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

Wang, Xi; Lü, Wenpeng

doi:10.2507/ijsimm20-2-562

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…This approach yielded an 8% enhancement in the uniformity of the flow velocity in the front pool, as well as an impressive 70% reduction in the vortex area. By employing the image velocimetry technique, Xi and Lu [15] acquired flow field data from both the front and inlet tanks of the pump station, subsequently substantiating these data through comprehensive numerical simulations. This research findings notably revealed an asymmetrical nature of the inlet vorticity in the forebay of the lateral pumping station.…”

Section: Introductionmentioning

confidence: 98%

Analyzing Water and Sediment Flow Patterns in Circular Forebays of Sediment-Laden Rivers

Wang,

Tai,

Huang

et al. 2023

Sustainability

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In the circular forebay of sediment-laden rivers, adverse flow patterns such as vortices emerge, leading to substantial sediment accumulation along the sidewalls of the diversion channel and in the forebay. This sediment accumulation significantly impacts the operational efficiency of water pumps. To address these challenges, a combination of numerical simulations and engineering experiments was employed to reveal the factors contributing to the development of these patterns. Based on these findings, seven distinct flow rates and operating conditions were introduced to obtain the optimal inlet flow rate and increase the sustainability of engineering use. The findings revealed that the different inlet flow rates exert varying influences on the flow patterns in the circular forebay, leading to changes in sediment levels in both the forebay and diversion channels. Following comprehensive comparison, Scheme 6 was identified as the optimal flow rate scheme. In this scheme, the flow uniformity, deviation angle, ratio of the vortex reduction area parameter, and rate of vortex area reduction in sections z1−3 were markedly enhanced. The effectiveness of this scheme was validated through rigorous numerical simulations and engineering experiments, thereby offering indispensable theoretical insights into the operation of pumping stations in circular forebays.

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Section: Introductionmentioning

confidence: 98%

Analyzing Water and Sediment Flow Patterns in Circular Forebays of Sediment-Laden Rivers

Wang,

Tai,

Huang

et al. 2023

Sustainability

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“…At the same time, a gradually increasing number of researchers are applying numerical simulations of the forebays of pump stations. Xi and Lu 6 analyzed the formation mechanism of nonsymmetric adhesive vortices in lateral pumping stations by using numerical simulation combined with Reynolds shear stress distributions. Jie-min et al 7 .…”

Section: Introductionmentioning

confidence: 99%

Analysis and Study of Flow Patterns and Sediment Deposition in the Forebay of a Forward Intake Pumping Station

WANG

et al. 2022

Preprint

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In Northwest China, the sediment concentration of the Yellow River is high. A project to investigate the operation of a pumping station shows that the flow patterns in the forebay and inlet tank are disordered, and there is sediment deposition that endangers the normal operation and safety of the pumping station. To solve this problem, the three-dimensional two-phase water-sediment flow in the forebay of the pumping station is modeled by using fluid simulation software, and diagrams of the sediment volume fraction content and vector distribution in the flow layers of different sections are obtained. Combined with the multiphase flow theory of mixtures and the realizable turbulent kinetic energy equation, the location and formation mechanism of each vortex, as well as the area and degree of sediment deposition in the forebay, are analyzed. The actual engineering and numerical simulation results are compared to verify the accuracy of the simulation. The results show that the main reason for sediment deposition is the high sediment concentration of the Yellow River, but the flow pattern disorder is affected by a specific design defect of the forebay, which makes the sediment deposition worse. The results of this study provide specific guidance and methods for the construction and transformation of the forebay of the pump station in the future; construction to weaken the return area to a certain extent can reduce the degree of sedimentation.

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“…Wang et al [2] used the CFD method to simulate the three-dimensional turbulent flow in the coupled half-elbow sump of a large diameter axial flow pump, and found that there were increases in an obvious reflux phenomenon in the half-elbow sump and strong flow inhomogeneity at the outlet of the sump. Based on Reynolds shear stress distribution, a simplified Navier-Stokes equation, and a turbulent kinetic energy transport equation, Xi et al [3] analyzed the formation mechanism of asymmetrically attached vortices in the side pump sump. Padmanabhan et al [4] analyzed the scale effect of the experimental model of inflow flow.…”

Section: Introductionmentioning

confidence: 99%

Study on the Hydraulic and Energy Loss Characteristics of the Agricultural Pumping Station Caused by Hydraulic Structures

Jiao

Cheng

et al. 2022

Agriculture

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The pumping station is an important part of the agricultural irrigation and drainage system. The sump is one of the common water inlet types of agricultural pumping stations. In the sump, to facilitate the installation and maintenance of equipment, some hydraulic structures, such as pump beams, maintenance platforms and chest walls, are added to the sump. At present, the impact of hydraulic structures in the sump on the hydraulic performance of the pump device is not clear, so this paper focused on the impact of hydraulic structures on the hydraulic characteristics and entropy generation characteristics of the pump device by using numerical simulation methods. The results showed that the installation of hydraulic structures in the sump has the greatest impact on the efficiency of the pump device. The efficiency coefficient increased after adding a pump beam in the sump and decreased by about 2% after adding a maintenance platform and a water retaining chest wall. Results also showed that the installation of hydraulic structures in the sump will lead to uneven distribution of entropy generation in the sump, especially in the vicinity of the hydraulic structures. The installation of the maintenance platform and chest wall will lead to the increase of the total entropy generation in the sump, which also means that the hydraulic loss in the sump will increase accordingly. Hence, in addition to the pump beam, other structures should be avoided in the sump.

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

Cited by 8 publications

References 23 publications

Analyzing Water and Sediment Flow Patterns in Circular Forebays of Sediment-Laden Rivers

Analyzing Water and Sediment Flow Patterns in Circular Forebays of Sediment-Laden Rivers

Analysis and Study of Flow Patterns and Sediment Deposition in the Forebay of a Forward Intake Pumping Station

Study on the Hydraulic and Energy Loss Characteristics of the Agricultural Pumping Station Caused by Hydraulic Structures

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