The transient air-water two-phase flow field in 65ZB-40 self-priming centrifugal pump du-ring self-priming period was simulated numerically by using the standard k-ε turbulence model, VOF multi-phase model, sliding mesh technique and the velocity profile measured at the inlet of the pump to disclose self-priming mechanism. The transient pressure, velocity and void fraction of the two-phase flow in the pump were acquired at 10 monitoring points in the volute and in 8 zones inside the impeller. The results revealed that the pressure and void fraction experience a rapidly transient process in most area of flow field inside the pump at the early and late stages of self-priming period. At the early stage of self-priming period, the velocity at the impeller entrance, in the cross-sections of volute, reflux hole and inlet to the air separation chamber oscillates, showing a dominated transient effect.
LI Hong,XU De-Huai,LI Lei et al. Numerical simulation of transient flow in self-priming centrifugal pump during self-priming period[J]. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(7): 565-569.