关键词: 液体推进剂火箭发动机;加力燃烧;启动

Abstract: Start-up is the important and difficult aspect during liquid rocket engine development. The main ways to solve this problem of large thrust stage combustion engine are: control the mixture ratio of preburner in acceptable range by regulating the fuel flow rate in preburner, and control the acceleration time of engine during start-up; higher preburner pressure during combustion chamber ignition stage is necessary, at the same time acceleration of chamber pressure should be limited by setting throttle on combustion chamber fuel supply line. Higher inlet propellant pressure is helpful for self-start engine. These methods were applied to a stage combustion rocket engine to solve the problems, and will supply reference for the similar category engine development.

Key words: Liquid propellant rocket engine;Afterburning;Starting