One-Dimensional Theory Based on a Two-Fluid Nonequilibrium Plasma Model in MPD Thrusters.

A numerical analysis for a modeled plasma flow in an MPD thruster has been done, including nonequilibrium ionization/recombination processes of the propellant gas. According to the existing studies on MPD thrusters, current density distribution in a discharge chamber is strongly influenced by the nonequilibrium ionization processes. In order to determine the ionization fraction at the inlet of chamber, backstream of plasma from the arc region is taken into account. In this study, the flowfield based on this nonequilibrium and two-fluid model is theoretically analyzed.