Study on Output Characteristics of an Undershot Water Turbine for Extra-Low Head

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  • 超低落差用投込み式下掛け水車の出力特性に関する研究
  • チョウテイラクサヨウ ナゲコミ シキ カ カケ スイシャ ノ シュツリョク トクセイ ニ カンスル ケンキュウ

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Abstract

<p>In order to recover the small hydraulic energy in extra-low head but enough flow rate, the output characteristics of a semi-immersion type undershot water turbine was evaluated by the water funnel test. The momentum of the main flow was exchanged to the output power of the water turbine by the primary blade faced to the main flow. In the case of such kind of water turbine, it is effective to design the number of blades appropriately small number not to be impeded the conversion from the momentum of the main flow to the angular momentum of the primary blade. Furthermore, we clarified that when the pitch angle of the primary blade is designed to be perpendicular to the main flow, it is possible to effectively recover the small hydraulic energy of extra-low head.</p>

Journal

  • Turbomachinery

    Turbomachinery 47 (4), 200-207, 2019

    Turbomachinery Society of Japan

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