Zum betriebsverhalten des wanderfeld-mhd-wandlers mit berückischtigung der randströmung

Abstract

Due to friction, the fluid near the channel wall of electrodeless MHD generators moves more slowly than in the middle of the channel. Thus, additional losses are caused in the fluid. Under simplified conditions (as trapezium-shaped fluid velocity, no current displacement and partly neglected leakage coefficient) these losses were ascertained. Especially with small channel heights having a relatively thick boundary layer, and with small slips losses can amount to much more than those calculated for constant velocity in the whole channel.

In order to get a realistic performance calculation the thickness of the layer has to well estimated. The thickness results out of the balance between the frictional resistance and the electromagnetic force.