Pressure Distribution on the Inner Wall of the Volute Casing of a Centrifugal Pump

Table 5

Pressure fluctuation amplitude on the middle section of volute casing.

	Rotational speed (r/min)	Flow rate (m^3/h)	Pressure fluctuation amplitude
			31# (%)	38# (%)	43# (%)	45# (%)
Low speed	1450	5.0	62.57	75.44	72.76	57.14
Moderate speed	2000	6.0	32.47	35.43	33.26	40.56
Above average speed	2175	7.5	27.60	33.72	40.42	35.27
High speed	2900	7.5	21.47	19.48	17.51	11.13