抄録
Structures of plasma and fluid flow in a nonequilibrium disk MHD generator with inlet swirl have been examined with three dimensional numerical simulations, which will comprehend one and two dimensional simulations. It is confirmed that the inlet swirl reduces the Faraday current density and the steep increase in static pressure near the inlet region of generator channel, which arise in a radial flow generator without inlet swirl under the same operating conditions. The optimum load resistance giving the highest enthalpy extraction ratio shifts to the high value owing to inlet swirl, while structures of plasma and fluid flow are almost the same as those in a radial flow generator except for azumithal velocity. It is found for a low load resistance that nonuniform and unsteady plasma structure with low and high electron temperature regions appears in the r-θ plane, in contrast to streamer structure which appears without inlet swirl.
