TURBO COMPRESSOR FOR BLEED AIR

摘要

A disclosed bleed air system utilizes high pressure air from a high pressure compressor to drive the turbo compressor to increase a pressure of bleed air drawn from the low pressure compressor. Air drawn from the low pressure compressor is at a lower temperature and pressure than that encountered from the high pressure compressor. The turbo compressor increases the pressure of airflow and provides that airflow into the main bleed air passage to be communicated to systems utilizing the bleed air.

主权项

1. A bleed air system for a gas turbine engine comprising:
a main passage communicating air to an aircraft system; a turbo compressor driven by a turbine; an inlet to the turbo compressor communicating air from a first compressor location at a first pressure; an inlet to the turbine communicating air from a second compressor location at a second pressure higher than the first pressure for driving the turbine; and an outlet from the turbo compressor communicating air at a third pressure greater than the first pressure to the main air passage.