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Numerical Study of Sediment Erosion Analysis in Francis Turbine

Author

Listed:
  • Md Rakibuzzaman

    (Graduate School, Department of Mechanical Engineering, Soongsil University, Seoul 06978, Korea)

  • Hyoung-Ho Kim

    (Graduate School, Department of Mechanical Engineering, Soongsil University, Seoul 06978, Korea)

  • Kyungwuk Kim

    (Graduate School, Department of Mechanical Engineering, Soongsil University, Seoul 06978, Korea)

  • Sang-Ho Suh

    (Graduate School, Department of Mechanical Engineering, Soongsil University, Seoul 06978, Korea)

  • Kyung Yup Kim

    (Department of Mechanical Engineering, Korea Polytechnic University, Gyeonggi-Do 15073, Korea)

Abstract

Effective hydraulic turbine design prevents sediment and cavitation erosion from impacting the performance and reliability of the machine. Using computational fluid dynamics (CFD) techniques, this study investigated the performance characteristics of sediment and cavitation erosion on a hydraulic Francis turbine by ANSYS-CFX software. For the erosion rate calculation, the particle trajectory Tabakoff–Grant erosion model was used. To predict the cavitation characteristics, the study’s source term for interphase mass transfer was the Rayleigh–Plesset cavitation model. The experimental data acquired by this study were used to validate the existing evaluations of the Francis turbine. Hydraulic results revealed that the maximum difference was only 0.958% compared with the CFD data, and 0.547% compared with the experiment (Korea Institute of Machinery and Materials (KIMM)). The turbine blade region was affected by the erosion rate at the trailing edge because of their high velocity. Furthermore, in the cavitation–erosion simulation, it was observed that abrasion propagation began from the pressure side of the leading edge and continued along to the trailing edge of the runner. Additionally, as sediment flow rates grew within the area of the attached cavitation, they increased from the trailing edge at the suction side, and efficiency was reduced. Cavitation–sand erosion results then revealed a higher erosion rate than of those of the sand erosion condition.

Suggested Citation

  • Md Rakibuzzaman & Hyoung-Ho Kim & Kyungwuk Kim & Sang-Ho Suh & Kyung Yup Kim, 2019. "Numerical Study of Sediment Erosion Analysis in Francis Turbine," Sustainability, MDPI, vol. 11(5), pages 1-18, March.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:5:p:1423-:d:211868
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    References listed on IDEAS

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    1. Padhy, Mamata Kumari & Saini, R.P., 2008. "A review on silt erosion in hydro turbines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(7), pages 1974-1987, September.
    2. Thapa, Biraj Singh & Dahlhaug, Ole Gunnar & Thapa, Bhola, 2015. "Sediment erosion in hydro turbines and its effect on the flow around guide vanes of Francis turbine," Renewable and Sustainable Energy Reviews, Elsevier, vol. 49(C), pages 1100-1113.
    3. Jingwen Tang & Liyuan Chai & Huan Li & Zhihui Yang & Weichun Yang, 2018. "A 10-Year Statistical Analysis of Heavy Metals in River and Sediment in Hengyang Segment, Xiangjiang River Basin, China," Sustainability, MDPI, vol. 10(4), pages 1-28, April.
    4. Hyoung-Ho Kim & Md Rakibuzzaman & Kyungwuk Kim & Sang-Ho Suh, 2019. "Flow and Fast Fourier Transform Analyses for Tip Clearance Effect in an Operating Kaplan Turbine," Energies, MDPI, vol. 12(2), pages 1-15, January.
    5. Choi, Hyen-Jun & Zullah, Mohammed Asid & Roh, Hyoung-Woon & Ha, Pil-Su & Oh, Sueg-Young & Lee, Young-Ho, 2013. "CFD validation of performance improvement of a 500 kW Francis turbine," Renewable Energy, Elsevier, vol. 54(C), pages 111-123.
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    Cited by:

    1. Aleksandr Zharkovskii & Dmitry Svoboda & Igor Borshchev & Arsentiy Klyuyev & Evgeniy Ivanov & Sergey Shutsky, 2023. "Axial-Flow Pump with Enhanced Cavitation Erosion Resistance," Energies, MDPI, vol. 16(3), pages 1-13, January.

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