抄録
Numerical calculations were made on a nonequilibrium plasma and a MHD flow in a disk MHD generator with high MHD interactions. Main objective of the present study is to develop a numerical simulation model which can predict performance of a closed cycle disk MHD generator. The basic equations were quasi one-dimensional equations which govern the behavior of both the nonequilibrium two-temperature plasma and the MHD flow. TVD MacCormack method was first applied for the present system. The steady and stable solutions under wide operating conditions of the generator were obtained owing to the high resolution and stable TVD scheme. The distributions of several physical quantities and the basic performances were predicted and agreed well with our experimental data. A shock wave was induced in the nozzle where an ionization proceeded rapidly. As a result, the stagnation pressure loss reached 45_??_55% at the inlet of the MHD channel. Furthermore, the large stagnation pressure loss at the exit of the MIND channel which was observed in the experiment was predicted in the present calculation.
