Generation of a gas-discharge air plasma in a supersonic magnetohydrodynamic channel |
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Authors: | R. V. Vasil’eva A. V. Erofeev B. G. Zhukov T. A. Lapushkina S. A. Ponyaev S. V. Bobashev |
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Affiliation: | 1.Ioffe Physico-Technical Institute,Russian Academy of Sciences,St. Petersburg,Russia |
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Abstract: | A method for ionizing a supersonic air flow is developed to obtain a flow conductivity sufficient for a magnetohydrodynamic (MHD) interaction and generation of a magnetically induced current in a supersonic nozzle. The efficiencies of several (high-frequency, multiple-pulse high-voltage, and combined) methods for initiating a gas discharge used for ionizing air are compared. The supersonic air flow is ionized by a pulse-periodic high-voltage discharge producing an air plasma with a conductivity of up to 20 S/m. The experimentally obtained magnetically induced current of 0.1 A is smaller than the rated value owing to the Hall effect and the electrode voltage drop. The theoretical possibility of obtaining a magnetically induced current in a supersonic air flow is demonstrated; such currents can subsequently be used for controlling the flow in air inlets of aircraft. |
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