不同水冰含量模拟月壤导热特性试验研究

doi:10.3724/1000-6915.jrme.2025.0956

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摘要针对月球极区水冰探测与资源利用的需求，系统研究模拟月壤(IRSM-L1)在真空环境下的导热特性。采用瞬态平面热源法，测试并分析干密度、真空压力、温度及水冰饱和度对导热系数的影响规律。结果表明，在低于10−² Pa的真空压力条件下，干密度对导热系数影响不显著；而在1～10? Pa范围，导热系数随气压升高显著增大，主要由于气体分子碰撞传热的增强。温度对导热系数的影响受气压调控：在高真空下，导热系数随温度升高而增大；但在较大的真空压力条件下，气体导热成为主导，导热系数主要受气体压力的影响，此时导热系数随真空压力的升高而升高。通过对比湿混法与冰粉法制备的样品，揭示了水冰赋存形态对导热特性的关键影响：冰粉法中冰颗粒呈点接触分布，导热系数随饱和度缓慢线性增长，导热机制以串联为主；而湿混法则呈现三阶段非线性增长特征，其中20%～80%饱和度区间因连续冰桥网络的形成，导致导热系数急剧上升，导热机制更接近几何平均。研究结果为月球极区含水冰月壤的热物性分析及水冰赋存状态识别提供了重要试验依据。

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	郭梁1
	潘鹏志1
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	董毅1
	2*

关键词 ：土力学, 模拟月壤, 导热系数, 水冰饱和度, 水冰赋存状态

Abstract：To meet the demands for water ice detection and resource utilization in the lunar polar regions, this paper systematically investigates the thermal conductivity of simulated lunar regolith (IRSM-L1) under vacuum conditions. Utilizing the transient plane source method, the effects of dry density, vacuum pressure, temperature, and water ice saturation on thermal conductivity were analyzed. The results indicate that at vacuum pressures below 10?² Pa, dry density does not significantly influence thermal conductivity. Conversely, within the pressure range of 1 to 10? Pa, thermal conductivity markedly increases with rising pressure, primarily due to enhanced heat transfer through molecular collisions of gas. The temperatures impact on thermal conductivity is modulated by gas pressure: under extremely high vacuum conditions, thermal conductivity increases with temperature. However, at higher vacuum pressures, gas conduction becomes the dominant mechanism, with thermal conductivity primarily governed by pressure, increasing as vacuum pressure rises. By comparing samples prepared using the wet-mixing method and the ice-powder method, the critical role of water ice morphology on thermal conductivity was revealed. In the ice-powder method, ice particles are distributed in point contacts, resulting in a gradual linear increase in thermal conductivity with saturation, dominated by a series conduction mechanism. In contrast, the wet-mixing method exhibits a three-stage nonlinear growth pattern, characterized by a sharp rise in thermal conductivity within the 20% to 80% saturation range due to the formation of continuous ice-bridge networks, where the conduction mechanism aligns more closely with the geometric mean model. These findings provide important experimental evidence for analyzing the thermal properties of water ice-bearing lunar regolith in polar regions and for identifying the occurrence state of water ice.

Key words： soil mechanics lunar regolith simulant thermal conductivity water-ice saturation water-ice occurrence mode

引用本文:

郭梁1，潘鹏志1，2，董毅1，2*. 不同水冰含量模拟月壤导热特性试验研究[J]. 岩石力学与工程学报, 2026, 45(S1): 437-448.
GUO Liang1, PAN Pengzhi1, 2, DONG Yi1, 2*. Thermal conductivity of lunar regolith simulants with varying water-ice content. , 2026, 45(S1): 437-448.

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https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2025.0956 或 https://rockmech.whrsm.ac.cn/CN/Y2026/V45/IS1/437

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