月球表面及月壤内温度分布特征的数值模拟

文章建立了月表辐射与月壤内二维非稳态导热的耦合传热模型,采用控制容积法数值模拟月壤内的温度分布,主要研究了月表、月壤内温度的分布和变化规律及探测器对局部月表温度的影响.计算结果表明一昼夜期间月壤内存在明显的温差:浅层月壤处的昼夜温差较大且受纬度的影响明显;随着深度的增加,月壤昼夜温差降低并趋于稳定,且受纬度的影响较小.探测器的存在遮挡了月表接受的太阳辐射,导致其阴影区域内月表温度发生突变,新的平衡温度接近探测器底面温度,且受探测器驻留时间的影响较小;当探测器移开,月表温度又迅速恢复到原有的变化规律.

Numerical simulation for the temperature distribution characteristics on the lunar surface

A coupled heat transfer model is established in consideration of the radiation from the lunar surface and two-dimensional unsteady heat conduction in the lunar soil. The controlled volumetric method is used to simulate the temperature distribution in the lunar soil.The temperature distribution and its variations on the lunar surface and in the lunar soil are discussed,and the effects of the rover on the lunar surface temperature are analyzed.The results show that the temperature difference on the lunar surface varies significantly with the local time and latitude.As one goes deeper under the surface,the temperature difference decreases and becomes increasingly steady and less affected by the latitude.The area of lunar surface in the rover's shadow is subjected to an abrupt temperature change.The final equilibrium temperature is equals to that at the bottom of the rover,which is not affected by the stay of rover.The temperature in this region will resume its normal value when the rover moves away.