Abstract
The pump was investigated about the behaviors under cavitating conditions. Change in the pump head and the shaft power curves are closely related to the cavitation growth on the suction side of the blades. By experiments on cavitation aspects of an axial-flow pump, the growth of cavitation due to the change of the net positive suction head (NPSH) and the pump performance were clarified. Moreover, the frequencies of cavitaion were disclosed by conducting the wavelet analysis on pressure fluctuation at the casing wall. It was made clear in this paper that the tip clearance cavitation is proven to have a specific frequency.
