月球坑内空间环境热流的分布研究

文章推导获得了月面阳光矢量和月球坑内探测器表面关系的表达式,采用蒙特卡罗法数值计算探测器各表面的辐射热流,分析了月球坑内环境辐射热流的分布特征.讨论了月面纬度、月球坑尺寸、月面发射率等参数对探测器表面热流的影响.计算表明:月面纬度增加及月球坑坑口半径的减小均会导致某些时刻阳光无法照射到坑底,从而与其他工况有较大的计算差别,两参数对探测器各面热流的影响规律不同;月面发射率对探测器表面热流的影响作用较大,增加月面发射率能明显降低探测器某些表面的辐射热流.

Analysis on Heat Flux Distribution in Lunar Craters

The relationship between the direction vectors of the sun light at the lunar surface and those at the detector surfaces in a lunar crater are derived through a coordinate transformation. Radiative heat fluxes at the detector surfaces are numerically computed using the Monte Carlo method, and the ambient radiative heat flux distribution in lunar craters is analyzed. Spacial and temporal distribution characteristics of radiative heat fluxes at the detector surfaces and the influences of some parameters on the flux distribution are discussed, including the lunar latitude, the crater diameter, the lunar surface emittance. Computational results show that both the increase in the lunar latitude and the decrease in the crater diameter will make the sun light unattainable in the crater bottom during a certain time periods, resulting a significant difference in the operating conditions. But these two parameters influence the detector surface fluxes in different ways. In addition, the detector surface fluxes are influenced significantly by the lunar surface emittance. With the increase in the lunar surface emittance, the radiative heat fluxes on certain detector surfaces decrease obviously.