Numerical analysis for magnetically dispersed ar arc plasma at atmospheric pressure with different shape of cathode

Summary form only given. An investigation has been made of the various plasma configurations that occur in the coaxial magnetically dispersed arc plasma generator caused by cathode ablation. Two dimensional calculations have been made of different cathode wedge slope which are 30°, 45°, 60°, 90° respectively. In addition calculations have been made of the current density distribution on the cathode surface with one dimension al electrode sheath model¹. The electron transportation at the cathode sheath is simplified by an effect electric conductivity. The calculations indicate that with the wedge slope decrease the plasma move upstream, the plasma bulk expands downstream, with the aggravation of the plasma movement, the plasma voltage decrease. The current distributions on the cathode surface vary greatly, and the anode current root extends and moves downstream. The cathode temperature increase and the temperature gradient decrease.