Abstract
The relationship between pump performance and vibration generated by cavitation was investigated using an axial-flow impeller. By experiments on cavitation 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 and vibration fluctuation at the casing wall. It was made clear in this paper that the tip clearance cavitation is proven to have a specific frequency.
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