Numerical Simulation and Analysis of the Transient Flow and Head Distribution through a Single Blade Centrifugal Pump Impeller

摘要

The analysis of the transient head and flow distribution through a single blade centrifugal pump impeller using computational fluid dynamics is presented. The hydraulic performance is characterised by significant fluctuations in head and required power with each revolution. This research investigates the source of the head fluctuations and the transient nature of the flow field. The analysis shows very significant variation in head, radial velocity and velocity outlet angle with angular position for any given impeller position. The effects of reduced and increased flowrates on the pressure fluctuations and the hydrodynamics of the pump were also discussed and show the presence of significant three-dimensional flow effects.