Liquid fuel nozzles for dual fuel combustors

Patent metadata

Field	Value
Publication number	US-2018356097-A1
Application number	US-201515780496-A
Country	US
Kind code	A1
Filing date	Dec 30, 2015
Priority date	Dec 30, 2015
Publication date	Dec 13, 2018
Grant date	—

Abstract

A nozzle for a combustor is disclosed. The nozzle may include a main fuel passage (202), a number of radial fuel ports (206) in communication with the main fuel passage, a prefilmer surface (212) in communication with the radial fuel ports, and a main purge air passage (218) in communication with the radial fuel ports and the prefilmer surface.

First claim

That which is claimed:

1 . A nozzle for a combustor, the nozzle comprising:
a main fuel passage; a plurality of radial fuel ports in communication with the main fuel passage; a prefilmer surface in communication with the plurality of radial fuel ports; and a main purge air passage in communication with the plurality of radial fuel ports and the prefilmer surface.

2 . The nozzle of claim 1 , further comprising a radial lip spaced apart from the prefilmer surface and disposed about the plurality of radial fuel ports.

3 . The nozzle of claim 1 , wherein the main purge air passage comprises a first outlet at a first end of the prefilmer surface adjacent to the plurality of radial fuel ports.

4 . The nozzle of claim 3 , wherein the main purge air passage comprises a plurality of second outlets at a second end of the prefilmer surface opposite the plurality of radial fuel ports.

5 . The nozzle of claim 1 , wherein the main purge air passage is at least partially disposed on a backside of the prefilmer surface.

6 . The nozzle of claim 1 , wherein the main purge air passage comprises an annular slot.

7 . The nozzle of claim 1 , wherein the plurality of radial fuel ports comprise varying diameters.

8 . The nozzle of claim 1 , further comprising a pilot fuel passage.

9 . The nozzle of claim 8 , further comprising a plurality of pilot purge air passages disposed between the plurality of radial fuel ports.

10 . The nozzle of claim 9 , wherein the plurality of pilot purge air passages comprise varying diameters.

11 . A liquid fuel nozzle for a dual fuel combustor, the nozzle comprising:
a main fuel passage; a plurality of radial fuel ports in communication with the main fuel passage; a prefilmer surface in communication with the plurality of radial fuel ports; a main purge air passage in communication with the plurality of radial fuel ports and the prefilmer surface; a pilot fuel passage; and a plurality of pilot purge air passages disposed between the plurality of radial fuel ports.

12 . The nozzle of claim 11 , further comprising a radial lip spaced apart from the prefilmer surface and disposed about the plurality of radial fuel ports.

13 . The nozzle of claim 11 , wherein the main purge air passage comprises a first outlet at a first end of the prefilmer surface adjacent to the plurality of radial fuel ports.

14 . The nozzle of claim 13 , wherein the main purge air passage comprises a plurality of second outlets at a second end of the prefilmer surface opposite the plurality of radial fuel ports.

15 . The nozzle of claim 11 , wherein the main purge air passage is at least partially disposed on a backside of the prefilmer surface.

16 . The nozzle of claim 11 , wherein the main purge air passage comprises an annular slot.

17 . The nozzle of claim 11 , wherein the plurality of radial fuel ports comprise varying diameters.

18 . The nozzle of claim 11 , wherein the plurality of pilot purge air passages comprise varying diameters.

19 . A system, comprising:
a combustor in a gas turbine engine; and a nozzle disposed within the combustor, the nozzle comprising:
a main fuel passage;
a plurality of radial fuel ports in communication with the main fuel passage;
a prefilmer surface in communication with the plurality of radial fuel ports; and
a main purge air passage in communication with the plurality of radial fuel ports and the prefilmer surface.

20 . The system of claim 19 , further comprising:
a pilot fuel passage; and a plurality of pilot purge air passages disposed between the plurality of radial fuel ports.

Assignees

• Gen Electric

Inventors

• Shershnyov Borys
• Myers Geoffrey David
• Gerasimov Alexey Yurievich
• Draisey Michael

Classifications

• F23D2900/11101

  Pulverising gas flow impinging on fuel from pre-filming surface, e.g. lip atomizers · CPC title

• F23D11/16

  in which an emulsion of water and fuel is sprayed · CPC title

• F23D11/106

  medium and fuel meeting at the burner outlet · CPC title

• F23R3/36 Primary

  Supply of different fuels · CPC title

• F23D11/38

  Nozzles; Cleaning devices therefor · CPC title