Cooling of the rim of a gas turbine rotor disk

摘要

Cooling air delivery systems (12) for gas turbine engines (10) are used to increase component life and increase power and efficiencies. The present system (12) increases the component life and increases efficiencies by better utilizing the cooling air bled from the compressor section (20) of the gas turbine engine (10). For example, a flow of cooling air (66) which is directed through internal passages (100,106) of the engine (10) and into a cavity (90) and is used to cool the interface between a turbine disc (52) and a plurality of turbine blades (74) and further reduces ingestion of hot power gases into the internal portion of the gas turbine engine (10). The cavity (90) has a generally tapered configuration and effectively cools the interface between the disc (52) and the blade (74). Thus, increasing component life and increasing power and efficiencies of the engine (10).