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Constraints of Parametrically Defined Guide Vanes for a High-Head Francis Turbine

Author

Listed:
  • Filip Stojkovski

    (Faculty of Mechanical Engineering, Ss. Cyril and Methodius University in Skopje, 1000 Skopje, North Macedonia)

  • Marija Lazarevikj

    (Faculty of Mechanical Engineering, Ss. Cyril and Methodius University in Skopje, 1000 Skopje, North Macedonia)

  • Zoran Markov

    (Faculty of Mechanical Engineering, Ss. Cyril and Methodius University in Skopje, 1000 Skopje, North Macedonia)

  • Igor Iliev

    (Waterpower Laboratory, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), Alfred Getz’ Vei 4, 7034 Trondheim, Norway)

  • Ole Gunnar Dahlhaug

    (Waterpower Laboratory, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), Alfred Getz’ Vei 4, 7034 Trondheim, Norway)

Abstract

This paper is focused on the guide vane cascade as one of the most crucial stationary sub-systems of the hydraulic turbine, which needs to provide efficient inflow hydraulic conditions to the runner. The guide vanes direct the flow from the spiral casing and the stay vanes towards the runner, regulating the desired discharge. A parametric design tool with normalized geometrical constraints was created in MATLAB, suitable for generating guide vane cascade geometries for Francis turbines. The goal is to determine the limits of these constraints, which will lead to future faster prediction of initial guide vane configurations in the turbine optimal operating region. Several geometries are developed using preliminary design data of the turbine and are investigated using CFD simulations close to the best efficiency point (BEP) of the turbine. This research is part of the Horizon-2020—HydroFlex project led by the Norwegian University of Science and Technology (NTNU), focusing on the development of a flexible hydropower generation.

Suggested Citation

  • Filip Stojkovski & Marija Lazarevikj & Zoran Markov & Igor Iliev & Ole Gunnar Dahlhaug, 2021. "Constraints of Parametrically Defined Guide Vanes for a High-Head Francis Turbine," Energies, MDPI, vol. 14(9), pages 1-13, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:9:p:2667-:d:549689
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    References listed on IDEAS

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    1. Iliev, Igor & Trivedi, Chirag & Dahlhaug, Ole Gunnar, 2019. "Variable-speed operation of Francis turbines: A review of the perspectives and challenges," Renewable and Sustainable Energy Reviews, Elsevier, vol. 103(C), pages 109-121.
    2. Ravi Koirala & Baoshan Zhu & Hari Prasad Neopane, 2016. "Effect of Guide Vane Clearance Gap on Francis Turbine Performance," Energies, MDPI, vol. 9(4), pages 1-14, April.
    3. Trivedi, Chirag & Iliev, Igor & Dahlhaug, Ole Gunnar & Markov, Zoran & Engstrom, Fredrik & Lysaker, Henning, 2020. "Investigation of a Francis turbine during speed variation: Inception of cavitation," Renewable Energy, Elsevier, vol. 166(C), pages 147-162.
    4. Thapa, Biraj Singh & Dahlhaug, Ole Gunnar & Thapa, Bhola, 2018. "Flow measurements around guide vanes of Francis turbine: A PIV approach," Renewable Energy, Elsevier, vol. 126(C), pages 177-188.
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    Cited by:

    1. Lu, Zhaoheng & Tao, Ran & Yao, Zhifeng & Liu, Weichao & Xiao, Ruofu, 2022. "Effects of guide vane shape on the performances of pump-turbine: A comparative study in energy storage and power generation," Renewable Energy, Elsevier, vol. 197(C), pages 268-287.

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