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航天器在空间环境模拟器内进行真空热试验时,各种非热沉结构均会产生附加热流。附加热流会造成热平衡试验中背景热流偏大,影响对整器热设计的验证;也会造成无法满足真空热试验所需的低温维持和降温速率要求,影响对航天器环境适应性的有效考核。文章分析总结了空间环境模拟器内造成附加热流的主要因素,提出了相应的改进措施,其中部分措施在试验中已成功应用。
Spacecraft in the space environment simulator vacuum thermal test, a variety of non-heat sink structure will generate additional heat flow. The additional heat flow will cause the background heat flow to be too large in the heat balance test, which will affect the verification of the thermal design of the whole device. This may also result in the inability to meet the requirements for maintaining and lowering the temperature required for the low-temperature vacuum heat test and effectively impacting the environmental adaptability of the spacecraft. The article analyzes and summarizes the main factors that cause additional heat flux in the space environment simulator, and puts forward corresponding improvement measures. Some of the measures have been successfully applied in the experiment.