Abstract
A hydraulic turbine for an open channel can generate power at low head and doesn't affect the environment because it doesn't have incidental equipment. However, because the rotational speed is low, the hydraulic turbine outer diameter becomes large. Therefore, an axial flow hydraulic turbine with collection device, using kinetic energy of open channel flow, is proposed. The performance and flow field of impeller only, collection device only and combination of impeller and collection device were clarified. It was checked the speed increasing of collection flow in collection device by analysis result of collection device only and analysis result of output of combination of impeller and collection device is larger than analysis result of impeller only.
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