Double flow of compressed air for jet engine - has air cooled heat exchanger cooled from air from first compressor stage

摘要

The jet engine has a compressor first stage (1) which supplies air to the compressor second and subsequent stages (4a) and to the external duct (3). The compressed air passes through the duct (2) to the air cooled heat exchanger (8). supplied with colder air from the first stage (1). Further compression takes place in the intermediate and high pressure compressor stages (4B,5). The intermediate stage is driven by the expansion turbine (7) and the high pressure stage is driven by the expansion turbine (7') powered from the combustion chamber (6).