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Numerical Simulation of Gas–Liquid Two-Phase Flow Characteristics of Centrifugal Pump Based on the CFD–PBM

Author

Listed:
  • Fan Zhang

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

  • Lufeng Zhu

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

  • Ke Chen

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

  • Weicheng Yan

    (The School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Desmond Appiah

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

  • Bo Hu

    (Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China)

Abstract

This work seeks to apply the computational fluid dynamics–population balance model (CFD–PBM) to investigate the gas distribution and flow mechanism in the gas–liquid two-phase flow of a centrifugal pump. The findings show that the numerical simulation accurately captures the bubble distribution characteristics in the process of coalescence and breakage evolution. In addition, comparing the CFD–PBM with the Double Euler, the hydraulic head of the pump are similar, but the efficiency using the Double Euler is much higher—even close to single-phase. This is in contrast to previous experimental research. Then, the unsteady flow usually led to the formation of bubbles with larger diameters especially where vortices existed. In addition, the rotor–stator interaction was a main reason for bubble formation. Generally, it was observed that the coalescence rate was greater than the breakage rate; thus, the coalescence rate decreased until it equaled the breakage rate. Thereafter, the average diameter of the bubble in each part tended to be stable during the process of bubble evolution. Finally, the average diameter of bubbles seemed to increase from inlet to outlet. The results of this study may not only enhance the gas–liquid two-phase internal flow theory of centrifugal pumps, but also can serve as a benchmark for optimizations of reliable operation of hydraulic pumps under gas–liquid two-phase flow conditions.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jmathe:v:8:y:2020:i:5:p:769-:d:356757
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    References listed on IDEAS

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    1. Qiaorui Si & Haoyang Zhang & Gérard Bois & Jinfeng Zhang & Qianglei Cui & Shouqi Yuan, 2019. "Experimental Investigations on the Inner Flow Behavior of Centrifugal Pumps under Inlet Air-Water Two-Phase Conditions," Energies, MDPI, vol. 12(22), pages 1-14, November.
    2. 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.
    3. Li, Xiaojun & Chen, Bo & Luo, Xianwu & Zhu, Zuchao, 2020. "Effects of flow pattern on hydraulic performance and energy conversion characterisation in a centrifugal pump," Renewable Energy, Elsevier, vol. 151(C), pages 475-487.
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    Cited by:

    1. 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.

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