Performance evaluation of disk MHD accelerator with nozzle and diffuser

The channel shape of disk MHD accelerator is so unique for the propulsion system, and it has some advantages for the acceleration. This work is to evaluate the performance of disk MHD accelerator with nozzle and diffuser. Q1D program is used as an analysis program. As results, radial gas velocity is increased up to 3,100 (m/s) at the middle of diffuser. In addition the velocity is suddenly decreased, and gas pressure gained at the close to channel inlet at the same time. This phenomenon is called as MHD compression whose reason was the interaction of Lorenz force, in particularly much Hall current density is done. And the work of diffuser could show the recovering of the gas pressure about 0.01(MPa) from the back side to the exit of the diffuser. Therefore electrical conductivity in the diffuser was increased.