关键词: 液体推进剂火箭发动机;可变推力;发动机试验

Abstract: Considering the needs of attitude control of the space vehicle and maneuver trace of warheads of missiles, a bipropellant variable-thrust liquid rocket engine has been developed by the 11th research institute.In this qaper,the process of design and research and the performances of the engine are introduced. The engine can use many kinds of propellant, it’s thrust can be adjusted from 137.3 to 686.5N continously,the adjustment ratio is 5:1.The step response time of the engine is less than 80 ms,the O/F ratio error is less than ±5%.

Key words: Liquid propellant engine;Variable thrust;Engine test