Analysis of End Effects in Diagonal Type MHD Generator by Means of Equivalent Circuit

Abstract

In this paper, there are analyzed current and potential distributions in the end region of a large scale combustion gas diagonal MHD generator by means of a new equivalent circuit. It is ascertained that the calculation results by the equivalent circuit method agree well with the results by the conventional finite difference method. It is made clear that in numerical analysis of the current and potential distributions, the nozzle or the diffuser, which is connected with the generator duct inlet or exit, respectively, must be taken at least to the extent of the duct hight. Next, this paper discusses in detail the influences of the applied magnetic flux distribution, the load current, and the output electrode number etc. on the current concentration which occurs at the ends of the output electrodes.