By use of PIV LIF it was possible to obtain information about the velocity field outside and inside the cavitating zone. An additional camera provided information about the location and extent of cavitation. Periodical evolution of cavitation structures, from incipient to developed is seen during each passing of a blade. Greater consideration should be given to cavitation on the tongue of the volute because it causes the 3% head drop. Moreover, the appearance of unsteady cavitation can cause severe erosion to the solid surfaces.
COBISS.SI-ID: 11477531
New rotor runner design, made from porous material enables smoother operation and consequently higher efficiency.
COBISS.SI-ID: 10925851