ファラデー型 MHD 発電チャネル内の流動特性に関する数値解析

Abstract

Numerical analysis has been carried out to explain and predict the choking phenomena and the occurence of a shock wave in subsonic and supersonic Faraday type MHD generators, using a quasi-one-dimensional theory. This study is intended to provide one of data bases for a large-scale MHD generator. The steady one-dimensional conservation equations, coupled with the Ampere's law and the generalized Ohm's law, are solved. It has been shown that, in the case of a divergent channel and that a loading factor is constant, the limiting length of channel for choking decreases with an increase in an interaction parameter. A shock wave appears in a divergent channel for a certain range of the interaction parameter. The minimum value increases with an increase in the loading factor and with a decrease in the friction coefficient, but it is almost independent of the inlet Mach number of the channel. On the other hand, the maximum value increases with increases in the loading factor and in the inlet Mach number, but it is almost independent of the friction coefficient.