组 合 循 环 发 动 机 技 术 研 究 进 展

The lower-cost,maneuverable,faster,and reliable earth/orbit transportation system is an inevitable trend in the development of future aerospace technology,which puts forward a strong demand for propulsion systems with wide speed range,large airspace,high specific impulse,and high thrust to weight ratio. Combined cycle power is an ideal power plant for future advanced aerospace transportation systems by efficiently combining different power modes,fully leveraging the performance advantages of each type of propulsion within its working range,and achieving outstanding comprehensive performance throughout the entire mission profile. For the combined cycle propulsions which have the most promising development prospects,especially the rocket based combined cycle,this article re⁃ views their research progress,analyzes their technological development characteristics and breakthroughs achieved, and proposes the main development directions and suggestions for the future development of rocket ramjet combined cycle engines.