| Three—dimensional modelling of the flow and heat transfer in a laminar non—transferred arc plasma torch |
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| 引用本文： | 李和平,陈熙.Three—dimensional modelling of the flow and heat transfer in a laminar non—transferred arc plasma torch[J].中国物理 B,2002,11(1):44-49. |
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| 作者姓名： | 李和平 陈熙 |
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| 作者单位： | Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China |
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| 基金项目： | 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) nontransferred 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 are 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.
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| 关 键 词： | 等离子体火炬 热传导 三维模型化 |
| 收稿时间： | 2001-06-17 |
Three-dimensional modelling of the flow and heat transfer in a laminar non-transferred arc plasma torch |
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| Li He-Ping and Chen Xi.Three-dimensional modelling of the flow and heat transfer in a laminar non-transferred arc plasma torch[J].Chinese Physics B,2002,11(1):44-49. |
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| Authors: | Li He-Ping and Chen Xi |
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| Institution: | Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China |
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| 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. |
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| Keywords: | plasma torch non-transferred arc 3D modelling |
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