Hamilton Sundstrand Corporation

United Technologies Corporation

Andre M Ajami

Kenneth W Winston

Xiaolan Hu

David Lloyd Ripley

Walter Ainslie

Victor Pascu

Mujtaba T Saifuddin

Eric L Wolff

Jason Eric Turner

Brent L Sherrill

Nelson Dacunha

Phillip Vessa

A method for controlling fuel flow to a gas turbine engine during starting includes monitoring acceleration of the gas turbine engine to determine actual acceleration value, and calculating a fuel flow rate for a setpoint acceleration using the actual acceleration value as a factor. The method further includes commanding the calculated fuel flow for the setpoint acceleration to the gas turbine engine.

Method of acceleration control during APU starting

An example method of fuel delivery to a turbomachine includes reaching a light-off speed of a turbomachine and delivering fuel to a combustor of the turbomachine at a first rate. The method also increases the rate of the delivery. The combustor achieves light-off at a fuel flow rate on or in-between the first rate and a second rate that is greater than the first rate. An example turbomachine fuel delivery assembly includes a fuel delivery component and a controller configured to adjust the fuel pump to increase a rate of fuel delivery from a fuel supply to a combustor of a turbomachine.

Turbomachine fuel delivery method and assembly

A method of starting a gas turbine engine includes maintaining the gas turbine engine at the dwelling speed after light-off until a predetermined magnitude of combustor warm-up is determined then increasing the speed of the starter motor to accelerate the gas turbine engine after the predetermined magnitude of combustor warm-up is achieved.

Starting a gas turbine engine to maintain a dwelling speed after light-off

A method for controlling a flow of fuel to a starting gas turbine engine includes controlling the flow of fuel to the engine by controlling fuel pressure to the engine, and modulating the flow of fuel to the engine if engine exhaust gas temperature approaches a given exhaust gas temperature to lower the engine exhaust gas temperature below the given exhaust gas temperature.

Fuel control method for starting a gas turbine engine

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Spring Valley, CA, United States of America

Andre M Ajami