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Numerical study of turbulent flow past a rotating axial-flow pump based on a level-set immersed boundary method

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  • Kan, Kan
  • Yang, Zixuan
  • Lyu, Pin
  • Zheng, Yuan
  • Shen, Lian

Abstract

Large-eddy simulation is performed to study the turbulence statistics and flow structures of the water past a rotating axial-flow pump under different flow-rate working conditions. A novel sharp-interface level-set based immersed boundary method is applied to capture the complex geometry of the pump. An unstructured triangular mesh is used to discretize the complex surface geometry of the pump, and a ray-tracing method is employed to classify the computational domain into fluid and solid regions. Turbulence statistics, including the mean velocity, turbulent kinetic energy (TKE), turbulence production, and turbulence dissipation, are analyzed under five different flow-rate working conditions around the designed condition. The results show that unsteady wake, tip leakage flow, and flow separation are accompanied by a high TKE magnitude. For the high turbulence intensity under off-designed working conditions, the tip leakage flow plays a leading role at low flow-rates, and flow separation dominates at high flow-rates.

Suggested Citation

  • Kan, Kan & Yang, Zixuan & Lyu, Pin & Zheng, Yuan & Shen, Lian, 2021. "Numerical study of turbulent flow past a rotating axial-flow pump based on a level-set immersed boundary method," Renewable Energy, Elsevier, vol. 168(C), pages 960-971.
    • Handle: RePEc:eee:renene:v:168:y:2021:i:c:p:960-971
    DOI: 10.1016/j.renene.2020.12.103
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    References listed on IDEAS

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    Full references (including those not matched with items on IDEAS)

    Citations

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    Cited by:

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    2. Yu Chen & Jianxu Zhou & Bryan Karney & Qiang Guo & Jian Zhang, 2022. "Analytical Implementation and Prediction of Hydraulic Characteristics for a Francis Turbine Runner Operated at BEP," Sustainability, MDPI, vol. 14(4), pages 1-19, February.
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    4. Yifan Liu & Gang Lu & Junke Chen & Qigang Zhu, 2021. "Exploration of Internal and External Factors of Swimmers’ Performance Based on Biofluid Mechanics and Computer Simulation," IJERPH, MDPI, vol. 18(12), pages 1-18, June.
    5. Kan Kan & Qingying Zhang & Yuan Zheng & Hui Xu & Zhe Xu & Jianwei Zhai & Alexis Muhirwa, 2022. "Investigation into Influence of Wall Roughness on the Hydraulic Characteristics of an Axial Flow Pump as Turbine," Sustainability, MDPI, vol. 14(14), pages 1-20, July.
    6. Kan, Kan & Xu, Zhe & Chen, Huixiang & Xu, Hui & Zheng, Yuan & Zhou, Daqing & Muhirwa, Alexis & Maxime, Binama, 2022. "Energy loss mechanisms of transition from pump mode to turbine mode of an axial-flow pump under bidirectional conditions," Energy, Elsevier, vol. 257(C).
    7. Xu, Lianchen & Kan, Kan & Zheng, Yuan & Liu, Demin & Binama, Maxime & Xu, Zhe & Yan, Xiaotong & Guo, Mengqi & Chen, Huixiang, 2024. "Rotating stall mechanism of pump-turbine in hump region: An insight into vortex evolution," Energy, Elsevier, vol. 292(C).
    8. Li, Zhixiang & Xu, Hui & Feng, Jiangang & Chen, Huixiang & Kan, Kan & Li, Tianyi & Shen, Lian, 2024. "Fluctuation characteristics induced by energetic coherent structures in air-core vortex: The most complex vortex in the tidal power station intake system," Energy, Elsevier, vol. 288(C).
    9. Pu, Kexin & Huang, Bin & Miao, Hongjiang & Shi, Peili & Wu, Dazhuan, 2022. "Quantitative analysis of energy loss and vibration performance in a circulating axial pump," Energy, Elsevier, vol. 243(C).
    10. Zhao, Kunjie & Xu, Yanhe & Guo, Pengcheng & Qian, Zhongdong & Zhang, Yongchuan & Liu, Wei, 2022. "Multi-scale oscillation characteristics and stability analysis of pumped-storage unit under primary frequency regulation condition with low water head grid-connected," Renewable Energy, Elsevier, vol. 189(C), pages 1102-1119.
    11. Qigang Zhu & Yifan Liu & Ming Liu & Shuaishuai Zhang & Guangyang Chen & Hao Meng, 2021. "Intelligent Planning and Research on Urban Traffic Congestion," Future Internet, MDPI, vol. 13(11), pages 1-17, November.

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