An Improved Local Thermal Equilibrium Model of DC Arc Plasma Torch

被引：27

作者：

Huang, Renzhong ^{[1
,2
]}

Fukanuma, Hirotaka ^{[1
]}

Uesugi, Yoshihiko ^{[2
]}

Tanaka, Yasunori ^{[2
]}

机构：

[1] Plasma Giken Co Ltd, Tokyo 1710021, Japan

[2] Kanazawa Univ, Kanazawa, Ishikawa 9201192, Japan

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2011年 / 39卷 / 10期

关键词：

Local thermal equilibrium; plasma spraying; plasma torch; 3-D modeling; SPRAY TORCH; FLUCTUATIONS; ARGON;

D O I：

10.1109/TPS.2011.2163828

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Most of the simulation models about arc plasma are based on the hypothesis of local thermal equilibrium (LTE). The nonequilibrium model is very complicated due to the calculation of electron temperature. In this paper, an improved LTE model is developed and applied to the 3-D simulation of the flow patterns inside a nontransferred dc arc plasma torch. Numerical calculations on the distributions of gas temperature and velocity in the plasma torch were carried out using argon as the plasma gas. The electric current density and potential are also discussed. The results indicate that the temperature and velocity distributions of the arc are almost axisymmetrical. The results of voltage drop agree well with the experimental observations. It seems that anode erosion is located on the internal surface of the anode, where the largest number of electrons is injected.

引用

页码：1974 / 1982

页数：9

共 30 条

[1]

Baudry C, 2004, Thermal Spray 2004: Advances in Technology and Application, Proceedings, P717

[2]

Benilov M. S., 2008, J PHYS D, V41

[3]

Boulos M. I., 1994, THERMAL PLASMAS FUND, DOI [10.1007/978-3-319-12183-3_1-2, DOI 10.1007/978-3-319-12183-3_1-2]

[4] Thermodynamic and transport properties in non-equilibrium argon, oxygen and nitrogen thermal plasmas [J].

Colombo, V. ;

Ghedini, E. ;

Sanibondi, P. .

PROGRESS IN NUCLEAR ENERGY, 2008, 50 (08) :921-933

[5]

Coudert JF, 1996, PLASMA CHEM PLASMA P, V16, pS211, DOI 10.1007/BF01512636

[6] Arc instabilities in a plasma spray torch [J].

Duan, Z ;

Heberlein, J .

JOURNAL OF THERMAL SPRAY TECHNOLOGY, 2002, 11 (01) :44-51

[7] Understanding plasma spraying [J].

Fauchais, P .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2004, 37 (09) :R86-R108

[8] Particle Temperature Fluctuations in Plasma Spraying [J].

Goutier, S. ;

Nogues-Delbos, E. ;

Vardelle, M. ;

Fauchais, P. .

JOURNAL OF THERMAL SPRAY TECHNOLOGY, 2008, 17 (5-6) :895-901

[9]

Han P., 1997, P 13 INT S PLASM CHE, P338

[10]

Klinger L., 763 LRP

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