Title :
An effect of magnetic field on arc plasma flow
Author :
Kotalík, Pavel ; Nishiyama, Hideya
Author_Institution :
Inst. of Plasma Phys., Acad. of Sci. of the Czech Republic, Prague, Czech Republic
fDate :
2/1/2002 12:00:00 AM
Abstract :
MM equations for electric arcs predict recirculation zones in front of electrodes of plasma torches that are consumed faster as a result. The same equations suggest that a weak applied uniform dc magnetic field parallel to the presumably axisymmetric plasma flow can remove the reverse flows, and thus protect the electrodes. As an example, results from a model for a water-stabilized plasma torch and its near-cathode region are presented. At an arc current of 400 A, an applied magnetic field of -0.06 T completely removes the recirculation zone
Keywords :
arcs (electric); magnetic field effects; plasma flow; plasma magnetohydrodynamics; plasma torches; 0.06 T; 400 A; MHD equations; arc current; arc plasma flow; axisymmetric plasma flow; electric arcs; electrodes; magnetic field; near-cathode region; plasma torches; recirculation zone; recirculation zones; reverse flows; uniform DC magnetic field; Atmospheric-pressure plasmas; Cathodes; Current density; Electrodes; Equations; Magnetic fields; Magnetohydrodynamics; Plasma density; Plasma temperature; Protection;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2002.1003973
