Non-equilibrium Modeling of Tungsten-Inert Gas Arcs
Non-equilibrium Modeling of Tungsten-Inert Gas Arcs
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DOI：
10.1007/s11090-017-9785-y
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发表时间：
2017-03-01
影响因子：
3.6
通讯作者：
Baeva, Margarita
中科院分区：
文献类型：
--
作者：
Baeva, Margarita
本文概述了钨极惰性气体电弧等离子体建模的最常见的非平衡方法，这些方法已经发展到目前为止，特别是双温度和完全非平衡方法。第一组意味着热非平衡，但化学平衡，而第二组描述的电弧等离子体避免假设的热和化学平衡。讨论了物理描述的共同特征和具体特征。最新的完全非平衡模型，这是第一次应用到钨-惰性气体电弧布置与截头圆锥形尖端的掺杂钨阴极的结果进行了比较，与以前发表的非平衡模型和实验数据。一般的扩散表示和更准确的边界条件，将邻近电极的空间电荷鞘的属性，使一种新的描述的电弧核心，近电极区域和电弧条纹在一个自洽的方式，并提供了一个更深入的了解电弧特性。
The paper gives an overview of the most common non-equilibrium approaches for modeling of tungsten-inert gas arc plasma, which have been developed up to date, in particular two-temperature and fully non-equilibrium approaches. The first group implies thermal non-equilibrium but chemical equilibrium whereas the second group describes the arc plasma avoiding assumptions of both thermal and chemical equilibrium. The common and specific features of the physical description are discussed. Results of the most recent fully non-equilibrium model, which is applied for the first time to tungsten-inert gas arc arrangement with a truncated conical tip of a doped tungsten cathode, are compared with those of previously published non-equilibrium models and experimental data. The general diffusion representation and more accurate boundary conditions incorporating the properties of the space-charge sheaths adjacent to the electrodes enable a novel description of the arc core, the near-electrode regions and the arc fringes in a self-consistent manner and provides a deeper insight into the arc properties.