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Simulating Nonequilibrium Flow for Ablative Earth Reentry

机译:模拟非平衡流用于烧蚀性地球再进入

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摘要

The present study of kinetic models for hypersonic nonequilibrium flow attempts to better understand the vibrational relaxation by comparing Park's model and the preferential dissociation formulations of Treanor-Marrone. A simplified approximation for conductive-convective heat transfer computation on the Stardust capsule has also been implemented by recognizing that the electron excitation rarely populates beyond first quantum level above ground state. In addition, the partially ionized gas is in a global neutrality condition; as a consequence, the electrostatic force and work done by charged particles is negligible in the absence of an externally applied electromagnetic field. Therefore, it may be of a limited value for solving the electronic energy conservative equation for conductive and convective heat transfer. Numerical simulations by suppressing this equation in the present effort have supported this observation. Finally, a spectral group approach for analyzing nonequilibrium radiation heat transfer 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-Marrone的优先解离公式来更好地理解振动弛豫。通过认识到电子激发很少出现超过基态以上的第一量子能级,已经实现了星尘胶囊上传导对流传热计算的简化近似。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,它对于求解用于传导和对流传热的电子能量保守方程可能具有有限的价值。在目前的研究中,通过抑制该方程的数值模拟已经支持了这一观察。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。

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