Fuel control for gas turbine with continuous pilot flame

Details Fuel control for gas turbine with continuous pilot flame Fuel control for gas turbine with continuous pilot flame

1981-06-22

1983-07-26

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Combined with regulation of power output feature

F02C 938

Patent

active

043948111

ABSTRACT:
An improved fuel control for a gas turbine engine having a continuous pilot flame and a fuel distribution system including a pump drawing fuel from a source and supplying a line to the main fuel nozzle of the engine, the improvement being a control loop between the pump outlet and the pump inlet to bypass fuel, an electronically controlled throttle valve to restrict flow in the control loop when main nozzle demand exists and to permit substantially unrestricted flow without main nozzle demand, a minimum flow valve in the control loop downstream of the throttle valve to maintain a minimum pressure in the loop ahead of the flow valve, a branch tube from the pilot flame nozzle to the control loop between the throttle valve and the minimum flow valve, an orifice in the branch tube, and a feedback tube from the branch tube downstream of the orifice to the minimum flow valve, the minimum flow valve being operative to maintain a substantially constant pressure differential across the orifice to maintain constant fuel flow to the pilot flame nozzle.

REFERENCES:
patent: 3085397 (1963-04-01), Jubb et al.
patent: 3238993 (1966-03-01), Smith
patent: 3808801 (1974-05-01), Taylor
patent: 3958414 (1976-05-01), Smith

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