计算近地轨道航天器空间外热流的RUD方法  

Numerical Computation of External Heat Flux of Low Earth Orbit Spacecraft by RUD

作　　者：张涛[1] 孙冰[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《宇航学报》2009年第1期338-343,共6页Journal of Astronautics

摘　　要：根据兰贝特定律推导了能束在辐射半球面上均匀分布的外热流计算公式。采用三角形网格统一表示边界面并根据边界面网格进行遮挡判断。根据面元间互视和遮挡关系,对无遮挡表面所受外热流采用积分法进行计算,被遮挡部分的地球反照和地球红外热流采用能束均匀分布法进行计算。计算结果表明,该方法的计算效率和精度都明显高于蒙特卡洛法;互视和遮挡判断方法准确高效。Based on Lambert＇ s law, the formulas of external heat flux computation of ray uniform distribution on radiant semi - sphere were deduced. Triangle mesh was used to express outline of complicated configuration and judge shading. According to position of surface cells, external heat flux was computed with integral method for no shaded surface and with ray uniform distribution for shaded surface. It was demonstrated by a comparison with Monte Carlo method that the computing precision and efficiency of this method is higher and mutual watching and shading judgment method is correct and high efficient.

关 键 词：外热流 遮挡判断 能束均匀分布 积分法 蒙特卡洛法 

分 类 号：V423.41[航空宇航科学与技术—飞行器设计]