高真空低重力环境下液态工质排放地面模拟试验研究

Ground simulation test for the working fluid evacuation in high vacuum and low gravity environment

摘要: 针对航天器在空间高真空低重力环境下的流体回路液态工质排放有关问题，以月球环境为例，搭建了月球重力等效地面试验系统，开展地面真空排放试验，获取了工质排放过程中的管路压力和温度变化规律，分析了影响工质排放速率的因素。试验结果表明：工质排放过程中管路的温度基本不变，回路初始压力、工质沿程温度以及排放口温度对于排放速率的影响较小。

Abstract: To study the evacuation process of the working fluid for in-orbit spacecraft, a lunar gravity experimental system is built and the influence factors on the evacuation speed of the working medium are studied. The variation of the pressure and the temperature inside the pipelines are obtained in the process of the fluid evacuation. It is indicated that the pipeline temperature remains basically unchanged in the whole emission process, and that the initial pressure, the local temperatures and the outlet temperature all have little effect on the evacuation rate.