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A new discharge chamber for pulsed arcs of high power (U=1000V, 1-2 . . . 5 kA) burning quasistationary in strong axial gas flows is described. The axial pressure drop of about 25 at in the convergent-divergent nozzle results in a mass flow of ca. 600 g/s. The pulse duration is 5 ms. In front of the nozzle one can produce a very stable arc column under certain conditions. In the divergent flow field the arc generates strong turbulence. The radial temperature distribution in the stable part is measured by schlieren-and emission spectroscopic methods. Due to radiation transport in the arc column proper and radial gas flow in the cool region the temperature profile is almost a rectangular distribution.

Untersuchung quasistationärer Lichtbögen hoher Leistung bei starker axialer Gasströmung / High Power Quasistationary Arcs in Strong Axial Gasflow