Numerical simulation study on fluid dynamics of plasma window using argon
Numerical simulation study on fluid dynamics of plasma window using argon
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DOI：
10.1063/1.4813249
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发表时间：
2013-07
影响因子：
2.2
通讯作者：
S. Huang;K. Zhu;B. Shi;Y. Lu;A. Hershcovitch;L. Yang;X. Y. Zhang;G. Wei
中科院分区：
文献类型：
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作者：
S. Huang;K. Zhu;B. Shi;Y. Lu;A. Hershcovitch;L. Yang;X. Y. Zhang;G. Wei
本文建立了基于fluent的二维磁流体动力学数值模型，研究了无窗真空密封装置等离子体窗的弧场和流场。进气口、电弧形成段和等离子体膨胀段都集成在一个整体模型中。模型采用轴对称阴极结构（空心阴极）。给出并讨论了电弧的电流分布。用温度场、速度场和压力场来说明等离子体窗内高压间隙的物理机制。认为流动加速和粘度效应是造成压降的主要原因。计算结果与解析模型吻合较好。验证了等离子体窗的密封能力。
In this paper, a numerical 2D FLUENT-based magneto-hydrodynamic model has been developed to investigate the arc and flow field of plasma window, which is used as a windowless vacuum sealing device. The gas inlet, arc creation-developing and plasma expansion segments are all incorporated together in the integral model. An axis-symmetry cathode structure (hollow cathode) is used in the model. Current distribution of the arc is presented and discussed. The temperature, velocity, and pressure field are presented to show the physical mechanisms for the high pressure gap within the plasma window. Flow acceleration and viscosity effect are concluded as the main reasons for the pressure drop. The result for the pressure distribution in the cylindrical tube section has a good agreement with the analytical model. The validation for the sealing ability of plasma window is verified.