空间推进系统在轨有关热控问题分析

Analysis on the thermal control problems of space booster sub-system in orbit

文章基于空间推进系统热控的特点,针对长期在轨航天器推进系统热控面临的贮箱膜片热胀冷缩疲劳和机组阀门超温问题进行机理分析,归纳贮箱热控和发动机、推力器高温工况相应的解决措施及难点,结合某型号实际提出解决方案,并对改进后的效果进行分析预示,给出长期在轨航天器热控方案设计建议。

Based on the structural characteristics of spacecraft propulsion sub-subsystem,the considerations in the thermal control of the subsystem are introduced.The problems focus on the thermal cycling fatigue of the diaphragm of the propellant tank,and the overheating of the valves with respect to the spacecraft of long service life.The general temperature control measures for both the active expulsion tank and the engine and thruster in the HT condition are expounded with discussion of the engineering difficulties.Then,an actual example is given with analytical predictions.Suggestions are made of the design of thermal control subsystem for long-life spacecrafts.