关键词: 涡轮风扇发动机;冲压式喷气发动机;混合式发动机;航空航天飞机;设计;研究

Abstract: A Preliminary design study for separate turbofan-ramjet engine was conducted. Choices of engine configuration, selection of design parameters, including of bypass ratio, pressure ratio, temperature before turbine and type of fuel etc, and operat- ing mode of turbofan-ramjet engine were discussed.The calculation of examples indicates the effect of differnt design parameters on engine performance. In addition, the effect of use of common inlet on engine performance was analysed.

Key words: Turbofan engine;Ramjet engine;Compound engine;Aerospace plane;Design;Research