Rational Design of a Pump-Sump and Its Model Testing

Ahmad, Z.; Jain, Bhavesh; Kumar, Sanjeev; Mittal, M.K.

doi:10.1061/(asce)ps.1949-1204.0000074

Cited by 11 publications

(4 citation statements)

References 9 publications

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“…For traditional pumping stations, the intake vortex should be avoided or at least restricted in consideration of the negative impact of the vortex on stable operation of the pump [29]. In accordance with this principle, auxiliary devices have been attempted to suppress the inlet vortex [30][31][32]. However, for the prefabricated pumping station considered here, the pump inlet section was located near the tank bottom and the intake vortex promotes the entrainment of sand particles.…”

Section: Velocity Distribution Of Sand Particlesmentioning

confidence: 99%

Optimization of Tank Bottom Shape for Improving the Anti-Deposition Performance of a Prefabricated Pumping Station

Kang

Teng

et al. 2019

Water

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High flexibility of prefabricated pumping stations in collecting and transporting storm water has been recognized. Nevertheless, flows inside such a complex system have rarely been reported. The present study aims to reveal water-sand flow characteristics in a prefabricated pumping station and to optimize geometric parameters of the tank to mitigate sand particle deposition. Five tank schemes, varying in the ratio of the diameter to the height of the tank bottom (D/L), were investigated. Flows in the pumping station were simulated using the computational fluid dynamics (CFD) technique. Test data were used to validate the numerical scheme. Three-dimensional water-sand flows in the pumping station were described. Underlying mechanisms of sand particle deposition were explained. The results indicate that the risk of deposition is high at the tank bottom side, close to the tank inlet. Both the tank bottom geometry and the inlet suction of the pump contribute to sand particle deposition. The averaged sand volume fraction at the pump inlet reaches its minimum at D/L = 3. Sand particle velocity at the pump inlet varies inversely with D/L. The highest intensity of the vortex at the pump inlet arises at D/L = 3. The best anti-deposition performance of the pumping station is attained at D/L = 3.

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Section: Velocity Distribution Of Sand Particlesmentioning

confidence: 99%

Optimization of Tank Bottom Shape for Improving the Anti-Deposition Performance of a Prefabricated Pumping Station

Kang

Teng

et al. 2019

Water

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“…Much research in recent years has focused on the complex flow patterns in pump intake of the pump station. It is mainly obtained (a) the corresponding flow patterns for the critical water level case (the depth at which the vortex pulling serial air bubbles to the intake pipe) in the pump intake [12,13] ; (b) prediction of the critical water level of the pump intake [14,15] ; (c) simulation and elimination the various negative flow patterns in the pump intake [16][17][18][19][20] . These studies were interpreted by the numerical calculation and model test.…”

Section: Introductionmentioning

confidence: 99%

Experimental complex flow patterns in the pump intake with a low water level

Guo

Tang

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The present paper is an extension of the authors’ previous work [1], and the goal is to analyze and reveal the complex flow patterns in the pump intake with a low water level (lower than the critical water level) through PIV Technology (Particle Image Velocimetry). The results show that: the lower the water level (a) the geometric scale of the free-surface vortices increases, which potentially leads to pulling more air into the pipe system and the pump units of the pump station; (b) the sidewall-attached vortices have a larger geometric scale; (c) more backwall- and floor-attached vortices are captured, and their geometric scale is large. In brief, the experimental data of the paper indicate that the free-surface, backwall-, and floor-attached vortices are the main characters of the pump intake with a low water level. In engineering, the vortex suppression/eliminating devices in the vicinity of these locations should be emphasized.

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“…In terms of the physical model test, the volumetric three-component velocimetry system [11] has been used to study the variation in the velocity gradient, vortex intensity, and kinetic energy in the vortex zone during the process. A study also utilized a miniature physical model of equal ratio [12] in the design optimization of the pump sump. However, these studies merely used physical model tests to study individual engineering, and their results are not universal.…”

Section: Introductionmentioning

confidence: 99%

Formation Mechanism of an Adherent Vortex in the Side Pump Sump of a Pumping Station

Wang¹,

Lü²

2021

Int. j. simul. model.

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The inflow of the side pump sump is not smooth enough during the operation of a pumping station, resulting in an asymmetric adherent vortex that endangers the station's normal operation and safety. To solve this problem, flow field and vorticity distribution charts of different flow layers were created through the establishment of a numerical model of the pumping station inflow by means of the fluid simulation software. The formation mechanism of the asymmetric adherent vortex in the side pump sump was analysed by combining Reynolds shear stress distribution, the simplified Navier-Stokes equation, and the transport equation of turbulent kinetic energy. Furthermore, the accuracy of the numerical simulation results was verified using flow field data collected via particle image velocimetry at the junction of the forebay and pump sumps of the station. Results show that the distribution of inflow velocity is uneven due to the asymmetric friction of the inflow in the side pump sump. The transverse velocity formed from it generates the asymmetric vortex in the side pump sump and creates an inspiratory vortex.

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Rational Design of a Pump-Sump and Its Model Testing

Cited by 11 publications

References 9 publications

Optimization of Tank Bottom Shape for Improving the Anti-Deposition Performance of a Prefabricated Pumping Station

Optimization of Tank Bottom Shape for Improving the Anti-Deposition Performance of a Prefabricated Pumping Station

Experimental complex flow patterns in the pump intake with a low water level

Formation Mechanism of an Adherent Vortex in the Side Pump Sump of a Pumping Station

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