Noise and vibration generated by cavitation in an axial-flow pump
Book
·
OSTI ID:100914
- Ebara Research Company, Limited, Tokyo (Japan). Dept. of Hydrodynamics Research and Development
The relationship between pump performance and noise and vibration generated by cavitation was investigated using an axial-flow impeller. At first, the cavitation pattern was classified into four types which are concerned with the area of cavitation occurrence and pump operating conditions relative to pump performance. Pump performance, especially changes in the pump head and the shaft power curves are clearly related to the extent of cavitation growth on the suction side of the blades. The spectrum of pressure measured on the impeller casing depends mainly on the tip clearance cavitation development. Levels of high frequency component over 1 kHz increase remarkable as cavitation grows, and there are no discrete components in the high frequency range. Casing vibration and cavitation noise are concluded to be brought about by pressure fluctuations. From the total point of view of cavitation shock pressure, pressure fluctuation, casing vibration and air-borne noise, one type of index is proposed for the limitation of pump operation under cavitation conditions instead of the 3% head drop point.
- OSTI ID:
- 100914
- Report Number(s):
- CONF-940659--; ISBN 0-7918-1373-8
- Country of Publication:
- United States
- Language:
- English
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