卫星表面隔热材料红外辐射的数值分析

以卫星表面隔热材料物理模型为基础,考虑了隔热材料中的辐射换热以及间隔物和残留气体的导热情况下,建立起隔热材料温度计算模型.卫星表面红外辐射包括隔热材料外表面自身红外辐射和反射空间环境辐射.最后,结合具体的卫星运行轨道,计算了隔热材料的温度场和红外辐射.结果表明,卫星红外辐射主要集中在远红外波段,而且其中反射地球辐射占近45%.

Numerical analysis on the infrared radiation of multilayer insulation outside the satellite

Base on the physical model of multilayer insulation(MLI) outside the satellite,the temperature model of MLI was established,considering the radiation heat transfer,solid thermal conduction and residual gas conduction.The infrared radiation of MLI included self-radiation and space environment radiation.At last,combined with the given orbit,the temperature field and infrared radiation was obtained.The calculation result showed the most energy of infrared radiation was concentrated on far infrared radiation band,and the energy of reflecting the earth infrared radiation accounted for 45% nearly.