“长征五号”火箭液氧煤油发动机总体技术

General Technical Review of Long March 5 Liquid Oxygen Kerosene Engine

高压补燃液氧煤油发动机应用于“长征五号”(CZ-5)运载火箭助推模块,该发动机采用高压补燃循环,具有高性能、自身起动、大范围推力和混合比调节、结构紧凑等特点。回顾了“长征五号”助推液氧煤油发动机研制历程和技术方案特点,分析了液氧煤油发动机自身起动点火技术、双机并联大时差不同步关机技术、单机和双机并联发动机整机结构低频特性等研制中的发动机总体技术。提出了YF-100液氧煤油补燃发动机性能提升、结构轻质化、可靠性增长和全任务剖面环境适应性的改进方向,以及对高精度发动机在线故障诊断系统的需求。

High pressure staged combustion liquid oxygen kerosene engine is used in the boosters of Long March 5(LM-5,CZ-5)launch vehicle.The engine adopts high pressure staged combustion cycle,and has the characteristics of high performance,self-starting,wide range of thrust and mixing ratio adjustment and compact structure.In this paper,the development history and technical scheme characteristics of LM-5 launch vehicle’s liquid oxygen kerosene engine are reviewed.The key technologies in the development of the parallel mode engines are analyzed emphatically,such as self-starting ignition technology,large time difference asynchronous shutdown technology and low frequency characteristics of structure in YF-100 engine single mode and two-engine parallel mode.The improvement of performance enhancement,structure lightening,reliability growth and full mission environmental adaptability for YF-100 engine,as well as the demand for high-precision online fault diagnosis system for liquid oxygen kerosene engine,is proposed.