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Arc plasma jets of a nontransferred plasma torch

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2 Author(s)
Kang, Kyoung Doo ; Dept. of Nucl. Eng., Seoul Nat. Univ., South Korea ; Sang Hee Hong

The plasma flow of a nontransferred plasma torch used for thermal plasma processings is produced by the arc-gas interactions between a cathode tip and an anode nozzle and expands as a jet through the nozzle. In this work, numerically calculated images of the are plasma characteristics are found over the entire plasma region, including both an arc-gas interacting region inside the torch and a jet expanding region outside the torch. A numerical model used assumes a local thermodynamic equilibrium (LTE) with near-electrode phenomena and compressible flow effects. The computational system is described by a two-dimensional (2-D) axisymmetric model which is solved for plasma temperature and velocity by a control volume approach with the modified SIMPLER algorithm in a real torch geometry

Published in:

Plasma Science, IEEE Transactions on  (Volume:24 ,  Issue: 1 )