Abstract:
In this paper, the design of a magnetohydrodynamic (MHD) generator is numerically simulated and analyzed. The regime and overall parameters of the accelerating nozzle and MHD channel of the pulsed MHD generator with a two-chamber plasma generator, operating on pyrotechnic fuel combustion products with afterburning in atmospheric oxygen, are numerically calculated. A mixture of Mg powders (fuel) and KNO$_3$ saltpeter is chosen as the pyrotechnic fuel. This mixture serves as both an oxidizing agent and a source of an easily ionizing additive. The condensed fraction includes MgO particles that can be solid or liquid depending on the ambient conditions. Relying on the previously calculated parameters of the constructed plasma generator, the developed mathematical model allows the numerical investigation of all the processes occurring in the gas-dynamic duct of the MHD generator. The parameters of a two-phase flow in the MHD channel and its general characteristics can be determined for the given characteristics of the nozzle.
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