312 集水装置を有する軸流水車の高性能化に関する研究(OS9 オーガナイズドセッション《熱・流体・エネルギー変換工学の進展》)

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  • 312 Study on Performance lmprovement of an Axial Flow Hydraulic Turbine with a Collection Device

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A hydraulic turbine for open channels does not need the incidental facilities for conducting water. It is applicable even if an effective head is comparatively low. However, because rotational speed is low, it has the tendency to enlarge. Therefore, the hydraulic turbine is fixed to a setting position. Authors proposed the new portable hydraulic turbine that utilizes the kinetic energy of an open-channel flow, such as a river and an irrigation canal. This hydraulic turbine is a structure which added collection device to the axial flow runner, and increase in an output is aimed at by making a flow collect and accelerate. In this study, characteristics and flow fields of the runner simple substance, and the complex of the runner and collection device which differ in airfoil and number of blades are clarified by numerical analysis. Furthermore, effects of airfoil and number of blades exerted on performance of this hydraulic turbine are clarified.

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