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首页> 外文期刊>Physics of plasmas >Weakly charged round micro-plasma jet flows into vacuum
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Weakly charged round micro-plasma jet flows into vacuum

机译：弱带圆形微等离子体喷射流入真空

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摘要

This paper presents a model for highly dilute microplasma jet flows expanding into a vacuum from a round exit, with given number density, bulk velocity, temperature, and potential at the exit. The Debye length at the exit is assumed to be large, the quasi-neutral condition is adopted to treat charges, and the potential field is computed with the Boltzmann relation. At farfield, the exit degenerates as a point source, and simplified analytical formulas for the density, velocity, temperatures, potential, and electric field components are obtained. From the crucial centerline properties, exact but more compact solutions are further developed. The treatment is based on the gas kinetic theory, and the results are analytical and generic. The results include rich physics and offer insights into better understanding of many existing models in the literature, for example, the cosine law plume model shall be used with caution. The current results can be widely applicable to estimate the whole flow and potential fields, with reduced simulation and measurement costs. Farfield property estimations can be performed without numerical simulations and measurements. Based on these results from this work, more advanced models may be further developed. Published under license by AIP Publishing.
机译：本文介绍了一种高度稀释的显微射流喷射流入从圆出口的真空中的模型，给定数量密度，散装速度，温度和出口处的电位。假设出口处的脱义长度大，采用准中性条件来处理电荷，并且通过Boltzmann关系计算电位场。在Farfield，获得作为点源的出口退换，并获得密度，速度，温度，电位和电场部件的简化分析公式。从关键的中心线属性，进一步开发了精确但更紧凑的解决方案。治疗基于气体动力学理论，结果是分析和通用的。结果包括丰富的物理，并在文献中更好地了解许多现有模型的洞察力，例如，余弦法羽流模型应谨慎使用。目前的结果可以广泛适用于估计整个流动和潜在领域，仿真和测量成本降低。可以在没有数值模拟和测量的情况下执行Farfield属性估计。基于这项工作的这些结果，可以进一步开发更先进的模型。通过AIP发布在许可证下发布。

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  • 来源
    《Physics of plasmas》 |2019年第5期|共11页
  • 作者

    Cai S.; Cai C.; Li J.;

  • 作者单位

    Michigan Technol Univ Dept Mech Engn &

    Engn Mech Houghton MI 49903 USA;

    Michigan Technol Univ Dept Mech Engn &

    Engn Mech Houghton MI 49903 USA;

    King Fahd Univ Petr &

    Minerals Coll Petr Engn &

    Geosci Ctr Integrat Petr Res Dhahran 31261 Saudi Arabia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 等离子体物理学;
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