关键词: 航天推进;涡轮风扇发动机;冲压式喷气发动机;混合式发动机

Abstract: A Preliminary study on the combined jet engines suitable for earth/orbit space transportation is made in this paper.Some evaluation of performance, size and weight of the engine is carried out and the transportation capadility of the space plane which will be powered this type of engines is also estimated.

Key words: Space propulsion;Turbofan engine;Ramjet engine;Compound engines