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Simulating Nonequlibrium Flow for Ablative Earth Reentry

机译:模拟烧蚀性地球再入的非平衡流

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摘要

The present study of kinetic models for hypersonic nonequilibrium flow attempts to better understand thenvibrational relaxation by comparing Park’s model and the preferential dissociation formulations of Treanor–nMarrone. A simplified approximation for conductive–convective heat transfer computation on the Stardust capsulenhas also been implemented by recognizing that the electron excitation rarely populates beyond first quantum levelnabove ground state. In addition, the partially ionized gas is in a global neutrality condition; as a consequence, thenelectrostatic force and work done by charged particles is negligible in the absence of an externally appliednelectromagnetic field. Therefore, it may be of a limited value for solving the electronic energy conservative equationnfor conductive and convective heat transfer.Numerical simulations by suppressing this equation in the present effortnhave supported this observation. Finally, a spectral group approach for analyzing nonequilibrium radiation heatntransfer is also presented to complete the description of hypersonic nonequilibrium flow.
机译:目前对高超声速非平衡流动力学模型的研究试图通过比较Park模型和Treanor–nMarrone的优先解离公式来更好地理解振动松弛。通过认识到电子激发很少出现在高于基态的第一量子能级之上,还可以对星尘小囊上的传导-对流传热计算进行简化。另外,部分电离的气体处于整体中性状态。结果,在没有外部施加的电磁场的情况下,静电力和带电粒子所做的功可以忽略不计。因此,它对于求解传导和对流传热的电子能量保守方程式可能具有有限的价值。在本研究中,通过抑制该方程式的数值模拟已经支持了这一观点。最后,还提出了一种用于分析非平衡辐射传热的频谱组方法,以完成对超音速非平衡流的描述。

著录项

  • 来源
    《Journal of Spacecraft and Rockets》 |2010年第5期|p.806-815|共10页
  • 作者

    J. S. Shang; S. T. Surzhikov;

  • 作者单位

    J. S. Shang∗Wright State University, Dayton, Ohio 45435andS. T. Surzhikov†Russian Academy of Sciences, 119526, Moscow, Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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