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.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2009年第1期338-343,共6页
Journal of Astronautics
关键词
外热流
遮挡判断
能束均匀分布
积分法
蒙特卡洛法
External heat flux
Shading judgment
Ray uniform distribution
Integral method
Monte Carlo method
