折叠状航天器太阳电池阵在轨热分析(Ⅰ)——计算模型

将太阳电池板蜂窝芯子、面板和硅电池片中发生的辐射－传导复合传热过程等效为一个无内热源的三维瞬态热传导问题。根据电池板的材料、尺寸及结构形态导出太阳电池板的三维等效导热系数。针对任意两相邻电池板表面间的热辐射交换规律，构造适用于这表面内节点温度的离散方程系数。研究折叠状态太阳电池阵边界节点的热特点时，仔细考虑了地球红外辐照、地球的太阳反照、太阳辐射加热、航天器舱体几何遮挡、深冷环境散热、飞行轨道高度及航天器在太阳－地球系中不同位置等造成的影响。利用本文给出的方程，可以求出展开前在轨折叠状太阳电池阵三瞬态不稳定温度场。

Thermal analysis for folded solar array of spacecraft on orbit(Ⅰ)——calculation model

The combined radiation conduction taking place in solar panels is treated as a three dimensional transient conduction.The equivalent conductivities in three directions are obtained by means of the material,size,construction of solar panels.According to the radiative characteristics between two adjacent surfaces of the solar array,the discrete equation coefficients of the nodes between them are obtained.When the thermal characteristics of boundary nodes in the folded solar panels is studied,some influence factors are considered carefully such as the earth infrared radiation,the solar radiation,the earth reflection for the sunlight,the spacecraft cabin,the heat loss of solar panels in space deep cold environment,the orbit altitude and spacecraft location in the system of sun earth.The transient temperature distribution of the solar array is obtained by the given model before its spreading.