3D static and time-dependent modelling of a dc transferred arc twin torch system - Archive ouverte HAL Access content directly
Journal Articles Journal of Physics D: Applied Physics Year : 2011

3D static and time-dependent modelling of a dc transferred arc twin torch system

(1) , (1) , (1) , (1) , (1)
1

Abstract

The transferred arc plasma torch device consists of two electrodes generating a plasma arc sustained by means of an electric current flowing through the body of the discharge. Modeling works investigating of transferred electric arc discharges generated between two suspended metallic electrodes, in the so called twin torch configuration, are scarce. The discharge generated by this particular plasma source configuration is characterized by a complex shape and fluid dynamics and needs a 3D description in order to be realistically predicted. The extended discharge length that goes from the tungsten pencil cathode to the flat copper anode without any particular confinement wall and the fluid dynamics and magnetic forces acting on the arc may induce an unsteady behavior. In order to capture the dynamic behavior of a twin torch discharge, a 3D time dependent plasma arc model has been developed using a customized commercial code FLUENT form in both Local Thermodynamic Equilibrium (LTE) and non-LTE. A two temperature (2T) model has been developed taking into account only the thermal non-equilibrium effects in argon plasma. The main differences between LTE and 2T models results concern the increased extension of the horizontal section of the discharge and the predicted reduced (of about 60-80V) voltage drop between the electrodes when using a 2T model.

Keywords

Fichier principal
Vignette du fichier
PEER_stage2_10.1088%2F0022-3727%2F44%2F19%2F194005.pdf (3.03 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-00615137 , version 1 (18-08-2011)

Identifiers

Cite

V Colombo, E Ghedini, M Boselli, P Sanibondi, A Concetti. 3D static and time-dependent modelling of a dc transferred arc twin torch system. Journal of Physics D: Applied Physics, 2011, 44 (19), pp.194005. ⟨10.1088/0022-3727/44/19/194005⟩. ⟨hal-00615137⟩

Collections

PEER
36 View
345 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More