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Large-eddy simulation of a hydrokinetic turbine mounted on an erodible bed

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  • Yang, Xiaolei
  • Khosronejad, Ali
  • Sotiropoulos, Fotis

Abstract

Marine and hydrokinetic (MHK) energy from free-flowing waves, tides and currents comprises an important source of clean and renewable energy. The development of technologies for harnessing MHK energy and assessing its environmental effects is still at early stage. In this work, we develop a computational model for simulating hydrokinetic turbines with bed-load sediment transport under clear-water scour conditions. Turbulent flow is simulated using large-eddy simulation (LES). The bed surface elevation is simulated by solving the non-equilibrium continuity equation, the so-called Exner-Polya equation. The turbine blades are parameterized as actuator lines. The developed model is applied to simulate the flow past an axial-flow hydrokinetic turbine mounted on an erodible bed in an open channel. A good agreement with measurements is obtained. The effects of turbine operating conditions and sediment particle sizes on the bed-load sediment transport are then examined. Finally the turbine wake characteristics are investigated for a rigid flat bed and the eroded bed under different turbine operating conditions.

Suggested Citation

  • Yang, Xiaolei & Khosronejad, Ali & Sotiropoulos, Fotis, 2017. "Large-eddy simulation of a hydrokinetic turbine mounted on an erodible bed," Renewable Energy, Elsevier, vol. 113(C), pages 1419-1433.
    • Handle: RePEc:eee:renene:v:113:y:2017:i:c:p:1419-1433
    DOI: 10.1016/j.renene.2017.07.007
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    References listed on IDEAS

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    1. Sun, X. & Chick, J.P. & Bryden, I.G., 2008. "Laboratory-scale simulation of energy extraction from tidal currents," Renewable Energy, Elsevier, vol. 33(6), pages 1267-1274.
    2. Hill, Craig & Musa, Mirko & Guala, Michele, 2016. "Interaction between instream axial flow hydrokinetic turbines and uni-directional flow bedforms," Renewable Energy, Elsevier, vol. 86(C), pages 409-421.
    3. Pinon, Grégory & Mycek, Paul & Germain, Grégory & Rivoalen, Elie, 2012. "Numerical simulation of the wake of marine current turbines with a particle method," Renewable Energy, Elsevier, vol. 46(C), pages 111-126.
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    Citations

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    Cited by:

    1. Xiaolei Yang & Fotis Sotiropoulos, 2019. "A Review on the Meandering of Wind Turbine Wakes," Energies, MDPI, vol. 12(24), pages 1-20, December.
    2. Xiaohao Liu & Zhaobin Li & Xiaolei Yang & Duo Xu & Seokkoo Kang & Ali Khosronejad, 2022. "Large-Eddy Simulation of Wakes of Waked Wind Turbines," Energies, MDPI, vol. 15(8), pages 1-26, April.
    3. Musa, Mirko & Hill, Craig & Guala, Michele, 2019. "Interaction between hydrokinetic turbine wakes and sediment dynamics: array performance and geomorphic effects under different siting strategies and sediment transport conditions," Renewable Energy, Elsevier, vol. 138(C), pages 738-753.
    4. Yang, Xiaolei & Pakula, Maggie & Sotiropoulos, Fotis, 2018. "Large-eddy simulation of a utility-scale wind farm in complex terrain," Applied Energy, Elsevier, vol. 229(C), pages 767-777.
    5. Clemente Gotelli & Mirko Musa & Michele Guala & Cristián Escauriaza, 2019. "Experimental and Numerical Investigation of Wake Interactions of Marine Hydrokinetic Turbines," Energies, MDPI, vol. 12(16), pages 1-17, August.
    6. David Menéndez Arán & Ángel Menéndez, 2021. "Surrogate-Based Optimization of Horizontal Axis Hydrokinetic Turbine Rotor Blades," Energies, MDPI, vol. 14(13), pages 1-16, July.
    7. Wu, Chutian & Yang, Xiaolei & Zhu, Yaxin, 2021. "On the design of potential turbine positions for physics-informed optimization of wind farm layout," Renewable Energy, Elsevier, vol. 164(C), pages 1108-1120.

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