同步轨道遥感器热设计和热分析

为解决遥感器在同步轨道环境温度场分析中热传导与热辐射的综合处理问题,热传导模型温度计算采用控制容积方法建立有限差分方程;热辐射模型采用奥本海姆方法计算设备表面单元之间辐射换热;根据是否被遮挡,辐射换热中表面单元角系数的计算分别采用积分和数值方法。计算结果表明,采用上述方法进行温度场分析能够有效解决热传导模型与热辐射模型的耦合,求解精度较高,遥感器设备部件稳态分析温度分布和在轨瞬态分析温度曲线变化清楚,可作为进一步精密热控设计的依据。

Thermal Control Design and Analysis of Remote Sensor Onboard Geostationary Satellite

A thermal model of a remote sensor onboard the geostationary satellite was established to meet the high quality requirements in thermal analysis of the space remote sensor and dispose heat radiation and heat conduction in orbit.The temperature distribution of the remote sensor instrument was calculated based on the advanced finite difference method with control volume approach,which can deal with the radiation boundary condition efficiently.The Oppenheim' s method was used to calculate the radiation heat transfer inside the remote sensor and the calculation of radiation view factor of boundary surface was based on a blockage criterion.The thermal control design for the remote sensor was presented,which contributed to its channel registration and focus stability.The steady and transient analyses were performed to obtain the temperature response of the remote sensor scan mirror.