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Numerical Investigation on Bubble Distribution of a Multistage Centrifugal Pump Based on a Population Balance Model

Author

Listed:
  • Sina Yan

    (State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China)

  • Shuaihui Sun

    (State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China)

  • Xingqi Luo

    (State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China)

  • Senlin Chen

    (State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China)

  • Chenhao Li

    (State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China)

  • Jianjun Feng

    (State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China)

Abstract

This work aimed to study the bubble distribution in a multiphase pump. A Euler-Euler inhomogeneous two-phase flow model coupled with a discrete particle population balance model (PBM) was used to simulate the whole flow channel of a three-stage gas-liquid two-phase centrifugal pump. Comparison of the computational fluid dynamic (CFD) simulation results with experimental data shows that the model can accurately predict the performance of the pump under various operating conditions. In addition, the liquid phase velocity distribution, gas-phase distribution, and pressure distribution of the second stage impeller at a 0.5 span of blade height under three typical working conditions were compared. Results show that the region with high local gas volume fraction (LGVF) mainly appears on the suction surface (SS) of the blade. With the increase in inlet gas volume fraction (IGVF), vortices and low velocity recirculation regions are generated at the impeller outlet and SS of the blade, the area with high LGVF increases, and gas–liquid separation occurs at the SS of the blade. The liquid phase flows out of the impeller at high velocity along the pressure surface of the blade, and the limited pressurization of fluid mainly happens at the impeller outlet. The average bubble size at the impeller outlet is the smallest while that at the impeller inlet is the largest. Under low IGVF conditions, bubbles tend to break into smaller ones, and the broken bubbles mainly concentrate at the blade pressure surface (PS) and the impeller outlet. Bubbles tend to coalesce into larger ones under high IGVF conditions. With the increase in IGVF, the bubble aggregation zone diffuses from the blade SS to the PS.

Suggested Citation

  • Sina Yan & Shuaihui Sun & Xingqi Luo & Senlin Chen & Chenhao Li & Jianjun Feng, 2020. "Numerical Investigation on Bubble Distribution of a Multistage Centrifugal Pump Based on a Population Balance Model," Energies, MDPI, vol. 13(4), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:4:p:908-:d:321913
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    References listed on IDEAS

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    1. Yun Xu & Shuliang Cao & Takeshi Sano & Tokiya Wakai & Martino Reclari, 2019. "Experimental Investigation on Transient Pressure Characteristics in a Helico-Axial Multiphase Pump," Energies, MDPI, vol. 12(3), pages 1-20, January.
    2. Qiaorui Si & Gérard Bois & Minquan Liao & Haoyang Zhang & Qianglei Cui & Shouqi Yuan, 2019. "A Comparative Study on Centrifugal Pump Designs and Two-Phase Flow Characteristic under Inlet Gas Entrainment Conditions," Energies, MDPI, vol. 13(1), pages 1-25, December.
    3. Qiaorui Si & Gérard Bois & Qifeng Jiang & Wenting He & Asad Ali & Shouqi Yuan, 2018. "Investigation on the Handling Ability of Centrifugal Pumps under Air–Water Two-Phase Inflow: Model and Experimental Validation," Energies, MDPI, vol. 11(11), pages 1-17, November.
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    Cited by:

    1. Boštjan Zajec & Leon Cizelj & Boštjan Končar, 2022. "Experimental Analysis of Flow Boiling in Horizontal Annulus—The Effect of Heat Flux on Bubble Size Distributions," Energies, MDPI, vol. 15(6), pages 1-12, March.
    2. Hang, Jianwei & Bai, Ling & Zhou, Ling & Jiang, Lei & Shi, Weidong & Agarwal, Ramesh, 2022. "Inter-stage energy characteristics of electrical submersible pump under gassy conditions," Energy, Elsevier, vol. 256(C).
    3. Shuaihui Sun & Pei Ren & Pengcheng Guo & Longgang Sun & Xiaobo Zheng, 2022. "Influence of the Gas Model on the Performance and Flow Field Prediction of a Gas–Liquid Two-Phase Hydraulic Turbine," Energies, MDPI, vol. 15(17), pages 1-18, August.
    4. Michalis Mentzos & Ioannis Kassanos & Ioannis Anagnostopoulos & Andronikos Filios, 2024. "The Effect of Blade Angle Distribution on the Flow Field of a Centrifugal Impeller in Liquid-Gas Flow," Energies, MDPI, vol. 17(16), pages 1-22, August.
    5. Fan Zhang & Lufeng Zhu & Ke Chen & Weicheng Yan & Desmond Appiah & Bo Hu, 2020. "Numerical Simulation of Gas–Liquid Two-Phase Flow Characteristics of Centrifugal Pump Based on the CFD–PBM," Mathematics, MDPI, vol. 8(5), pages 1-19, May.

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