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Electrical conductivity and characteristic times of ion recombination and plasma residence as a function of electron temperature . A total inflow temperature range from is shown. The static temperature and pressure are estimated under an isentropic expansion condition from a stagnation state (the total pressure is and the Mach number is 1).
(a) Front and (b) cross-sectional views of MHD generator.
Images of plasma structure (upper figures) and variation of argon-atom-line spectrum intensity with time (lower figures): (a) , (b) , and (c) .
(a) Hall voltage -Hall current characteristics obtained in the present experiments. (b) Enthalpy extraction ratio as a function of total inflow temperature . (c) Power output density as a function of modified magnetic flux density defined as the square of the applied magnetic flux density at the MHD channel divided by the total inflow pressure. Present: a small-scale generator with Ar gas (Ar/small) is used. Previous: a large-scale radial-flow generator (Ar–Cs/large) and a small-scale radial-flow generator with Ar–Cs (Ar–Cs/small) were used. The applied magnetic flux density is also indicated.
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