Effect of Externally Applied Radio-Frequency Electromagnetic Field on the Performance of Disk MHD Generator

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  • ディスク形MHD発電機の性能に与える高周波電磁界印加の効果
  • ディスクガタ MHD ハツデンキ ノ セイノウ ニ アタエル コウシュウハ デンジカイ インカ ノ コウカ

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Abstract

The effects of externally applied radio-frequency (rf) electromagnetic field on the non-equilibrium and the performance of a disk MHD generator were examined experimentally. As a preliminary experiment, the plasma production by applying the rf electromagnetic field was attempted in the disk generator (Disk-PIA), in which rf induction coils were embedded in one-side disk wall, under the conditions of no seeding, no flow and no magnetic filed. From the result of the preliminary experiment, it was confirmed that the argon plasma (_??_110Torr) was produced uniformly in the azimuthal direction by the rf electromagnetic field even in the presence of exposed anodes in the faced disk wall and metallic support at the disk center. In MHD power generation experiments with the Disk-PIA installed in the shock-tube facility, the increase in the electrical output and more indiscrete discharge attributed to the rf electromagnetic field were verified with well reproducibility for the first time.

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