. The fuel nozzle as defined in claim 4, wherein the fuel passage outlets of the plurality of fuel passages are in fluid communication with the second cavity to convey fuel thereto. 6. The fuel nozzle as defined in claim 4, wherein the flow converger apex defines a fuel filming surface at an extremity thereof. 7. The fuel nozzle as defined in claim 1, wherein the groups of the air passages provide air to the central air passageway, the exit of the central air passageway is constrained to increase a velocity of the air exiting the central air passageway. 8. The fuel nozzle as defined in claim 1, wherein an outer circumferential surface of the body has a circumferential groove defining a circumferentially-extending inner radial wall, the air passage inlets of the air passages being circumferentially spaced apart from one another and disposed on the inner radial wall. 9. A fuel nozzle for a combustor of a gas turbine engine, comprising: an inner fuel atomizing nozzle in use conveying fuel along a nozzle center axis from an upstream end to a downstream end, the inner fuel atomizing nozzle having a convergent outer member converging towards a convergent extremity defining an outlet coaxial with the nozzle center axis;an outer atomizing nozzle, comprising:an annular body disposed about the convergent outer member and coaxial therewith, the body axially extending between an upstream surface and a downstream surface and having an inner circumferential surface;a circumferential cap extending away from the downstream surface of the body and converging towards an outer nozzle exit coaxial with the nozzle center axis, the circumferential cap having an inner cap surface and defining a cavity between the inner cap surface and the convergent outer member of the inner fuel atomizing nozzle;a plurality of air passages, each of the air passages extending predominantly radially inward through the body toward the nozzle center axis between an air passage inlet and an air passage outlet, the air passage outlets of each of the air passages circumferentially spaced apart from one another about the inner circumferential surface of the body, each of the air passages in use conveying air through the body and into the cavity, the plurality of air passages arranged in circumferential groups of the air passages, each of the groups having at least two of the air passages, the air passage inlets of the air passages in each of the groups of the air passages being spaced a first circumferential distance from each other, the air passage inlets of two adjacent air passages of the air passages from two adjacent groups of the groups of the air passages being spaced a second circumferential distance, the first circumferential distance being less than the second circumferential distance, each of the groups being circumferentially spaced apart from a circumferentially adjacent another one from the groups on the body to define the second circumferential distance therebetween; anda plurality of fuel passages, each of the fuel passages axially extending through the body between a fuel passage inlet at the upstream surface of the body and a fuel passage outlet at the downstream surface of the body, each of the axially extending fuel passages disposed circumferentially between the two adjacent air passages from the adjacent groups that are spaced the second circumferential distance apart, the fuel passages being transverse to the plurality of air passages, the fuel passage inlet of each of the fuel passages being circumferentially and axially offset from the fuel passage outlet. 10. The fuel nozzle as defined in claim 9, wherein the fuel passage outlets of the plurality of fuel passages are disposed axially downstream of the air passage outlets of the plurality of air passages. 11. The fuel nozzle as defined in claim 9, wherein the inner fuel atomizing nozzle has a heat shield enclosing the convergent extremity and being coaxial therewith, the cavity defined between the inner cap surface and an outer surface of the heat shield. 12. The fuel nozzle as defined in claim 9, further comprising a circumferential fuel flow converger enclosing the outer atomizing nozzle and being coaxial therewith, the flow converger having a flow converger apex disposed about the circumferential cap of the outer atomizing nozzle, a second cavity defined between the flow converger apex and an outer cap surface of the circumferential cap. 13. The fuel nozzle as defined in claim 12, wherein each of the fuel passage outlets is in fluid communication with the second cavity to convey fuel thereto. 14. The fuel nozzle as defined in claim 12, wherein the flow converger apex defines a fuel filming surface at an extremity thereof. 15. The fuel nozzle as defined in claim 14, wherein an outer circumferential surface of the body has a circumferential groove defining a circumferentially-extending inner radial wall, the air passage inlets of the air passages being circumferentially spaced apart from one another and disposed on the inner radial wall. 16. The fuel nozzle as defined in claim 14, further comprising a nozzle sheath enclosing the inner fuel atomizing nozzle and the outer atomizing nozzle.
Lee Fei P. (Novi MI) Guzowski Mike (Canton MI), Fuel injector assembly with first and second fuel injectors and inner, outer, and intermediate air discharge chambers.
Grethe Klaus (Gummersbach DEX) Eickhoff Heinrich (Rsrath-Kleineichen DEX) Goller Elmar (Troisdorf DEX) Hlsen Ralf (Leverkusen DEX), Method and apparatus for the low-wear atomization of liquid highly viscous and/or suspended fuel intended for combustion.
Prociw Lev A. (Willowdale CAX) Bouchard Alain (St. Charles Borromee CAX) Bolduc Pierre (St. Amable CAX) Stastny Honze (West St. Bruno CAX), Radially mounted air blast fuel injector.
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