Abstract
Pump sump is an indispensable facility in irrigation, drainage, agriculture and industrial processes. The water intake conditions play an important role on the performance of the whole system. However, there are different kinds of undesirable vortices usually occurred in pump sump, such as submerged vortex, air entrained vortex. Accompanying with the variety of vortex, noise and vibration are also produced. In this study, a scale down model of pump sump has been designed and constructed. The occurrence of vortex is the concentrated target which was investigated under different suction pipe inlet conditions. Moreover, with respect to the different water levels, flow rate and a fixed distance from the bottom to suction pipe bell mouth detailed experiments were conducted. In addition, a Computational Fluid Dynamics (CFD) analysis method also has been carried out in this paper, aimed at verifying the effect of pipe inlet condition on visualization and formation of vortex which have been obtained by experiment. The comparison of CFD analysis and detailed experiments results were discussed and described.
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