Experimental Studies on Lower Head Axial Water Turbine with Passing Fish. Comparison of Load Operation with Nonload Running.

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  • 極低落差軸流水車と魚通過に関する実験的研究　発電運転時と無負荷時の比較
  • キョク テイ ラクサ ジクリュウ スイシャ ト サカナ ツウカ ニ カンスル

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Abstract

A water turbine through which fish can pass is studied in optimum-load operation. In order to examine the effects of the pressure and flow velocity on fish passing through the runner, four casings are used: one straight, two diffusers and one draft tube. A single stage axial runner is used. From the results of the measurement of the velocity and pressure distributions inside the turbine casing, the negative pressure and the flow velocity in which fish can swim are investigated. The kinds of fish tested are amago salmon and rainbow trout. Photographs of fish passing through the rotating runner are taken and analyzed.

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