Experimental Analysis of Rotor-Stator interaction in a Pump-Turbine

An exhaustive experimental exploration of the flow and pressure fields between runner and guide-vanes, of a pump-turbine, is performed using LDV, PIV and an unsteady 5 sensors probe. Measurements for design and off-design conditions, have been analyzed in both turbine and pump operation modes. For the pump operating regime, one of the investigated operating points is in the instability zone of the characteristic. This study case was used for CFD validations in the Thematic Network on Quality and Trust in the industrial applications of CFD: QNET-CFD AC6-04 test case