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Flow Characteristics of An Atmospheric Pressure Plasma Torch  

Moon, Jang-H. (Center for Advanced Plasma Surface Technology, SungKyunKwan University)
Kim, Youn-J. (Center for Advanced Plasma Surface Technology, SungKyunKwan University)
Han, Jeon-G. (Center for Advanced Plasma Surface Technology, SungKyunKwan University)
Publication Information
Journal of the Korean institute of surface engineering / v.36, no.1, 2003 , pp. 69-73 More about this Journal
Abstract
The atmospheric pressure plasma is regarded as an effective method for surface treatments because it can reduce the period of process and doesn't need expensive vacuum apparatus. The performance of non-transferred plasma torches is significantly depended on jet flow characteristics out of the nozzle. In order to produce the high performance of a torch, the maximum discharge velocity near an annular gap in the torch should be maintained. Also, the compulsory swirl is being produced to gain the shape that can concentrate the plasma at the center of gas flow. In this work, the distribution of gas flow that goes out to atmosphere through a plenum chamber and nozzle is analyzed to evaluate the performance of atmospheric pressure plasma torch which can present the optimum design of the torch. Numerical analysis is carried out with various angles of an inlet flow velocity. Especially, three-dimensional model of the torch is investigated to estimate swirl effect. We also investigate the stabilization of plasma distribution. For analyzing the swirl in the plenum chamber and the flow distribution, FVM (finite volume method) and SIMPLE algorithm are used for solving the governing equations. The standard k-model is used for simulating the turbulence.
Keywords
Non-transferred plasma torch; Cold plasma; Swirl effect; Plasma distribution;
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  • Reference
1 S. P. Kuo., Koretzky, L. Orlick, Design and Electrical Characteristics of a Modular Plasma Torch, , 27 (1999) 752-758   DOI   ScienceOn
2 Spalding, PHEONICS Encyclopedia, article on CFD to SFT, The status and Future of CFD, (1998)
3 K.-D. Kang, S.-H. Hong, Arc Plasma Jets of a Non-transferred Plasma Torch, IEEE Tans. on Plasma Science, 24 (1996) 89-90   DOI   ScienceOn
4 H. K. Versteeg, W. Malalasekera, An Introduction to Computational Fluid Dynamics, Longman, London (1995)
5 N. EI-Kaddah, J. McKelliget, J. Szekely, Heat Transfer and Fluid Flow in Plasma Spraying, Metal. Trans. B, 15B (1984) 59-7
6 S. V. Patankar, Numerical heat transfer and fluid flow, Hemisphere, Washington$\lambda$ D. C. (1980)
7 D.-Y. Kim, L.-Y. Ko, Plasma Metal Eng., Bando, Seoul (1997)
8 G. Yang, D. Causon, R. Saunders, P. Batten, A Cartesian Cut Cell Method for Compressible Flows-part B: moving Body Problems, Aeronautical Journal, 101 (1997) 56-65