Influence of the Balance Hole Circumferential Position on the Cavitation Performance of the Semiopen Impeller Centrifugal Pump

Table 1

Main parameters of semiopen impeller centrifugal pump.

Parameter	Numerical value
Design flow rate (m^3/h)	6
Design head H (m)	6
Rotational speed n (rpm)	1500
Specific speed ns	58
Impeller inlet diameter D1 (mm)	52
Impeller outlet diameter D2 (mm)	166
Impeller outlet width b2 (mm)	3.5
Impeller inlet laying angle β1	65°
Impeller outlet laying angle β2	20°