二重反転形小型ハイドロタービンの非設計流量点における内部流れ

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  • 重光 亨
    徳島大学　大学院　ソシオテクノサイエンス研究部
  • 田中 地洋
    徳島大学　大学院　先端技術科学教育部
  • 福富 純一郎
    徳島大学　大学院　ソシオテクノサイエンス研究部

書誌事項

タイトル別名
  • Internal Flow of Contra-Rotating Small Hydro-Turbine at Off-Design Flow Rates
  • ニジュウ ハン テンケイ コガタ ハイドロタービン ノ ヒセッケイ リュウリョウテン ニ オケル ナイブ ナガレ

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抄録

Small hydropower generation is one of important alternative energy, and potential of small hydropower is great. Efficiency of small hydro turbines is lower than that of large one, and these small hydro turbine's common problems are out of operation by foreign materials. Then, there are demands for small hydro turbines to keep high performance and wide flow passage. Therefore, we adopted contra-rotating rotors, which can be expected to achieve high performance and enable to use low-solidity rotors with wide flow passage, in order to accomplish high performance and stable operation. In this research, performance of the contra-rotating small hydro turbine with 60 mm casing diameter was investigated by an experiment and numerical analysis. Efficiency of the contra-rotating small hydro turbine was high in pico-hydro turbine and high efficiency could be kept in wide flow rate range, however the performance of a rear rotor decreased significantly at partial flow rate. Then, internal flow condition, which was difficult to measure experimentally, was investigated by the numerical flow analysis. Then, a relation between the performance and internal flow condition was considered by the numerical analysis result.

収録刊行物

  • ターボ機械

    ターボ機械 42 (12), 777-784, 2014

    一般社団法人 ターボ機械協会

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