EXPERIMENTAL STUDY ON HYDRAULIC CHRACTERISTICS OF VORTEX-SUPPRESSING DEVICE IN VERTICAL INTAKE FACILITY USING PTV MEASUREMENTS

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  • PTVを用いた鉛直取水設備の渦防止桁の水理特性に関する実験的検討
  • PTV オ モチイタ エンチョク シュスイ セツビ ノ ウズ ボウシ ケタ ノ スイリ トクセイ ニ カンスル ジッケンテキ ケントウ

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Abstract

 In general intake facilities of hydroelectric power stations, intake vortices cause the air-hammer phenomena in the intake tunnel and the cavitation phenomena at blades of a water turbine generator by air-entrainments. In order to understand hydraulic characteristics of a vortex-suppressing device in a vertical intake facility, flow fields in the basic model of a vertical intake facility that combined a rectangular linear channel and a vertical pipe have been measured using a Particle Tracking Velocimetry (PTV). As a result, the relationship between installation positions of a vortex-suppressing device and number of occurrences of intake vortices indicates that the vortex-suppressing device installed near free surface and near vertical pipe is more effective.

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