Empirical and numerical advancements in gas-liquid separation technology: A review

Qiu, Zhi; Zhou, Ling; Bai, Ling; El-Emam, Mahmoud A.; Agarwal, Ramesh

doi:10.1016/j.geoen.2023.212577

Cited by 8 publications

(3 citation statements)

References 153 publications

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“…Fleder et al [24] compared the effects of three turbulence models, Shear Stress Transport (SST) k-ω, k-ω, and k-ε, on the numerical simulation of vortex pumps, finding that all three models are applicable. Compared to k-ω and k-ε, the SST k-ω turbulence model can freely switch between the mainstream and near-wall regions [25,26]. Therefore, the SST k-ω turbulence model is employed in this study for the numerical simulation of the vortex pump utilizing ANSYS FLUENT 2022 R1 commercial software.…”

Section: Numerical Simulation and Experimental Validation 21 Turbulen...mentioning

confidence: 99%

Numerical and Experimental Analysis of Vortex Pump with Various Axial Clearances

Zhou,

Bai

et al. 2024

Water

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Axial clearance is a critical parameter affecting the performance of vortex pumps. In this study, numerical simulation and experimental validation methods are employed to establish four different clearance schemes. The analysis focuses on multiple aspects, including the internal flow field, clearance flow field, leakage flow, and recirculation flow, to investigate the impact of axial clearance on the internal flow field and the external characteristics of the vortex pump. The results indicate that under the pressure difference between the inlet and outlet, the main flow leaks from the high-pressure region at the outlet to the clearance flow channel, and the clearance flow returns to the main flow channel at the low-pressure region of the inlet. As the axial clearance increases, the intensity of the vortices inside the pump gradually decreases. This leads to a reduction in intensity of the momentum exchange between the fluid inside and outside the impeller, causing a decline in the pump performance curve. Simultaneously, the increase in clearance reduces the flow resistance in the clearance region, and the clearance flow gradually stabilizes. The interaction between the clearance flow and the main flow intensifies, causing the leakage flow and recirculation flow to increase rapidly, which results in significant energy loss.

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Section: Numerical Simulation and Experimental Validation 21 Turbulen...mentioning

confidence: 99%

Numerical and Experimental Analysis of Vortex Pump with Various Axial Clearances

Zhou,

Bai

et al. 2024

Water

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“…The Volume of Fluid model (VOF), Mixture model, and Two-Fluid Model (TFM) are used to simulate the separation processes of hydrocyclones. The Discrete Element Method (DEM) and Multiphase Particle in Cell (MPPIC) are coupled to further describe the separation characteristics of hydrocyclones under specific conditions. − Padhi et al introduced the interaction coefficients and obtained the Algebraic Slip Mixture model (ASM) by modifying the shear lift, settlement resistance, and viscosity coefficients of the mixture model and simulated and verified the classification and separation performance of multicomponent particles of silica and magnetite powders. Hou et al utilized the RSM–TFM model to study the effects of the drag coefficient, wall roughness, and friction stacking limitation on the separation performance of flat-bottomed hydrocyclones during the simulation and obtained a reasonable range of values for the above parameters.…”

Section: Introductionmentioning

confidence: 99%

Study on the Separation Performance of a Two Cylindrical Section Hydrocyclone under Various Height Ratios

Liu,

Chen,

Hou

et al. 2024

ACS Omega

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Two cylindrical section hydrocyclones can suppress particle misplacement by regulating the circulation flow, but few researchers have investigated the effect of the cylindrical height ratio. In this paper, numerical simulations and physical tests were conducted to investigate the effect of height ratio on the particle motion behavior and separation performance of the two cylindrical section hydrocyclone. According to the numerical simulation results, with increasing height ratio, the separation cut size decreased, the separation accuracy and recovery rate of medium and coarse particles in the underflow increased, the coarse particle misplacement in overflow decreased significantly, and the proportion of medium particle circulation flow gradually increased. According to the test results, the number of misplaced fine particles in underflow could be effectively reduced when H 1 /H 0 = 0.30. With increasing height ratio, the number of misplaced coarse particles in the overflow decreased and the classification efficiency of fine particles increased. The maximum separation efficiencies of medium and coarse particles could be obtained at H 1 /H 0 values of 0.47 and 0.17, respectively. Therefore, increasing the height ratio could inhibit coarse particle misplacement in overflow and improve the separation performance of two cylindrical section hydrocyclones.

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“…With the increasing exploitation of land-based fossil energy, attention is gradually shifting toward the seabed, which harbors abundant oil and gas resources (Dai et al, 2023;Qiu et al, 2023). Helical axial-flow multiphase pumps, as the core equipment for offshore oil and gas extraction, have the advantages of a simple and compact structure, excellent corrosion resistance (Zhang et al, 2020;Yang et al, 2024), and high efficiency in conveying multiphase fluids, even under high gas content.…”

Section: Introductionmentioning

confidence: 99%

Effect of the impeller blade outlet setting angle on the performance of the helical axial-flow multiphase pump

Wang,

Hu,

Bai

et al. 2024

Front. Energy Res.

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As one of the core pieces of equipment in the multiphase mixing system, the helical axial-flow multiphase pump plays a vital role in the process of offshore oil extraction. In order to explore the influence of the impeller blade outlet setting angle on the internal flow of the helical axial-flow multiphase pump, this paper increases the outlet setting angle of the flow surface by −3°, −1.5°, and 1.5°, respectively, based on the original multiphase pump. It calculates the flow characteristics of the impeller with four different outlet setting angles (including the original impeller) under the design condition with different inlet gas volume fractions (GVFs = 0, 10%, 30%, 50%, and 70%) by adopting the Euler–Euler non-homogeneous flow model and SST k-ω turbulence model. Furthermore, it compares its external characteristic curve and the internal pressure, velocity, gas distribution, and other rules of change of the impeller and guide vane under higher inlet GVF conditions (50%). The results show that in the pure water state, increasing the outlet setting angle appropriately can enhance both the pressure pressurization capability and efficiency of the helical axial-flow multiphase pump; the pressure pressurization capability and efficiency of each scheme decrease with an increase in inlet GVF, and at 50%–70% inlet GVF, the option of increasing the outlet setting angle by −1.5° is better; as the blade outlet setting angle decreases, the axial cross-sectional pressure after gas–liquid mixing increases, the overall velocity distribution is more uniform, and the vortex formed due to the counter-pressure flow in the secondary guide vane is reduced; the accumulation of gas phase on the backside of the impeller and guide vanes improves, leading to a reduction in flow losses.

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Empirical and numerical advancements in gas-liquid separation technology: A review

Cited by 8 publications

References 153 publications

Numerical and Experimental Analysis of Vortex Pump with Various Axial Clearances

Numerical and Experimental Analysis of Vortex Pump with Various Axial Clearances

Study on the Separation Performance of a Two Cylindrical Section Hydrocyclone under Various Height Ratios

Effect of the impeller blade outlet setting angle on the performance of the helical axial-flow multiphase pump

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