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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Imprimir: 1093-3611
ISSN On-line: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v10.i3.40
pages 393-406

NUMERICAL MODELING OF ARC BEHAVIOR IN A DC PLASMA TORCH

C. Chazelas
Laboratoire Sciences des Procédés Céramiques et de Traitements de Surface, ENSIL,16 rue d'Atlantis, 87068 LIMOGES Cedex, France
Eric Moreau
LASEP, Faculte des Sciences, Université d'Orléans, rue Gaston Berger BP 4043, 18028 Bourges Cedex; Department of Fluids, Thermique et Combustion Institut PPRIME (CNRS UPR3346, Universite de Poitiers, ISAE-ENSMA) Bd Marie & Pierre Curie
G. Mariaux
Laboratoire Sciences des Procedes Ceramiques et de Traitements de Surface UMR CNRS 6638 University of Limoges 123 avenue Albert Thomas, 87060 LIMOGES - France
Armelle Vardelle
ENSIL, ESTER Technopole, 87068 Limoges - France

RESUMO

This paper describes a three-dimensional time-dependent model of a direct current plasma torch when the arc operates in the restrike mode. The model is based on the simultaneous solution of the conservation equations of mass, momentum, energy, electric current and electromagnetic equations. It makes it possible to predict the effect of the operating parameters of the plasma torch on the motion of the attachment root on the anode surface and the time-evolution of the gas flow fields inside the nozzle. The simulations, carried out for a conventional plasma spray torch, show that the model gives the good tendencies when a torch parameter is varied, and that the predicted values of gas temperature and velocity at the nozzle exit agree with the experimental values.


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