关键词: 涡轮风扇发动机;超音速流;性能分析

Abstract: The supersonic through flow(STF)fan engine is a new concept with many advantages. To carry out the cycle analysis for STF fan engine, a computer program system for evaluating engines’thermodynamic quality and optimizing its cycle variables has been developed. The program can be used for general turbofan and turbojet engines. Then, a STF fan engine equipped for a transport with cruise Mach number 2.7 was studied,the main results are as follows.At cruise condition,the specific fuel consumption is 2 %(or more) lower for STF fan engine than conventional turbofan engine and 8%(or mo-re)lower for STF fan engine than turbojet engine. At takeoff condition,STF fan engine also has lower specific fuel consumption advantages.Take a one stage 16 degree conical spike inlet as an example,when the entrance area of the STF fan inlet is designed at the takeoff state for a transport mission profile, the mass flow at other mission state can be also obtained fully.The good com- patibility of inlet with STF fan engin’e is the key for a high performance STF fan engine.

Key words: Turbofan engine;Supersonic flow;Performance analysis