Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 18, 2019 - March 19, 2019
Small hydroelectric power generation uses a water turbine equipped with multiple blades, and due to cost reduction it often has no dust removal facility etc., so that obstruction by foreign body is likely to occur. Therefore, we tried to use a single-blade centrifugal pump, which is widely used as a pump for sewage, as a reverse running turbine to realize a non-clog water turbine. However, in a single-blade centrifugal runner, an excessive radial thrust acts due to nonuniform pressure distribution. Therefore, in this study, we investigated the radial thrust and its constituent components of a single-blade reverse running pump turbine by CFD analysis. As a result, the time-averaged value and the fluctuation component of the radial thrust increased with the increase of the flow rate. In the radial thrust on the hydraulic part, it was found that the inertia component and the pressure component are the largest at the small flow rate and the momentum component is the largest at the large flow rate.
