星载产品开机后的内部压力变化仿真研究  

Numerical Simulation of Internal Pressure Changes in Space Borne Products after Startup

作　　者：崔寓淏 孙立臣[1] 窦仁超[1] 史纪军[1] 齐嘉东 毕海林 王文丙 CUI Yuhao;SUN Lichen;DOU Renchao;SHI Jijun;QI Jiadong;BI Hailin;WANG Wenbing(Beijing Satellite Environmental Engineering Institute,Beijing 100094,China;School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]北京卫星环境工程研究所,北京100094 [2]合肥工业大学机械工程学院,合肥230009

出　　处：《真空科学与技术学报》2024年第8期668-672,共5页Chinese Journal of Vacuum Science and Technology

基　　金：基础加强技术领域基金(2022-JCJQ-0764)。

摘　　要：气体压力作为星载大功率产品开机运行的一个重要参数,会影响到产品的安全和在轨寿命。由于星载大功率产品开机后温度升高,部件放气会发生压力反弹现象,对产品安全带来隐患。文章从材料释气和内部气体扩散浓度随温度变化关系研究入手,基于某星载产品开机供电后温升引起的材料脱附气体增多,以烘烤温度,烘烤时长和静置的情景作为边界条件,计算了分子流状态下产品开机前后内部压力变化情况,并进行数值模拟。文章为星载产品空间环境下开机运行压力变化预估以及开机后是否存在安全隐患提供理论依据。Pressure,as an important parameter for the startup and operation of high-power spaceborne products,can affect the damage and in orbit lifespan of the products.Due to the temperature rise of high-power products on board the satellite after startup,pressure rebound may occur during component deflation,posing a safety hazard to the product.This article starts with the study of the relationship between the diffusion concentration of gas inside the material and temperature changes.Based on the increase in material desorption gas caused by the temperature rise after the power supply of a certain space borne product is turned on,different baking temperatures,baking times,and scenarios are used as boundary conditions to calculate the internal pressure changes of the product before and after turning on under molecular flow conditions,and numerical simulations are conducted.This article provides a theoretical basis for predicting the pressure changes during startup operation and designing exhaust ports in the space environment of microsatellite products.

关 键 词：真空度 航天器 真空放电 压力预测 

分 类 号：TB752[一般工业技术—真空技术]