Effect of suction pipe inlet condition on the occurrence of vortex in pump sump

Guo, Ming; Chen, Zhenmu; Choi, Young‐Do

doi:10.1088/1755-1315/240/6/062023

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…Because producing a vacuum with compressed air is significantly less efficient than using other principles [ 10 ]. The choice of acrylic material for the model was justified by easy visualization of the fluid flow including vortex, swirls, and waves to name a few [ 11 ]. Water and canola –oil were used at room temperature to simulate molten aluminum and electrolytic bath respectively.…”

Section: Methodsmentioning

confidence: 99%

Physical and numerical modeling of the mechanisms of bath entrainment from the aluminum tapping tube intake

Kabezya

2023

Heliyon

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Section: Methodsmentioning

confidence: 99%

Physical and numerical modeling of the mechanisms of bath entrainment from the aluminum tapping tube intake

Kabezya

2023

Heliyon

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“…The Results of the tests showed that the use of varying angles of intake from vertical to horizontal decreased strength of vortices by 35% for single and 31% for dual intakes. Guo, et al, 2019 in [4] studied the influence of suction pipe intake condition on the appearance of the vortex in pump sump. They worked on an experimental model of pump sump that had been designed and executed with a single pipe to validate the happening of the vortex.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation to Investigate the Occurrence of Vortices at Double Vertical Pumps Intakes

Kadhim¹,

Thamiry²

2021

JAARU

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The pumping station is widely used in our modern life. The occurrence of the vortex at pumpsump, which is causing air entering pipe intake, is a common problem in the design of pumps. Thisphenomenon, including surface and sub-surface vortex, may lead to damage to the pumping structure, highpower consumption, and loss in pump performance. In some requirements, the multiple suction pipes areusing to get the required flow. Due to this arrangement, the performance of the suction pipes will influence.This paper is aimed to investigate the occurrence of vortices around the flow pattern of two pumps by usingComputational Fluid Dynamic (CFD) code Fluent. This CFD model is based on solving Navier-Stockequations by finite volume method. The model of double suction pipes was investigated under five differentsubmergence depth (S) and five different suction velocities (v). The SST k-ω turbulence model was selectedfor the turbulence. The results showed that the air entering vortex does not appear when the submergencedepth (S) is equal or greater than 1.5 times from the diameter of the bellmouth for intake pipe (D). Thesurface vortex appeared obviously when the submergence depth (S) equals to 1.25D and the Froude numberat the bell is equal to or greater than 1.028, and appeared clearly when the (S/D=1) and Froude number isequal to or more than 0.77. The nearer attached wall vortex does not appear when the space from the centerof the suction pipe to the sidewall (C) equals 2 times of bell diameter.

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Evolution of air-entraining vortices in inclined intake pumping stations under low sump water depth condition

Li,

Feng,

Zhu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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The air-entraining vortices may appear in a pump sump when the pumping station operates at a low water depth, which will induce undesirable phenomena such as cavitation and vibration. In this paper, the evolution process of air-entraining vortices is studied in detail based on the volume of fluid (VOF) two-phase flow numerical simulation method, to clarify its hydraulic characteristics and influence. The results show that the water-air interface in the sump varying periodically with time under a low water depth consists of four stages, that is, slow rise, fast rise, continuous stability and reduction. The shape of the air-entraining vortices shows a periodic evolution under the interference of water surface fluctuations, from the surface dimple to the full air core to intake, then to the vortex pulling air bubbles to intake, and finally back to the surface dimple. The inhaled air volume fraction in the suction pipe changes with the evolution of the air-entraining vortices. In addition, the average angle of velocity distribution and the average swirl angle are analyzed in depth to improve the understanding of flow pattern caused by the complicated and diversified inhaled air.

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Effect of suction pipe inlet condition on the occurrence of vortex in pump sump

Cited by 4 publications

References 1 publication

Physical and numerical modeling of the mechanisms of bath entrainment from the aluminum tapping tube intake

Physical and numerical modeling of the mechanisms of bath entrainment from the aluminum tapping tube intake

Numerical Simulation to Investigate the Occurrence of Vortices at Double Vertical Pumps Intakes

Evolution of air-entraining vortices in inclined intake pumping stations under low sump water depth condition

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