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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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    1. Fan Yang & Hao-ru Zhao & Chao Liu, 2016. "Improvement of the Efficiency of the Axial-Flow Pump at Part Loads due to Installing Outlet Guide Vanes Mechanism," Mathematical Problems in Engineering, Hindawi, vol. 2016, pages 1-10, February.
    2. Han, Yadong & Tan, Lei, 2020. "Influence of rotating speed on tip leakage vortex in a mixed flow pump as turbine at pump mode," Renewable Energy, Elsevier, vol. 162(C), pages 144-150.
    3. Song, Xijie & Liu, Chao, 2020. "Experimental investigation of floor-attached vortex effects on the pressure pulsation at the bottom of the axial flow pump sump," Renewable Energy, Elsevier, vol. 145(C), pages 2327-2336.
    4. Han, Yadong & Tan, Lei, 2020. "Dynamic mode decomposition and reconstruction of tip leakage vortex in a mixed flow pump as turbine at pump mode," Renewable Energy, Elsevier, vol. 155(C), pages 725-734.
    5. Liu, Yabin & Han, Yadong & Tan, Lei & Wang, Yuming, 2020. "Blade rotation angle on energy performance and tip leakage vortex in a mixed flow pump as turbine at pump mode," Energy, Elsevier, vol. 206(C).
    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.
    3. Huixiang Chen & Kan Kan & Haolan Wang & Maxime Binama & Yuan Zheng & Hui Xu, 2021. "Development and Numerical Performance Analysis of a Micro Turbine in a Tap-Water Pipeline," Sustainability, MDPI, vol. 13(19), pages 1-18, September.
    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. 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).
    8. 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.
    9. 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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