Two-Dimensional Analysis of Effects of Induced Magnetic Field on Generator Performance of a Large-Scale Pulsed MHD Generator

Three-dimensional computation of magnetohydrodynamics in a weakly ionized plasma with strong MHD interaction

“…It should be noticed that Fig. 3 also shows that a large pressure gradient almost in parallel to the y-axis exists at about x = 1.0, 2.8 and 4.2 m, which were not obtained with the past two-dimensional analysis [3]. illustrates a distribution of the static pressure on the x-z plane (y = 0), where it can be clearly shown that strong oblique shock waves are generated at the connection between the nozzle and the insulating walls, traveling down to the channel exit.…”

“…This is because the expansion angle of the walls is suddenly changed at the connection and the Lorentz force starts to work strongly at the edges of electrodes, resulting in the compression of the gas. The oblique shock waves induced at the connection between the nozzle and the electrode walls were also seen in the past two-dimensional analysis [3]. It should be noticed that Fig.…”

“…Fig. 5 depicts the distribution of the electric conductivity along the x-axis, where the solid line represents the result of the present three-dimensional analysis while the dashed line shows the distribution in the past two-dimensional analysis [3]. Fig.…”

“…(10) is discretized by using the Galerkin finite element method with first-order triangle elements. The obtained linear equation is solved with the Gauss elimination method [3]. Fig.…”

“…Numerical analyses of the pulsed MHD generator "Sakhalin" are very important to understand the magnetohydrodynamic behavior under the strong MHD interaction. In order to examine the magnetohydrodynamic behavior of the generator "Sakhalin", the authors have conducted oneand two-dimensional numerical analyses with an assumption of mono-and two-phase flow [2][3][4]. The analyses have suggested that the large Hall electric current is induced in the MHD channel and that the Hall current causes a pseudo-shock wave with large boundary-layer separation [3].…”