COMPOUND CYCLE ENGINE

摘要

A compound cycle engine (10) having an output shaft; at least two rotary units (12) each defining an internal combustion engine, a first stage turbine (26), and a turbocharger (18) is discussed. The first stage turbine (26) includes a rotor in driving engagement with the output shaft between two of the rotary units (12). The exhaust port of each rotary unit (12) is in fluid communication with the flowpath of the first stage turbine (26) upstream of its rotor. The outlet of the compressor (20) of the turbocharger (18) is in fluid communication with the inlet port of each rotary unit (12). The inlet of the second stage turbine (22) of the turbocharger (18) is in fluid communication with the flowpath of the first stage turbine (26) downstream of its rotor. The first stage turbine (26) has a lower reaction ratio than that of the second stage turbine (22). A method of compounding at least two rotary engines is also discussed.