Abstract
The cavitation is used for the sewage treatment and the water quality improvement, etc. It is a research in the present study to develop the pump that doesn't need the cavitation generation device. The number of the impeller blade is 4. The intensity of cavitation was measured by the acceleration on the pump casing and the occurrence region of cavitation was observed by the photographs. The width of the casing was fixed 10mm in this case, and it experimented on the blade width by 4.5mm, 6.5mm, and 8.5mm.
