INFLUENCE OF THE MAGNETIC FIELD OF THE CONDUCTOR ON THE METAL CURRENT AT THE WIRE END FACE IN THE ARC DISCHARGE

A. V. Yershov, E. A. Zelenina

Abstract


The influence of the intrinsic magnetic field of current-carrying wire, the anode and the magnetic field of an electric arc to the viscous flow of the liquid metal at the end of the wire was considered. It is shown that when the direction of the current at the end of the wire-anode changes the asymmetry of magnetic field distribution arises, that leads to an acceleration of the liquid metal flow. By using the equations of magneto-hydrodynamics the additional stress caused by viscous friction of unbalanced electromagnetic forces was found. It is shown that the shear stress in the flow of molten metal was formed under the joint action of the electromagnetic and gas dynamic forces. It was determined that the film thickness in the flow of molten metal only under the influence of the electromagnetic force is lower than the influence of the gas dynamic forces. The conclusion shows that under the above conditions, the influence of the electromagnetic forces on the film thickness of the liquid metal is significantly superior to gas-dynamic friction.

Keywords


discharge plasma; magnetic pressure; shear stress; velocity gradient; tension and the magnetic field

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DOI: https://doi.org/10.15588/1607-6761-2013-2-8

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Copyright (c) 2017 A. V. Yershov, E. A. Zelenina

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