Flow Characteristics of DC Plasma Torch Controlled by Magnetic Field

Abstract:

A magneto-hydrodynamic(MHD) model of magnetic controlled DC plasma torch is presented. The model includes the Navier-Stokes and the energy equations modified by the addition of some source terms, which reflect the Lorentz force due to the self-induced and the external magnetic fields, the radiative cooling and the Joule heating. In addition, the generalized Ohm's law, and the Maxwell's equations are also modeled. The MHD model is solved with the software FLUENT . The distribution of the velocity in the torch is obtained. The results show that the larger the current size of external current-carrying solenoid coil is , the greater the radial velocity and swirl velocity in the torch outlet are.

• Periodical: Applied Mechanics and Materials (Volumes 268-270)
• Pages: 610-613
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.268-270.610
• Online since: December 2012
• Authors: Jian Ping Wei, Da Pei Tang
• Keywords: External Magnetic Field, Flow Characteristic, MHD, Plasma Torch

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