Numerical and experimental investigations of channel flows in a disk-type drag pump

Hwang, Young‐Kyu; Heo, Joong-Sik; Choi, Wook-Jin

doi:10.1063/1.1407655

Cited by 3 publications

(2 citation statements)

References 6 publications

(8 reference statements)

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“…In terms of numerical simulation research, remarkable achievements have been made in recent years: Constantinescu and Patel 3 used numerical simulations of turbulence in a rectangular tank with a Reynolds number of 60,000 to predict the position and intensity of the free surface and Coanda vortex. Hwang et al 4 . using numerical simulations and corresponding tests, obtained the velocity field and density field through the direct simulation Monte Carlo (DSMC) technique.…”

Section: Introductionmentioning

confidence: 99%

“…(1),(4), and (17) can all be simplified as:Continuity equation: ∇ • (𝜌 𝑚 𝑣 𝑚 ⃗⃗⃗⃗⃗ )=0 (21) Momentum equation: ∇ • (𝜌 𝑚 𝑣 𝑚 ⃗⃗⃗⃗⃗ 𝑣 𝑚 ⃗⃗⃗⃗⃗ ) = −∇𝑝 + ∇ • [𝜇 𝑚 (∇𝑣 𝑚 ⃗⃗⃗⃗⃗ + ∇𝑣 𝑚 ⃗⃗⃗⃗⃗ 𝑇 )] + 𝜌 𝑚 𝑔 + 𝐹 −∇ • (∑ 𝛼 𝑘 𝜌 𝑘 𝑣 𝑑𝑟,𝑘 ⃗⃗⃗⃗⃗⃗⃗⃗⃗ 𝑛 𝑘=1 𝑣 𝑑𝑟,𝑘 ⃗⃗⃗⃗⃗⃗⃗⃗⃗ ) (22) The volume fraction of the second phase sediment is: ∇ • (𝛼 𝑝 𝜌 𝑝 𝑣 𝑚 ⃗⃗⃗⃗⃗ ) = −∇(𝛼 𝑝 𝜌 𝑝 𝑣 𝑑𝑟,𝑝 ⃗⃗⃗⃗⃗⃗⃗⃗⃗ ) + ∑ (𝑚̇𝑞 𝑝 − 𝑚̇𝑝 𝑞 ) 𝑛 𝑞=1 (23) a. Structural layout of the forebay of the pump station b.…”

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confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

mentioning

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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3D Numercial Simulation of Elbow-Inlet Passage

Cheng

Zhou

Liu

et al. 2009

Advances in Water Resources and Hydraulic Engineering

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The flow patterns and sediment deposition in the forebay of a forward-intake pumping station

Wang

et al. 2022

Physics of Fluids

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In Northwest China, the concentration of sediment in the Yellow River is high. The flow patterns in the forebay and inlet tank of a pumping station on the river are disordered, and sediment deposition endangers the normal operation and safety of the pumping station. To address this problem, the three-dimensional two-phase water–sediment flow in the forebay of the pumping station is modeled using fluid simulation software, and diagrams of the sediment content and velocity streamline in the flow layers of different sections are obtained. Combined with the multiphase flow theory of mixtures and the realizable [Formula: see text] 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, and the operating conditions of each pump port under different unit operating conditions are proposed. The results show that the deposition of sediment has different effects on the outlets of the pumps, but its impact on pump Nos. 4, 5, and 6 is small. After desilting, the velocity uniformity and deflection angle of pumps 4, 5, and 6 are improved to a certain extent. This study provides specific guidance for the construction and reconstruction of a pumping station forebay to avoid the impacts of backflow areas and sediment deposition to a certain extent.

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Numerical and experimental investigations of channel flows in a disk-type drag pump

Cited by 3 publications

References 6 publications

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

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

3D Numercial Simulation of Elbow-Inlet Passage

The flow patterns and sediment deposition in the forebay of a forward-intake pumping station

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