中国物理B ›› 2008, Vol. 17 ›› Issue (2): 649-654.doi: 10.1088/1674-1056/17/2/048

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

Effect of an axial magnetic field on a DC argon arc

黎林村, 夏维东   

  1. Department of Thermal Science & Energy Engineering, University of Science & Technology of China, Hefei 230027, China
  • 收稿日期:2007-03-21 修回日期:2007-04-19 出版日期:2008-02-20 发布日期:2008-02-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10375065 and 10675122).

Effect of an axial magnetic field on a DC argon arc

Li Lin-Cun(黎林村) and Xia Wei-Dong (夏维东)†   

  1. Department of Thermal Science & Energy Engineering, University of Science & Technology of China, Hefei 230027, China
  • Received:2007-03-21 Revised:2007-04-19 Online:2008-02-20 Published:2008-02-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10375065 and 10675122).

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摘要： In this paper a commercial CFD (computational fluid dynamics) code FLUENT has been used and modified for the axisymmetric swirl and time-dependent simulation of an atmospheric pressure argon arc in an external axial magnetic field (AMF). The computational domain includes the arc itself and the anodic region. Numerical results demonstrate that the AMF substantially increases the tangential component of the plasma velocity. The resulting centrifugal force for the plasma rotation impels it to travel to the arc mantel and as a result, a low-pressure region appears at the arc core. With the AMF, the arc presents a hollow bell shape and correspondingly, the maximal values of the temperature, pressure and current density on the anode surface are departing from the arc centreline.

Abstract: In this paper a commercial CFD (computational fluid dynamics) code FLUENT has been used and modified for the axisymmetric swirl and time-dependent simulation of an atmospheric pressure argon arc in an external axial magnetic field (AMF). The computational domain includes the arc itself and the anodic region. Numerical results demonstrate that the AMF substantially increases the tangential component of the plasma velocity. The resulting centrifugal force for the plasma rotation impels it to travel to the arc mantel and as a result, a low-pressure region appears at the arc core. With the AMF, the arc presents a hollow bell shape and correspondingly, the maximal values of the temperature, pressure and current density on the anode surface are departing from the arc centreline.

Key words: arc modeling, axial magnetic field, FLUENT

中图分类号:  (Arcs; sparks; lightning; atmospheric electricity)

  • 52.80.Mg
52.30.-q (Plasma dynamics and flow) 52.65.-y (Plasma simulation)