中国物理B ›› 2002, Vol. 11 ›› Issue (1): 44-49.doi: 10.1088/1009-1963/11/1/310

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Three-dimensional modelling of the flow and heat transfer in a laminar non-transferred arc plasma torch

李和平, 陈熙   

  1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
  • 收稿日期:2001-06-17 修回日期:2001-09-10 出版日期:2005-06-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 59836220 and 50176024).

Three-dimensional modelling of the flow and heat transfer in a laminar non-transferred arc plasma torch

Li He-Ping (李和平), Chen Xi (陈熙)   

  1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
  • Received:2001-06-17 Revised:2001-09-10 Online:2005-06-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 59836220 and 50176024).

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摘要： By experimental observation we show that the plasma flow and heat transfer within a direct current (DC) non-transferred arc plasma torch always show appreciable three-dimensional (3D) peculiarity even when the geometrical construction of the torch and working gas admission and external electrical collection conditions are completely axisymmetrical. Previous two-dimensional (2D) modelling studies cannot predict the 3D peculiarity of the plasma torch. We have successfully performed 3D modelling, and in this paper we present the modelling results for the plasma flow and heat transfer characteristics in a laminar DC non-transferred arc argon plasma torch. The predicted arc-root location on the surface of the torch anode and arc voltage compare favourably with the corresponding experimental results.

Abstract: By experimental observation we show that the plasma flow and heat transfer within a direct current (DC) non-transferred arc plasma torch always show appreciable three-dimensional (3D) peculiarity even when the geometrical construction of the torch and working gas admission and external electrical collection conditions are completely axisymmetrical. Previous two-dimensional (2D) modelling studies cannot predict the 3D peculiarity of the plasma torch. We have successfully performed 3D modelling, and in this paper we present the modelling results for the plasma flow and heat transfer characteristics in a laminar DC non-transferred arc argon plasma torch. The predicted arc-root location on the surface of the torch anode and arc voltage compare favourably with the corresponding experimental results.

Key words: plasma torch, non-transferred arc, 3D modelling

中图分类号:  (Plasma torches)

  • 52.75.Hn
52.30.-q (Plasma dynamics and flow) 52.65.Kj (Magnetohydrodynamic and fluid equation) 52.80.Mg (Arcs; sparks; lightning; atmospheric electricity)