Abstract
Phenomena of interelectrode breakdown in a supersonic Faraday type MHD generator are studied through time-dependent two-dimensional numerical analyses. Whole area of a single electrode-pair is analyzed. (1) No inter-electrode breakdown is induced, when the channel is operated under the design condition with the averaged y-component of current density of 0.96 A/cm 2 and of the Hall field of −30.4 V/cm. (2) The intercathode breakdown alone is induced, whereas no breakdown occurs at the anode under the condition of the averaged y-component of current density of 1.91 A/cm 2 and of the Hall field of −60.7 V/cm. (3) Boundary layer separation is induced by the strong axial current between adjacent cathodes.
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More From: Elsevier Studies in Applied Electromagnetics in Materials
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