The influence of submerged depth of pump station inlet on vortex

The inlet vortex of the pumping station can endanger the operation of the pump and reduce the performance of the pumping station.The occurrence and development of the intake vortex is related to the submerged depth of the intake.In this paper,five different submerged depths were selected based on the actual operation of the pumping station,and therefore,the numerical simulation was carried out by using fluent software.The flow field structure of the intake of different submerged depths were analyzed,and then the vortex value and the distribution law of vortex were obtained.The results showed that submerged depth at 0.09D (intake height of passage) to 0.2D and constant flow rate,the vortex strength become smaller with the increase of submerged depth..The vortex intensity of the 0.09D submerged depth was the largest,and there was no obvious vortex at the submerged depth of 0D and 0.05D.The results also revealed that when the submerged depth was 0.09D,0.14D and 0.2D,respectively,the vortex was terminated near 0.3 m below the top plate.The research results can provide a reference for the design of the inlet submerged depth of the pumping station.

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