宇航学报

宇航学报 ›› 2016, Vol. 37 ›› Issue (10): 1193-1199.doi: 10.3873/j.issn.1000-1328.2016.10.006

• 飞行器设计与力学 • 上一篇    下一篇

化学模型对数值模拟等离子体流动的影响研究

高铁锁，董维中，江涛，丁明松，刘庆宗   

  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
  • 收稿日期:2016-01-21 修回日期:2016-05-12 出版日期:2016-10-15 发布日期:2016-10-25
  • 基金资助:

    国家自然科学基金（91216204）

Research on Effects of Chemical Models on Numerical Simulation of Plasma Flow

GAO Tie suo, DONG Wei zhong, JIANG Tao, DING Ming song, LIU Qing zong   

  1. Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China
  • Received:2016-01-21 Revised:2016-05-12 Online:2016-10-15 Published:2016-10-25

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摘要：

针对典型再入飞行试验条件，基于求解化学非平衡N-S方程的数值方法，对再入体非平衡等离子体绕流进行数值模拟，比较分析了两种典型化学模型对电子数密度数值模拟结果的影响。研究发现，7组分化学模型的电子数密度模拟结果具有较好的一致性，而11组分化学模型的数值模拟结果则存在较大差异，产生差异的主要机制在于不同模型中氧原子的电离效应，总体上Park模型的数值模拟结果与飞行测量结果具有较好的一致性。

关键词: 化学模型, 等离子体流动, 电子数密度, 数值模拟

Abstract:

The plasma flows over a reentry body in typical flight experiment condition are numerically simulated by solving the Navier-Stokes equations with chemical source terms, and the effects of different chemical models on the electron number densities in plasma flow are analyzed. The research shows that the electron number densities computed by the different 7-species chemical models are consistent, but the electron number densities computed by the different 11-species chemical models have obvious differences due to the ionized effects of the oxygen atom in different models. Generally the electron number densities computed by the Park model are in better agreement with the flight experiment data.

Key words: Chemical model, Plasma flow, Electron number densities, Numerical simulation

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