远征三号上面级轨控发动机研制及在轨验证

Development and in-orbit verification of orbit-control engine in YZ-3 upper stage

综述了国内外上面级及其轨控发动机技术发展情况。基于远征三号上面级的任务特点,提出了5000 N轨控发动机技术方案,着重介绍了5000 N发动机的地面试验和首次飞行应用情况,总结了远征三号上面级轨控发动机研制经验,供类似火箭发动机研制参考。远征三号上面级5000 N发动机采用挤压式推进剂供应系统、直流式喷注器、再生冷却方案和复合材料喷管延伸段,具有结构简单、多次启动能力强、双向摇摆角度大等优势,于2018年12月29日进行了首次飞行应用。

The technical development of the upper stage and its orbit-control engine at home and abroad is reviewed in this paper.Based on the mission characteristics of YZ-3 upper stage,the technical scheme of 5000 N upper stage engine is put forward,focusing on its ground tests and the first flight application.The development experience of YZ-3 upper stage engine is summarized for the reference of similar rocket engine development.Since the 5000 N upper stage engine of YZ-3 adopts the extruded propellant supply system,orifice injector,regenerative cooling and C/SiC composite nozzle,it has the advantages of simple structure,multiple ignitions,large scale two-way swing.The first application flight was carried on December 29,2018.