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Stable Configuration of Electric Arcs in Transverse Magnetic Fields

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1 Author(s)
Schrade, H.O. ; Aerospace Research Laboratories Wright Patterson Air Force Base, Ohio

Deviations from rotational symmetry of arc columns exposed to transverse magnetic fields cause convection and a momentum transport between the column and its surrounding gas. As a consequence, the arc moves and changes its geometry until it reaches a stable configuration. Based on the momentum transport equation, the arc behavior is discussed under various operating conditions, and stable arc configurations are determined. In particular, the stability-criteria of a balanced arc column in a transverse gas flow and magnetic field is derived. It turns out that the arc becomes unstable with respect to kinks parallel to the applied magnetic field when ß = p¿/(B2/8¿)¿1. (p¿ = ambient pressure, Bo = applied magnetic field).

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Plasma Science, IEEE Transactions on  (Volume:1 ,  Issue: 3 )