关键词: 航天飞机主发动机;混合式发动机;航空航天飞机

Abstract: The thermodynamic duct jet engine of three model suceessively gets into pulse, ram and racket model in the same combustion chamber, when shuttle fly in the time that in lift-off,climbing to upper air and accelerate to more mach and into thin atmospheric air.Calculated. PRRD jet engine used liquids hydrogen meets one’s demands of thrust on all range from lift-off to orbit for single-stage vehicle of horizontal-take-off.

Key words: Space shuttle main engine;Compound engine;Aerospace plane