Sundstrand Corporation

Sven B Sjoberg

Steven W Lampe

William Dean Treece

Gary Lester Goldberg

Paul A Schuh

Gary Paul Vavrek

Timothy David

Peter C Ingham

A method of starting a gas turbine (10) having a combustor (12) and a fuel supply system (14) supplying fuel to the combustor in accordance with the invention includes turning on a fuel valve (40) to control fuel flow to the combustor for combustion after a first starting condition (100) is reached; and cyclically turning (116) the main fuel valve on and off when a sensed exhaust gas temperature (114) initially reaches a first set temperature and continuing to cyclically turn the main fuel valve on and off until the sensed exhaust gas temperature falls to a second set temperature (118) lower than the first set temperature or until a second starting condition (102) is reached.

Process for starting a gas turbine and gas turbine

An airframe power unit for producing a power output in accordance with the invention includes a combustor (16) having a fuel injector (58) which injects fuel into the combustor which is combusted to form a gas stream (18); a turbine (12) driven by the gas stream from the combustor for producing the power output; an air supply (20) for providing pressurized gas containing oxygen blown down from a storage vessel (22) to the combustor which is used in the combusting of the fuel; a valve (24) disposed in the gas supply which controls a rate of supply of gas to the combustor in response to the control signal applied to the valve to cause the turbine to operate with a constant operational characteristic; a control for providing at least one control value (P.sub.S and S.sub.S) with each value specifying a desired operational parameter for use in producing the constant operational characteristic; a sensor (31 or 68) for sensing at least one operational parameter of the turbine; a difference circuit (32, 204, 404 or 504 ) for producing the control signal as a function of a difference of at least one control value and a corresponding sensed operational parameter; and a fuel control (50) for controlling the rate of injection of fuel by the fuel injector into the combustor.

Airframe power unit using stored air and jet fuel

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San Diego, CA, United States of America

Sven B Sjoberg