EJECTOR CONTROLLED TWIN AIR SOURCE GAS TURBINE PRESSURIZING AIR SYSTEM

摘要

A passive pressurizing air system for a gas turbine engine comprises a flow path for directing an air flow having a low temperature and low pressure, extending through a cavity to a pressurized area of the engine. The cavity contains pressurized air having a high temperature and high pressure. Means are provided for adding the pressurized air from the cavity into the flow path to provide a mixed air flow having an intermediate temperature and intermediate pressure.