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

Impact factor: 0.058

ISSN Print: 1093-3611
ISSN Online: 1940-4360

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

DOI: 10.1615/HighTempMatProc.v9.i1.10
pages 1-15

NUMERICAL MODELING OF A DC NON-TRANSFERRED PLASMA TORCH: MOVEMENT OF THE ARC ANODE ATTACHMENT AND RESULTING ANODE EROSION

C. Baudry
Laboratoire Sciences des Procedes Ceramiques et Traitements de Surface ENSIL, 16 rue d'Atlantis, 87068 Limoges, France
Armelle Vardelle
ENSIL, ESTER Technopole, 87068 Limoges - France
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
M. Abbaoui
Laboratoire Arc Electrique et Plasmas Thermiques, Université Blaise Pascal, CNRS UMR 6069, 24 avenue des Landais, F63177 Aubiére Cedex, France
A. Lefort
Laboratoire Arc Electrique et Plasmas Thermiques, Université Blaise Pascal, CNRS UMR 6069, 24 avenue des Landais, F63177 Aubiére Cedex, France

ABSTRACT

This paper describes a 3-D transient modeling of a DC plasma spray torch. The model of the arc column and its attachment on the anode wall is based on the simultaneous solutions of the conservation equations of mass, momentum, energy and the electromagnetism equations. It makes it possible to predict the motion of the anode attachment root on the anode surface as well as the heat load input to the anode surface at the spot location. The heat flux to anode is afterwards used as an input data for a 1-D enthalpy formulation model of anode heating that predicts the time-evolution of the thickness of the liquid layer on the surface at the anode spot and the quantity of vaporized material.