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Multi-circuit, multi-injection point atomizer

Imported: 24 Feb '17 | Published: 06 Jan '04

Michael P. Wrubel, Rex J. Harvey, Peter Laing, Robert T. Mains, Barry W. Savel, Alfred A. Mancini, James Neil Cooper

USPTO - Utility Patents

Abstract

A fuel injector nozzle for dispensing fuel in the combustion chamber of a gas turbine engine, includes an elongated, multi-layered, convoluted nozzle feed strip having an internal passage for directing fuel through the length of the strip from the inlet end to an outlet end; and a cylindrical, multi-layered fuel dispensing nozzle unitary with the feed strip and fluidly connected to the outlet end of the feed strip for dispensing the fuel. The multi-layered feed strip and nozzle allows complex porting of fuel circuits through the injector. The internal fluid passages through the feed strip and nozzle are formed by etching.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an elevated perspective view of the inlet into a dual concentric combustion chamber for a gas turbine engine, showing a plurality of fuel injection nozzles constructed according to the principles of the present invention;

FIG. 2 is an elevated perspective view of a fuel injector for the engine of FIG. 1;

FIG. 3 is a cross-sectional side view of the fuel injector of FIG. 2;

FIG. 4 is an elevated perspective view of a first integral fuel feed strip and nozzle unit for the fuel injector of FIG. 2;

FIG. 5A is a plan view of the inner surface of a first plate for the fuel feed and injection unit of FIG. 4;

FIG. 5B is a plan view of the outer surface of the plate of FIG. 5A;

FIG. 6A is a plan view of the inner surface of a second plate for the unit of FIG. 4;

FIG. 6B is a plan view of the outer surface of the plate of FIG. 6A;

FIG. 7A is a plan view of the inner surface of a third plate for the unit of FIG. 4;

FIG. 7B is a plan view of the outer surface of the plate of FIG. 7A;

FIG. 8A is a plan view of the inner surface of a fourth plate for the unit of FIG. 4;

FIG. 8B is a plan view of the outer surface of the plate of FIG. 7A;

FIG. 9 is an enlarged cross-sectional side view of a portion of the fuel injector of FIG. 3;

FIG. 10 is an enlarged cross-sectional side view of a portion of the fuel feed and injection unit of the fuel injector;

FIG. 11 is a cross-sectional end view of the fuel injector taken substantially along the plane described by the lines

11

11 of FIG. 3; and

FIG. 12 is an elevated perspective view of a second integral fuel feed strip and nozzle unit for the fuel injector of FIG.

2.

Claims

1. A fuel injector nozzle, comprising:

2. The fuel injector nozzle as in claim 1, further including a pilot nozzle disposed centrally within the fuel dispensing nozzle, the feed strip including another internal fuel passage through the length of the strip from an inlet end to an outlet end, and the pilot nozzle is fluidly connected to the other internal fuel passage to dispense fuel.

3. The fuel injector nozzle as in claim 1, wherein the feed strip includes at least one convolution along the length of the strip.

4. The fuel injector nozzle as in claim 3, wherein the feed strip includes a plurality of lateral convolutions.

5. The fuel injector as in claim 4, wherein the feed strip is integrally attached to the fuel dispensing nozzle.

6. The fuel injector nozzle as in claim 5, wherein the feed strip and fuel dispensing nozzle are unitary with one another.

7. The fuel injector nozzle as in claim 6, further including a support stem surrounding the feed strip and fixedly connected to the fuel dispensing nozzle for support of the fuel dispensing nozzle.

8. The fuel injector nozzle as in claim 1, wherein the feed strip comprises a multi-layered arrangement of plates.

9. The fuel injector nozzle as in claim 8, wherein the plates each include a section of a flow path forming the internal fuel passage.

10. The fuel injector nozzle as in claim 9, wherein the feed strip absorbs stresses resulting from thermal differences along the length of the strip.

11. The fuel injector nozzle as in claim 10, wherein the feed strip includes at least one convolution along the length of the strip.

12. The fuel injector nozzle in claim 11, wherein the feed strip includes a plurality of lateral convolutions.

13. The fuel injector nozzle as in claim 12, wherein the feed strip is integrally attached to the fuel dispensing nozzle.

14. The fuel injector as in claim 13, wherein the feed strip and fuel dispensing nozzle are unitary with one another.

15. The fuel injector nozzle as in claim 8, wherein each of the plates has a T-shape in plan view.

16. A fuel injector nozzle, comprising:

17. The fuel injector nozzle as in claim 16, wherein the fuel dispensing nozzle includes multiple spray orifices and internal flow passages fluidly connecting the internal flow passage in the feed strip to the spray orifices.

18. The fuel injector nozzle as in claim 17, wherein the fuel dispensing nozzle has a cylindrical configuration.

19. A fuel injector nozzle for dispensing fuel into a combustion chamber of a gas turbine combustion engine, said fuel injector nozzle comprising:

20. The fuel injector nozzle as in claim 19, wherein the feed strip includes at least one convolution along the length of the strip.

21. The fuel injector nozzle as in claim 20, wherein the feed strip includes a plurality of lateral convolutions.

22. The fuel injector nozzle as in claim 21, further including a support stem surrounding the feed strip and fixedly connected to the fuel dispensing nozzle for support of the fuel dispensing nozzle.

23. The fuel injector nozzle as in claim 19, wherein the plates each include a section of a flow path forming the internal fuel passage.

24. The fuel injector nozzle as in claim 19, wherein the fuel dispensing nozzle includes a plurality of spray orifices and internal flow passages fluidly connecting the internal flow passage in the feed strip to the spray orifices.

25. The fuel injector nozzle as in claim 19, further including a pilot nozzle disposed centrally within the fuel dispensing nozzle, the feed strip including another internal fuel passage through the length of the strip from an inlet end to an outlet end, and the pilot nozzle is fluidly connected to the other internal fuel passage to dispense fuel.

26. The fuel injector nozzle as in claim 19, wherein the nozzle is formed by bending a flat, multi-layered plate assembly into a cylindrical configuration.

27. The fuel injector nozzle as in claim 19, wherein the cylindrical nozzle is circumferentially-continuous.

28. A combustion engine including a fuel injector nozzle as in claim 19, and a combustion chamber, the fuel injector nozzle supported in the combustion chamber to dispense fuel within the chamber.

29. A method for forming a fuel injector nozzle, comprising the steps of:

30. The method as in claim 29, wherein the nozzle portion is bent to form a continuous cylinder, with the ends of the cylindrical nozzle being fixed together.

31. The method as in claim 29, further including forming at least one convolution in the feed strip.