低气压温控设备的舱内环境温度影响因素分析  

The influence factors of environmental temperature in the chamber of low pressure and temperature control facility

作　　者：何超[1] 李高[1] 丁文静[1] 李昂[1] 顾磊[1] HE Chao;LI Gao;DING Wenjing;LI Ang;GU Lei(Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China)

机构地区：[1]北京卫星环境工程研究所,北京100094

出　　处：《航天器环境工程》2017年第4期434-438,共5页Spacecraft Environment Engineering

摘　　要：低气压温控设备用于模拟临近空间低气压和高低温环境,低气压环境的温度场控制是低气压温控设备的关键指标,也是设计难点。文章首先通过Fluent软件对无风扇扰动的低气压舱中的环境温度进行数值仿真,研究热沉开孔对舱内环境温度的影响;在低气压舱模型中增加风扇模型,分析强制换热对低气压舱内环境温度的影响。通过在低气压温控设备中进行的无强制对流的温度控制试验,研究此时空间温度的降温速率、试验舱压力和舱内试件工装对舱内环境温度的影响。数值计算和试验研究结果表明,热沉开孔、扰动风扇、试验舱压力和试件工装均对低气压舱内环境温度有影响,在低气压温控设备的研制中,需综合考虑上述因素。The low pressure and temperature control facility can be used to simulate the environment of thenear space,characterized by low pressure and high&low alterating temperature.First,the control of thetemperature field concerns a main technical specification of the low pressure and temperature control system,which is relatively difficult.The environmental temperature in the low pressure chamber without fan isnumerically simulated by the software Fluent,and the effect of the opening hole in the heat sink on theenvironment temperature inside the chamber is studied,then the fan model is added to the low pressure chamber,and the effect of the forced-convection heat transfer on the low pressure chamber is analyzed.The temperaturecontrol test in the low pressure chamber without the forced-convection heat transfer is completed,to evaluate theinfluening factors such as the cooling rate,the chamber pressure,and the test pieces and the toolings.Simulationand test result all indicate that the hole in the heat sink,the disturbance of fan,the pressure of the chamber,andthe test fixtures all have some effect to the environmental temperature of the low pressure chamber.Thosefactors should be considered integratedly in the development of low pressure and temperature control facility.

关 键 词：低气压 温控 数值仿真 FLUENT 

分 类 号：V416.5[航空宇航科学与技术—航空宇航推进理论与工程] TP3[自动化与计算机技术—计算机科学与技术]