生物共存機械-魚通過可能水車の開発研究 : 水車ランナを通過する魚の速度と通過様式の関係

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This paper describes the relationships among rotation speed of runner, setting angle of blade, chord length, number of blade, chord length, number of blade, and the necessary swimming velocity of fish which pass through the runner theoretically. With fish experiment, the swimming velocity of fish is examined by many video films. Comparing with the data of theoretical prediction and experiment, in non-load operation, both are consistent. But in load operation, the fish velocity of experiment is less than that of theoretical prediction. The main reason is that most of fishes which passed through the runner are touched by blade. Fishes spend the time to swim away from the blade after touching the blade. We also investigated the hit position of fish body. In the condition of rotation speed below 200 rpm, except the head and the upper half of the body, the damage and mortality of fish will not happen. But the actual swimming velocity becomes slower. The higher is the rotation speed and the less is the blades number, the faster is the fish swimming velocity. The fish goes through the runner with the best speed which they decide and they choose the easiest course in the passage and regulate the swimming velocity themselves. The results supply the data for the study of biology co-exist water turbine.
社団法人日本機械学会の論文
1998-08-25