航空学报 > 2020, Vol. 41 Issue (7): 123240-123240   doi: 10.7527/S1000-6893.2020.23240

DSMC量子动理学模型在火星再入流动中的应用

李锦1, 耿湘人1, 陈坚强1, 江定武1, 李红喆2   

  1. 1. 中国空气动力研究与发展中心 计算空气动力研究所, 绵阳 621000;
    2. 中国空气动力研究与发展中心 设备设计及测试技术研究所, 绵阳 621000
  • 收稿日期:2019-06-24 修回日期:2020-02-25 出版日期:2020-07-15 发布日期:2020-03-13
  • 通讯作者: 李锦 E-mail:lijin6964893@163.com
  • 基金资助:
    国家数值风洞项目

Application of DSMC quantum kinetic model in re-entry flow of Mars

LI Jin1, GENG Xiangren1, CHEN Jianqiang1, JIANG Dingwu1, LI Hongzhe2   

  1. 1. Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;
    2. Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China
  • Received:2019-06-24 Revised:2020-02-25 Online:2020-07-15 Published:2020-03-13
  • Supported by:
    National Numerical Wind Tunnel Project

摘要: 为解决化学反应模型高温数据缺乏的难题,探索DSMC方法量子动理学(QK)模型在实际中的应用,本文将该模型进一步应用于火星探测器稀薄气动特性的数值预测。通过计算探路者号在85 km、95 km和110 km高度的稀薄绕流,评估了QK模型的性能和稀薄气体效应的影响规律。结果表明,QK模型不依赖宏观的化学反应速率系数,适用于火星再入流动计算。化学反应及其模型对气动力的影响很小,但对气动热特性的影响不容忽略,考虑化学反应后的驻点热流可以下降约12%~14%。

关键词: DSMC方法, 量子动理学模型, 火星再入, 化学反应, 气动特性

Abstract: To solve the problem of lacking high temperature data in chemical reaction models and explore the application capacity of the Quantum Kinetic (QK) model, this paper further applies this model to the reentry flow of the Mars exploration vehicle for numerical prediction of rarefied aerodynamic characteristics. Via calculation of the flow field of the Pathfinder at the heights of 85 km, 95 km, 110 km, respectively, the performance of the QK model and the influence of the rarefied gas effect are evaluated. Results show that the QK model which relies not on the macroscopic reaction rates is suitable for the Mars reentry flows. The rarefied aerodynamics is not sensitive to the chemical reaction and its model; however, the influence of the chemical reaction on the aerothermodynamics cannot be neglected. The heat flux on the stagnation point can reduce by about 12%-14% after the chemical reaction is considered.

Key words: DSMC method, quantum kinetic model, Mars re-entry, chemical reactions, aerodynamic characteristics

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