Numerical studies of the MHD generator cross section on the optimized electrical power output

Abstract

This paper describes the results of a numerical analysis of the optimal electrodynamical performance of an MHD generator. The optimal magnetic field configuration and optimal MHD channel cross section were determined simultaneously to obtain the maximum enthalpy extraction. Supposing a Faraday type equilibrium plasma MHD generator with 5 MW thermal input, it was shown that the optimal aspect ratio is about 3 to 4 and the optimized magnetic field over the cross section should be nonuniform with a strengthened field in the central region of the channel and a weakened distribution near the electrode region.