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针对基于单组元肼类物质为工质的液体姿轨控发动机差动活塞式燃气自增压系统,分析了系统的工作原理,提出了系统的参数设计方法,建立了系统的参数设计流程,给出了系统的起动压力计算模型和自锁状态计算方法,并进行了实例研究。结果表明:系统最低起动压力与压力放大贮箱气体腔初始体积、活塞摩擦力和推进剂贮箱初始气垫体积直接相关;系统自锁后,推进剂贮箱压力的设计状态受推进剂贮箱所允许的最大压力上偏差和流量调节器与推进剂贮箱间的压降所约束;推进剂贮箱的工作压力范围是可以根据需要通过燃气自增压系统的设计来保证的。
Aiming at the differential pressure gas piston orbit self-pressurization system based on single-component hydrazines as working fluid, the working principle of the system is analyzed. The parameter design method of the system is proposed and the parameter design flow of the system is established. The starting pressure calculation model and the self-locking state calculation method of the system are given, and examples are given. The results show that the minimum starting pressure of the system is directly related to the initial volume of the gas chamber of the pressure amplification tank, the friction force of the piston and the initial air cushion volume of the propellant tank. After the system is self-locking, the pressure of the propellant tank is designed by the propellant tank The maximum allowable deviation of the pressure and the pressure drop between the flow regulator and the propellant tank; the working pressure range of the propellant tank can be guaranteed by the design of the gas self-pressurizing system as required.