Abstract
Starting from a parallel jet concept the linearized magnetogasdynamic equations are solved for a supersonic free plasma jet with an axial current. The solution is given in terms of the magnetic pressure number. A critical magnetic pressure number depending on the MACH number is derived. Below this value standing periodic pressure waves occur, as in the gasdynamic case. For higher values the pressure distribution is non-periodic. Experiments are performed with a supersonic argon jet. The MACH number is determined by the shock angle at a cone. The pressure distribution in the axis of the jet is measured by a pressure probe. The experimental results are consistent with the theoretical predictions.
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