Power plants – Combustion products used as motive fluid – Different fluids
Patent
1975-12-01
1976-11-16
Croyle, Carlton R.
Power plants
Combustion products used as motive fluid
Different fluids
F02C 726
Patent
active
039915581
ABSTRACT:
An engine start control circuit and fuel system for a gas turbine engine with a burner having a prevaporization chamber has metered fuel flow through a pilot and main fuel flow system in which a pilot nozzle of the air assist type is used to ignite fuel from a main fuel manifold that is supplied to the prevaporization chamber as a wall film of fuel. Control means are provided to energize the pilot fuel system to light the main fuel when the burner inlet temperature is below a predetermined set temperature corresponding to a temperature at which good fuel vaporization will occur on the walls of the prevaporization chamber. The control means also includes means operative in response to higher burner inlet temperatures to produce start and ignition of the main fuel manifold into the prechamber. The fuel system including means operative when the pilot is igniting the main fuel flow to control minimum pilot fuel by establishing a controlled pressure differential across a regulating orifice in the pilot fuel system by means of a preset pressure control valve.
REFERENCES:
patent: 2667742 (1954-02-01), Kuzmitz
patent: 2694899 (1954-11-01), Hague
patent: 3057155 (1962-10-01), Rizk
patent: 3310937 (1967-03-01), Smith
Casaregola L. J.
Croyle Carlton R.
Evans J. C.
General Motors Corporation
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