Comparison of Performances of Scramjet-Driven Experimental DCW-MHD Generators with Different Cross-Section

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  • Niwa Naoyuki
    Graduate School of Systems and Information Engineering, University of Tsukuba
  • Takahashi Toru
    Graduate School of Systems and Information Engineering, University of Tsukuba
  • Fujino Takayasu
    Graduate School of Systems and Information Engineering, University of Tsukuba
  • Ishikawa Motoo
    Graduate School of Systems and Information Engineering, University of Tsukuba

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Other Title
  • 異なる断面形状を持つスクラムジェットエンジン搭載用DCW-MHD発電実験機の性能比較
  • コトナル ダンメン ケイジョウ オ モツ スクラムジェットエンジン トウサイヨウ DCW-MHD ハツデン ジッケンキ ノ セイノウ ヒカク

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Abstract

The purpose of this study is to examine the influence of shape of cross-section of scramjet engine driven experimental DCW-MHD generator on generator performance by three-dimensional numerical analyses. We have designed the MHD generators with symmetric square and circular cross-section, based on the experimental MHD generator with asymmetric square cross-section. Under the optimum load condition, the electric power output becomes 26.6kW for the asymmetric square cross-section, 24.6kW for the symmetric square cross-section, and 22.4kW for the circular cross-section. The highest output is obtained for the experimental generator with asymmetric square cross-section. The difference of electric power output is induced by the difference of flow velocity and boundary layer thickness. For the generator with asymmetric square cross-section, the average flow velocity becomes the highest and the boundary layer becomes the thinnest. The compression wave is generated depending on the channel shape. The difference of flow velocity and boundary layer thickness is induced by the superposition of compression wave.

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