Engine blled air with compressor surge management
AssigneeUnited Technologies Corporation
InventorsStephen H. Taylor, Charles E. Lents, Gabriel L. Suciu, Brian D. Merry, Jesse M. Chandler
Life of this patent
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Abstract
A gas turbine engine includes a main compressor section. A booster compressor includes an inlet and an outlet. The inlet receives airflow from the main compressor section and the outlet provides airflow to a pneumatic system. A recirculation passage is between the inlet and the outlet. A flow splitter valve controls airflow between the outlet and the inlet through the recirculation passage for controlling airflow to the pneumatic system based on airflow output from the booster compressor. A bleed air system for a gas turbine engine and a method of controlling engine bleed airflow are also disclosed.
Claims19
A gas turbine engine comprising;
- a main compressor section;
- a booster compressor including an inlet and an outlet, the inlet receiving airflow from the main compressor section and the outlet providing airflow to a pneumatic system;
- a recirculation passage between the inlet and the outlet;
- and
- a flow splitter valve controlling airflow between the outlet and the inlet through the recirculation passage for controlling airflow to the pneumatic system based on airflow output from the booster compressor.
A bleed air system for a gas turbine engine, the bleed air system comprising:
- a booster compressor including an inlet and an outlet, the inlet receiving airflow from a main compressor section of the gas turbine engine and the outlet providing airflow to a pneumatic system;
- a recirculation passage between the inlet and the outlet;
- and
- a recirculation valve controlling airflow between the outlet and the inlet through the recirculation passage for controlling airflow to the pneumatic system.
A method of controlling engine bleed airflow comprising:
- configuring a booster compressor to receive engine bleed air from a main compressor section of gas turbine engine through an inlet;
- compressing the engine bleed air from the main compressor with the booster compressor and supplying the compressed engine bleed air to an outlet passage;
- and
- controlling airflow from the outlet passage to a pneumatic system with a recirculation path by directing airflow between from the outlet passage to the pneumatic system and a recirculation passage, wherein airflow through the recirculation passage is supplied to the inlet of the booster compressor.
Dependencies are inferred from the claim text.