Fuel injector with purge passage

Details Fuel injector with purge passage Fuel injector with purge passage

1998-04-24

2000-06-13

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

With safety device

60742, F02C 722

Patent

active

060734361

ABSTRACT:
A gas turbine fuel injector has a fuel mixing barrel, including an air swirler incorporating a fuel flow outlet, suspended in the combustor air stream by a cantilevered injector body. The cantilevered body is mounted in the combustor wall and includes a fuel flow control valve in a valve chamber located in a part of the body in a relatively cool air surrounding the combustor. The fuel outlet is located towards the downstream end of the swirler barrel. A purge passage is provided from a location towards the upstream end of the barrel extending into the outlet side of the valve chamber. When fuel flow is shut-off a pressure differential between the upstream and downstream ends of the swirler barrel causes an air flow up the purge passage into the valve chamber and down the main fuel passage to purge residual fuel.

REFERENCES:
patent: 4305255 (1981-12-01), Davies et al.
patent: 4342198 (1982-08-01), Willis
patent: 4425755 (1984-01-01), Hughes
patent: 4938418 (1990-07-01), Halvorsen
patent: 5199265 (1993-04-01), Borkowicz
patent: 5243816 (1993-09-01), Huddas
patent: 5417054 (1995-05-01), Lee et al.

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