Rarefied ionization analysis for lunar exploration type capsule

FANG Ming; LI Danyang; XU Kun

doi:10.7638/kqdlxxb-2017.0206

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Rarefied ionization analysis for lunar exploration type capsule

更新时间：2026-05-28

- Rarefied ionization analysis for lunar exploration type capsule
- Vol. 37, Issue 6, Pages: 924-930(2019)
- 作者机构：
  
  1. 中国空气动力研究与发展中心超高速空气动力究所,四川,绵阳,621000
  2. 北京航空航天大学国家计算流体力学实验室,北京,100191
  3. 北京大学物理学院,北京,100871
  4. 香港科技大学数学系,香港
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2017.0206
  CLC： V412.4+4;O646.7
- Published：2019
- 稿件说明：
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方明, 李丹杨, 徐昆. 类探月返回试验器稀薄气体电离特性分析[J]. 空气动力学学报, 2019, 37(6): 924-930.

FANG Ming, LI Danyang, XU Kun. Rarefied ionization analysis for lunar exploration type capsule[J]. 2019, 37(6): 924-930.
方明, 李丹杨, 徐昆. 类探月返回试验器稀薄气体电离特性分析[J]. 空气动力学学报, 2019, 37(6): 924-930. DOI： 10.7638/kqdlxxb-2017.0206.

FANG Ming, LI Danyang, XU Kun. Rarefied ionization analysis for lunar exploration type capsule[J]. 2019, 37(6): 924-930. DOI： 10.7638/kqdlxxb-2017.0206.

摘要

探月返回试验器以接近第二宇宙速度再入，绕流气体将发生较为严重的化学反应和电离，传统上发生在连续流区的通信黑障大幅向稀薄区域延伸。本文基于自主开发的稀有组分权重因子方法的DSMC计算平台，采用公开的外形和与探月返回试验器相似的飞行条件，针对第一次再入、第一次跳出和第二次再入的稀薄流域，重点考察类探月返回试验器的稀薄气体电离特性。通过电子数密度预测通信中断发生高度，其结果与飞行试验观测值具有良好的一致性，误差在2 km以内。计算结果还表明，与RAM-C Ⅱ等细长体的联合电离不同，对于类探月返回试验器的大钝头体再入，主要电离来源是N、O与中性分子或原子碰撞导致的直接电离。

Abstract

As the lunar exploration capsule reentries with the second cosmic speed

serious chemical reactions and ionization occur in the surrounding atmosphere

and the communication blackout traditionally happened in continuum flows extends widely to the rarefied regime. Based on our own developed DSMC computation platform based on weighting factor scheme for trace species

the rarefied air ionization of lunar exploration type capsule is investigated

including the first reentry

first jump-out as well as second reentry processes in rarefied flow regimes

with an open configuration and simulation flying conditions. The communication blackout starting altitudes are predicted due to the electron number density

and the results behave excellent agreement with the flight observations

with errors smaller than 2 km. The results also reveal that

different from the associative ionization for slender body such as RAM-C Ⅱ

the main ionization source of the reentry for large blunt body like the lunar exploration type capsule is the direct ionization due to the collision between N

O and neutral molecules or atoms.

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Keywords

references

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