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An injector assembly includes a barrel-shaped housing and an injector, the injector including a feed ring formed of multiple, etched, T-shaped plates. A plurality of nozzles are arranged in an evenly-spaced array around the injector and direct fluid radially inward into the central annulus of the in

An injector assembly includes a barrel-shaped housing and an injector, the injector including a feed ring formed of multiple, etched, T-shaped plates. A plurality of nozzles are arranged in an evenly-spaced array around the injector and direct fluid radially inward into the central annulus of the injector assembly. The injector includes an air inlet port with an internal feed passage fluidly connected to swirl chambers and exit orifices to provide individual sprays of fuel from the nozzles. Integral air swirlers impart a swirling component of motion to the fuel sprays. A venturi configuration is provided by the housing. The nozzles are provided along the venturi configuration, which maintains fluid separation from the walls of the housing downstream from the venturi.

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What is claimed is: 1. An injector assembly, comprising: an injector comprising an elongated, essentially flat feed strip in cross-section formed into a ring, said ring including a plurality of thin plates of etchable material disposed in adjacent, surface-to-surface relation with one another, said

What is claimed is: 1. An injector assembly, comprising: an injector comprising an elongated, essentially flat feed strip in cross-section formed into a ring, said ring including a plurality of thin plates of etchable material disposed in adjacent, surface-to-surface relation with one another, said ring including a plurality of nozzles arranged in a spaced apart manner around a surface of the ring, each of said nozzles including: i) fuel metering structure formed in at least one plate with a bowl-shaped fuel swirl chamber shaped by etching such that fuel to be sprayed can move therein in a vortex motion toward the center of the fuel swirl chamber; and a spray orifice in fluid communication with the center of the fuel swirl chamber and extending substantially co-axial therewith such that fuel to be sprayed can move from the fuel swirl chamber to the spray orifice and then exit through the spray orifice in a spray; at least one fuel feed slot in fluid communication with the fuel swirl chamber and extending in non-radial relation thereto for supplying fuel to be sprayed; and ii) air swirler structure formed in at least one plate with a cylindrical air swirler passage shaped by etching through the at least one plate of the air swirler set, the cylindrical air swirler passage located in co-axial relation to the spray orifice in the fuel metering set such that fuel directed through the spray orifice passes through the air swirler passage and swirling air can be imparted to the fuel to cause the fuel to have a swirling component of motion; and at least one air feed slot in fluid communication with the air swirler passage and extending in non-radial relation thereto for supplying air to be swirled in the air swirler passage. 2. The injector assembly as in claim 1, wherein each nozzle is defined by a plurality of plates in adjacent, surface-to-surface relation with one another, with one of said plates including the bowl-shaped swirl chamber and the at least one fuel feed slot, and another of said plates including the spray orifice. 3. The injector assembly as in claim 1, wherein an air supply passage feeds the at least one air feed slot. 4. The injector assembly as in claim 1, wherein the feed ring includes a radially-inward facing surface and a radially outward facing surface, and the nozzles are arranged around the radially inward facing surface for dispensing fuel radially inward toward the central axis of the feed ring. 5. The injector assembly as in claim 1, wherein the nozzles are arranged in an evenly-spaced apart array around the feed ring. 6. The injector assembly as in claim 1, wherein the injector also includes a radially-outward projecting tab including an inlet fuel passage fluidly connected to the at least one fuel feed slot of each nozzle. 7. The injector assembly as in claim 1, wherein the fuel metering structure includes at least one plate, and the air swirler structure also includes at least one plate, with a plate of the fuel metering structure disposed in surface-to-surface adjacent relation to a plate of the air swirler structure. 8. The injector assembly as in claim 1, wherein the plates are formed of metal. 9. The injector assembly as in claim 1, and further including a barrel-shaped housing surrounding and supporting the feed ring. 10. The injector assembly as in claim 9, wherein the housing comprises an upstream barrel portion and a downstream barrel portion, each portion including a chamber portion, which when the barrel portions are assembled together, define a ring chamber receiving and supporting the feed ring. 11. The injector assembly as in claim 10, wherein one of said barrel portions includes an inner annular flange, radially inward disposed of the feed ring, and a plurality of ports circumferentially aligned with each spray orifice in the fuel metering structure such that fuel directed through the spray orifice passes radially-inward through a respective port of the one barrel portion. 12. The injector assembly as in claim 11, wherein the inner annular flange of the one barrel portion radially inward supports the feed ring. 13. The injector assembly as in claim 9, wherein the housing includes an inner annular flange, radially inward disposed of the feed ring, and including a plurality of ports circumferentially aligned with each spray orifice in the fuel metering structure such that fuel directed through the spray orifice passes through a respective port, the inner annular flange having a venturi configuration radially inwardly-projecting into the central annulus of the barrel and defining an upstream barrel portion and a downstream barrel portion, and the ports are arranged on the venturi configuration, such that fuel dispensed through the spray orifices remains substantially separated from interior walls of the housing along the downstream barrel portion. 14. The injector assembly as in claim 12, wherein the ports are arranged along about an axial midpoint of the venturi configuration. 