Influence of Leading and Trailing Edge Angle on Impeller Blades of a Pump as Turbine

A pump as turbine (PAT) is a turbomachine that converts hydraulic energy into electricity. One of the study topics in PAT efficiency due to centrifugal pumps are not designed operate reverse mode. Geometric variations impeller have been studied literature. However, it was possible evidence influence inclination blade leading and trailing edge. Therefore, objective this work analyze numerically fluid dynamically angle edge pump, First, characteristic curve validated. Then, modified, range 25° 90°, obtaining head, efficiency, power graph. As result, mode evidenced an close 90° on provides higher 50.26% decreases until 40.77% when approaches 30°, reducing head around 20%, while remained constant. In mode, inverse effect obtained, where maximum 60.9% generated increased up 4.76 kW angular variation adequate there loss capacity.