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某上面级主发动机采用常温可贮存液体推进剂,采用泵压式供应方案,依靠起动箱式多次起动系统使发动机具备多次起动工作能力,在轨工作2天。为使发动机温度环境满足工作要求,对发动机进行了热控设计,热控方案采用被动热控措施为主、主动电加热措施为辅以及起动前排放的综合措施。发动机热控设计基于热网络仿真分析法,通过建立整机热分析模型预示发动机任务剖面温度变化,为发动机提供合理的热控设计方案。
A host engine above the level of liquid propellants can be stored at room temperature, the use of pump-type supply program, relying on the start-box-type multi-start system so that the engine has a number of start-up ability to work in orbit for 2 days. In order to make the engine temperature environment meet the work requirement, the thermal control design of the engine was carried out. The thermal control scheme mainly adopted the passive thermal control measures, supplemented by the active electric heating measures and the comprehensive measures before the start-up. Based on the thermal network simulation analysis method, the engine thermal control design is used to predict the temperature change of the engine mission profile through the establishment of a thermal analysis model of the whole engine, so as to provide a reasonable thermal control design scheme for the engine.