15. A fuel injector assembly for turbine applications, comprising: a housing having an inlet fuel passage for receiving and directing fuel through the housing; an injector assembly supported by the housing, the injector assembly including a barrel-shaped housing; and an injector comprising a feed strip formed into a ring configuration, said injector including a plurality of stacked plates of etchable material, said injector including a plurality of nozzles arranged in a spaced apart manner around the ring, each of said nozzles including: i) a metering assembly formed in at least one plate with a bowl-shaped fuel swirl chamber shaped by etching such that fuel to be sprayed from the injector can move therein in a vortex motion toward the center of the swirl chamber; and a spray orifice in fluid communication with the center of the swirl chamber and extending substantially co-axial therewith such that fuel to be sprayed from the injector can move from the swirl chamber to the spray orifice and then exit through the spray orifice in a spray; at least one feed slot in fluid communication with the fuel passages in the feed stem and with the swirl chamber and extending in non-radial relation with respect to the swirl chamber for supplying fuel to be sprayed through the injector; and ii) an air swirler formed in at least one plate with a cylindrical air swirler passage shaped by etching through the at least one plate of the air swirler set, the cylindrical air swirler passage located in co-axial relation to the spray orifice in the metering assembly such that fuel directed through the spray orifice passes through the air swirler passage and swirling air can be imparted to the fuel to cause the fuel to have a swirling component of motion; and at least one air feed slot in fluid communication with the air swirler passage and extending in non-radial relation thereto for supplying air to be swirled in the air swirler passage, wherein the housing surrounds and supports the feed ring. 16. The fuel injector assembly as in claim 15, wherein the metering assembly includes a plurality of plates in adjacent, surface-to-surface relation with one another, with one of said plates of the metering assembly including the bowl-shaped swirl chamber and the at least one feed slot, and another of said plates of the metering assembly including the spray orifice. 17. The fuel injector assembly as in claim 16, wherein an air supply passage feeds the at least one air feed slot. 18. The fuel injector assembly as in claim 17, wherein the air supply passage extends through the multiple plates of the air swirler and fluidly connects with an air supply passage extending through the housing. 19. The fuel injector assembly as in claim 15, wherein the plates are formed of metal. 20. The fuel injector assembly as in claim 15, wherein the feed ring includes a radially-inward facing surface and a radially outward facing surface, and the nozzles are arranged around the radially inward facing surface for dispensing fuel radially inward toward the central axis of the feed ring. 21. The fuel injector assembly as in claim 18, wherein the nozzles are arranged in an evenly-spaced apart array around the ring. 22. The fuel injector assembly as in claim 15, wherein the feed ring includes a radially-outward projecting tab including an inlet passage fluidly connected to the at least one feed slot of each metering set, the tab sealing against an end surface of a radially-enlarged annular flange of the housing, and a fluid passage in the housing flange fluidly connected to the inlet passage in the tab. 23. The fuel injector assembly as in claim 15, wherein the metering assembly includes at least one plate, and the air swirler also includes at least one plate, with a plate of the metering assembly disposed in surface-to-surface adjacent relation to a plate of the air swirler. 24. The fuel injector assembly as in claim 15, wherein the housing comprises an upstream barrel portion and a downstream barrel portion, each portion including a chamber portion, which when the barrel portions are assembled together, define a ring chamber receiving and supporting the feed ring. 25. The fuel injector assembly as in claim 24, wherein one of said barrel portions includes an inner annular flange, radially inward disposed of the feed ring, and including a plurality of ports circumferentially aligned with each spray orifice in the metering set such that fuel directed through the spray orifice passes radially-inward through a respective port of the barrel portion. 26. The fuel injector assembly as in claim 25, wherein the inner annular flange of the one barrel portion radially inward supports the feed ring. 27. The fuel injector assembly as in claim 15, wherein the housing includes an inner annular flange, radially inward disposed of the feed ring, and a plurality of ports circumferentially aligned with each spray orifice in the metering set such that fuel directed through the spray orifice passes through a respective port, the inner annular flange having a venturi configuration radially inwardly-projecting into the central annulus of the barrel and defining an upstream barrel portion and a downstream barrel portion, and the ports are arranged on the venturi configuration, such that fuel dispensed through the spray orifices remains substantially separated from interior walls of the housing along the downstream barrel portion. 28. The fuel injector assembly as in claim 27, wherein the ports are arranged along about an axial midpoint of the venturi configuration. 29. A combustion system, comprising: a combustor; and an injector assembly mounted to an upstream wall of the combustor, the injector assembly including a barrel-shaped housing; and an injector comprising a feed strip formed into a ring configuration, said ring including a plurality of stacked plates of etchable material, said ring including a plurality of nozzles arranged in a spaced apart manner around the feed ring, each of said nozzles including a metering assembly and an air swirler with configurations such that fuel is sprayed from the injector and swirling air can be imparted to the fuel to cause the fuel to have a swirling component of motion; and wherein the housing surrounds and supports the feed ring, wherein the housing includes an inner annular flange, radially inward disposed of the feed ring, and including a plurality of ports circumferentially aligned with each spray orifice in the metering set such that fuel directed through the spray orifice passes through a respective port, the inner annular flange having a venturi configuration radially inwardly-projecting into the central annulus of the barrel and defining an upstream barrel portion and a downstream barrel portion, and the ports are arranged on the venturi configuration, such that fuel dispensed through the spray orifices remains substantially separated from interior walls of the housing along the downstream barrel portion. 30. The combustion system as in claim 29, wherein an inner annular flange of the one barrel portion radially inward supports the feed ring. 31. The combustion system as in claim 29, wherein the ports are arranged along about an axial midpoint of the venturi configuration. 32. The combustion system as in claim 29, further including means for dispensing the fuel in a spray and means for imparting air in a swirling motion to the fuel to cause the fuel to have a swirling component of motion.