超音速ファラデー型MHD発電機の断熱効率

概要

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Objectives of the present experimental study are to investigate adiabatic efficiencies of a supersonic Faraday MHD (magnetohydrodynamics) generator with cesium seeded argon and at the same time to achieve high enthalpy extractions. MHD power generation experiments were carried out with a shock tube facility. The MHD channel has 35 pairs of electrodes and the width between its insulator walls is expanded along the flow direction. Total pressures were measured at the exit of the MHD channel and total pressure losses were evaluated. Furthermore, the adiabatic effciency was measured for the first time in the present experiments in which an enthalpy extraction ratio of about 10% was achieved. Comparison of these results with those for a disk generator indicates that a Faraday generator has higher adiabatic efficiencies at the same enthalpy extraction ratio. Influences of voltage drops on loading parameters and electrical efficiencies are also discussed.
1995-06-25