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Title: Fuel control for gas turbine with continuous pilot flame

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.

Inventors:
 [1]
  1. (Indianapolis, IN)
Issue Date:
OSTI Identifier:
864632
Patent Number(s):
4394811
Assignee:
General Motors Corporation (Detroit, MI) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fuel; control; gas; turbine; continuous; pilot; flame; improved; engine; distribution; including; pump; drawing; source; supplying; line; main; nozzle; improvement; loop; outlet; inlet; bypass; electronically; controlled; throttle; valve; restrict; flow; demand; exists; permit; substantially; unrestricted; minimum; downstream; maintain; pressure; ahead; branch; tube; orifice; feedback; operative; constant; differential; fuel nozzle; flow valve; main fuel; pilot flame; fuel distribution; control loop; substantially constant; turbine engine; gas turbine; pressure differential; constant pressure; fuel flow; improved fuel; minimum pressure; restrict flow; pump inlet; fuel control; maintain constant; electronically controlled; continuous pilot; /60/

Citation Formats

Swick, Robert M. Fuel control for gas turbine with continuous pilot flame. United States: N. p., 1983. Web.
Swick, Robert M. Fuel control for gas turbine with continuous pilot flame. United States.
Swick, Robert M. Sat . "Fuel control for gas turbine with continuous pilot flame". United States. https://www.osti.gov/servlets/purl/864632.
@article{osti_864632,
title = {Fuel control for gas turbine with continuous pilot flame},
author = {Swick, Robert M.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

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