抄録
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, we proposed an axial flow hydraulic turbine with collection device, using kinetic energy of open channel flow. The performances and flow fields of runner only, collection device only and combination of runner and collection device were clarified. It was checked the velocity increasing of collection flow in collection device by analysis result of collection device only and analysis result of output of combination of runner and collection device is larger than analysis result of runner only. However, the collection device used in these studies is non-axial symmetry. To study the effect of the blade position, we conducted the unsteady flow analysis for the combination of the runner and the collection device, compared with the steady flow analysis result. As a result, effect of the blade position on the performance of this hydraulic turbine was clarified.
