泵压式发动机精细化热分析技术

上面级泵压式发动机结构复杂、经历的热环境复杂多变,须通过严格的热控设计以保证飞行过程中发动机部组件温度在合适范围内,因此研究泵压式发动机的温度变化规律对发动机研制具有重要作用。文章在分析上面级泵压式发动机热环境特点的基础上,提出了泵压式发动机的热分析建模方法,采用热网络法进行了泵压式发动机精细化热环境分析。通过发动机热平衡试验验证了热分析模型和方法的正确性,获得了发动机在飞行过程中的温度变化规律,可为后续泵压式发动机热分析提供参考。

Fine thermal analysis of turbopump-fed rocket engine

The turbopump-fed rocket engine used for the upper stage has a complex structure, and always subjects to extreme thermal environment variations. The thermal control system is usually designed to ensure all components of the engine work in an appropriate temperature range. The knowledge of the heat transfer characteristics of the turbopump-fed rocket engine is crucial to the development of the engine. On the basis of analyzing the thermal environment of the engine, the thermal modeling method of the engine is proposed, and the thermal network method is employed to analyze the thermal environment characteristics of the engine. The accuracy of the thermal analysis method is evaluated by a comparison with the thermal balance test of the engine. After verification, the current thermal analysis model is used to analyze the thermal characteristics of the engine in the flight. The thermal analysis method developed in this paper can provide references for a further study of the thermal analysis of other turbopump-fed rocket engines.