EXPERIMENTAL STUDY ON RELATIONSHIP BETWEEN SUCTION VELOCITY OF INTAKE PIPE AND OCCURRENCE OF INTAKE VORTEX IN VERTICAL INTAKE FACILITY

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  • 鉛直取水設備における取水管の吸込流速と渦発生に関する実験的検討
  • エンチョク シュスイ セツビ ニ オケル シュスイカン ノ スイコミ リュウソク ト ウズ ハッセイ ニ カンスル ジッケンテキ ケントウ

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Abstract

<p> An intake vortex is entrained air from a water surface, and it causes problems in a hydropower facility due to equipment failure. In a previous research, the authors found that an increase of a velocity in a middle and lower layers of a flow field may be related to an occurrence of an intake vortex. It maybe a key to clarify a cause of an intake vortex. In this study, inner diameters of intake pipes are changed under a condition that a flow rate and water depth are kept constant, and examined how the flow field changes. As a result, it is found that an occurrence of a large vortex such as an intake vortex is related to a number of occurrences of a small vortex and so on.</p>

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