摘要
为了评估某航天电子设备在轨工作情况下的冷凝结露风险,采用数值仿真方法对其进行热分析。通过对该设备进行地面试验验证来标定设备工作时的对流换热边界条件,校准热分析的数值仿真模型。根据在轨工作的特性,对相应的数值仿真模型进行分析,得到不同工况条件下设备上的温度分布,以及不同参数条件下的温度变化规律,从而评估设备冷凝结露的风险。数值仿真结果表明,现有设计无法避免在轨工作时设备内部冷凝结露,通过增加1~1.2 mm厚度的隔热垫可以达到相应的设计要求。
In order to evaluate the condensation risk of an aerospace electronic equipment on⁃orbit,numerical simulation method is used to perform thermal analysis.The ground test of equipment was used to calibrate the convection heat exchange boundary conditions of equipment during operation and to correct the numerical simulation model of thermal analysis.According to the characteristics of on⁃orbit working,the corresponding model was analyzed to obtain the temperature distribution of equipment under different working conditions and the temperature change law under different parameter conditions,so as to evaluate condensation risk of equipment.Numerical simulation results show that the existing design can’t avoid condensation inside the equipment on⁃orbit,and the corresponding design requirements can be achieved by adding a heat insulation pad with 1~1.2 mm thickness.
作者
彭扬林
马爱军
刘洪英
焦飞飞
王栋
PENG Yanglin;MA Aijun;LIU Hongying;JIAO Feifei;WANG Dong(China Astronaut Research and Training Center,Beijing 100094,China)
出处
《电子设计工程》
2022年第18期52-57,共6页
Electronic Design Engineering
关键词
航天电子设备
热分析
数值仿真计算
对流换热
流固耦合传热
微重力
aerospaceelectronicequipment
thermalanalysis
numericalsimulationcalculation
convection heat exchange
fluid⁃solid coupled heat transfer
micro⁃gravity
