双探针法测量月壤热物性参数的影响因素分析

针对双探针法测量月壤热物性过程，建立了探针与月壤组成的多层介质在太阳辐照加 热与月表辐射散热作用下的二维非稳态传热模型。通过数值模拟，分析了探针长度、直径、 中心间距和加热功率等因素对测量结果的影响。结果表明，若月壤导热系数在0.01W／
(m·K)左右，则月壤的弱导热性是双探针探测设计中需考虑的主要因素。在上述分析的基 础上，设计了双探针结构，对一导热性能较差的松散介质进行了地面测量实验，通过试错法 反演测量数据得到该介质的热扩散率与导热系数，为进一步应用研究提供了参考。

The Influence Factor Analysis for a Dual-sensor Probe to Measure the Lunar Soil's Thermal Properties

Two-dimension unsteady heat transfer model for the probe and lunar regolith was established with considering the radiation effect of the lunar surface, in control of the process for the thermal properties measured by a dual-sensor probe. By nu-merical simulation, the research contents contained the effect of the measurement related to length of the probe, diameter of the probe, distant between two probes and heat plus flux for the heated probe were analyzed. The results showed that, assumption the conductivity of the lunar regolith is about 0.01W/(m·K), the most important influence factor for the dual - sensor probe to mea-surement was the low conductivity. Based on the former results, a dual-sensor probe was developed, and a loose medium with low conductivity was experimented. The thermal properties of the medium were obtained through inverse problems method with trial-and-error method, and it would provide reference for the further research.