Numerical Simulation Of BPF Pressure Pulsation Field In Centrifugal Pumps

Abstract

There is a close link between the pressure pulsation in the pump working cavity and its vibration and noise level. Due to a current trend in increasing rotation speed and power, the problem of noise, vibration, and pressure pulsation in centrifugal pumps becomes a more urgent question. Usually the level of tone spectrum components determines the pump vibration and noise characteristics, and mainly these are blade-passing frequencies (BPF). They result from nonstationary hydrodynamic interaction between the impeller flow and pump casing. The method for computation of BPF pressure pulsations in the working cavity of a centrifugal pump is based on a representation of nonstationary motion of a compressible medium as a combination of acoustical waves and pseudo sound perturbations.