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清华大学学报(自然科学版)  2023, Vol. 63 Issue (3): 433-448    DOI: 10.16511/j.cnki.qhdxxb.2022.26.052
  论文 本期目录 | 过刊浏览 | 高级检索 |
董泰郎1, 冯昱龙1, 黄伟2, 任德鹏3, 王志浩4, 王建山1, 崔玉红1
1. 天津大学 机械工程学院, 天津 300350;
2. 北京空间机电研究所, 北京 100094;
3. 北京空间飞行器总体设计部, 北京 100094;
4. 北京卫星环境工程研究所, 北京 100094
Abnormal phenomena of lunar dust transport near a light/dark junction region on the lunar surface
DONG Tailang1, FENG Yulong1, HUANG Wei2, REN Depeng3, WANG Zhihao4, WANG Jianshan1, CUI Yuhong1
1. School of Mechanical Engineering, Tianjin University, Tianjin 300350, China;
2. Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China;
3. Beijing Institute of Spacecraft System Engineering, Beijing 100094, China;
4. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China
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摘要 月表环境下,山脉或探测器和巡视器等附近形成的整体或局部明暗交界区域会发生月尘输运异常现象。该文通过建立整体和局部2种明暗交界模型,采用质点网格法和蛙跳法,基于Apollo探测器实测的月表月尘数量,研究了2种模型的月尘输运异常现象。结果显示,整体明暗交界区域存在非常显著的月尘输运异常现象,月尘输运路径呈现喇叭口形状或片状抛物线形状,并在明暗交界线上方发生大量月尘聚集,月尘输运现象具有明显的水平输运特征。在局部明暗交界区域的探测器左侧和右侧均出现非常显著的月尘输运异常现象,具有双向水平输运特征,并存在或大或小的双月尘涡旋,引起了探测器周围的局部“月尘暴”。整体明暗交界区域月尘输运异常现象可间接地验证“辉光”现象,局部明暗交界区域月尘输运异常现象也可能是月表探测器上沉积大量月尘的主要原因之一。月尘输运异常现象不但对现役的月球车和探测器等有潜在危害,也是人类在未来探月活动中无法回避的关键问题之一。该文研究的结果对月球探测器着陆点和巡视器行走路线的选取具有重要的参考价值,有助于降低月尘污染对人类探月活动的影响。
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关键词 月尘输运明暗交界异常现象探测器和巡视器质点网格法蛙跳法    
Abstract:[Significance] Neither a global atmosphere nor a magnetic field exists above the lunar surface. The lunar surface is exposed to high-energy ultraviolet radiation and solar wind, which charge a large amount of lunar dust to form high-potential, local electric fields. The lunar mountains, with a length of more than ten kilometers and a vertical height of several kilometers, block ultraviolet radiation from the sun, creating a whole light-dark junction region with a shadow region on the lunar surface. Meanwhile, the occlusion of the lunar surface by a detector or a rover also forms a local light/dark junction region under sunlight. Under the lunar environment, complex electric fields exist at the whole and local light-dark junction regions, which leads to the abnormal phenomenon of charged lunar dust transport. In this paper, the whole and local light-dark interface models were proposed, and the particle-in-cell method and leap-frog method were used to study the lunar dust transport anomalies of the two models based on measured data of the Apollo lunar dust samples. The results showed that a very significant abnormal phenomenon of lunar dust transport occurred in the whole and local light-dark interface models. First, the lunar dust transport path was bell-shaped or parabolic, and a large amount of lunar dust accumulated above the boundary in the whole light-dark interface model. Moreover, the lunar dust transport phenomenon had an obvious horizontal transport characteristic, and the horizontal transport velocity was approximately two to ten times that of the vertical direction. Particularly, the abnormal phenomenon of lunar dust transport at the junction between light and dark was more severe and more likely to occur in the whole light-dark interface model. Second, in the local light/dark interface model, significant anomalies of lunar dust transport were found on both the left and right side of the detector, where a large amount of lunar dust was transported bidirectionally from one side to another side, passing through the detector in the horizontal direction. In particular, a large or small lunar dust vortex rotated around both sides of the left and right detector, resulting in a local "moondust storm" around the detector with a number density of approximately 1.4×105 particles per cubic meter. This paper predicts the abnormal phenomenon of lunar dust transport for the whole light-dark junction region caused by mountain occlusion, which can indirectly verify the observed occurrence of the "horizontal glow" phenomenon. Abnormal transport of lunar dust in the local light-dark junction region may be one of the main reasons for the deposition of much lunar dust on the detector/rover and so on. The abnormal phenomenon of lunar dust transport is not only potentially harmful to the current lunar detector/rover and so on, but also a key problem that human exploration activities cannot avoid. The results of this study have not only an important reference value for selecting the landing site of a lunar detector and the traveling route of a rover but also helpful to reduce the lunar dust pollution caused by the detector/rover and so on.
Key wordslunar dust transport    light/dark junction region    abnormal phenomena    detector and rover    particle-in-cell method    leap-frog method
收稿日期: 2021-12-21      出版日期: 2023-03-04
通讯作者: 崔玉红,教授,      E-mail:
作者简介: 董泰郎(1996-),男,博士研究生。
董泰郎, 冯昱龙, 黄伟, 任德鹏, 王志浩, 王建山, 崔玉红. 月球环境下明暗交界处月尘输运异常现象[J]. 清华大学学报(自然科学版), 2023, 63(3): 433-448.
DONG Tailang, FENG Yulong, HUANG Wei, REN Depeng, WANG Zhihao, WANG Jianshan, CUI Yuhong. Abnormal phenomena of lunar dust transport near a light/dark junction region on the lunar surface. Journal of Tsinghua University(Science and Technology), 2023, 63(3): 433-448.
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