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Large eddy simulation of an H-Darrieus rotor

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  • Patil, Rohit
  • Daróczy, László
  • Janiga, Gábor
  • Thévenin, Dominique

Abstract

This study primarily aims to examine the flow field around an H-Darrieus wind turbine using Large Eddy Simulation (LES). The corresponding experimental data for the validation is provided by TU Delft. As in the experiments, the turbine operates at a tip speed ratio (TSR) of 2 and a chord-based Reynolds number (Re) of 8·104. A dedicated block-structured mesh has been generated to perform 3D LES simulation by using the WALE subgrid model. The low TSR results in a high angle of attack and causes the turbine to experience dynamic stall, leading to particularly challenging aerodynamic conditions. Normal and tangential forces obtained by LES are compared with experimental results, leading overall to a good agreement. The quality of the LES computation is further confirmed by analyzing turbulent spectra at several locations in the simulations. Finally, vortex shedding from a single turbine blade is studied, revealing that six distinct leading-edge and trailing-edge vortex pairs form and detach during one rotation.

Suggested Citation

  • Patil, Rohit & Daróczy, László & Janiga, Gábor & Thévenin, Dominique, 2018. "Large eddy simulation of an H-Darrieus rotor," Energy, Elsevier, vol. 160(C), pages 388-398.
    • Handle: RePEc:eee:energy:v:160:y:2018:i:c:p:388-398
    DOI: 10.1016/j.energy.2018.06.203
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    References listed on IDEAS

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    1. Eriksson, Sandra & Bernhoff, Hans & Leijon, Mats, 2008. "Evaluation of different turbine concepts for wind power," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(5), pages 1419-1434, June.
    2. Daróczy, László & Janiga, Gábor & Thévenin, Dominique, 2016. "Analysis of the performance of a H-Darrieus rotor under uncertainty using Polynomial Chaos Expansion," Energy, Elsevier, vol. 113(C), pages 399-412.
    3. Li, Chao & Zhu, Songye & Xu, You-lin & Xiao, Yiqing, 2013. "2.5D large eddy simulation of vertical axis wind turbine in consideration of high angle of attack flow," Renewable Energy, Elsevier, vol. 51(C), pages 317-330.
    4. Daróczy, László & Janiga, Gábor & Petrasch, Klaus & Webner, Michael & Thévenin, Dominique, 2015. "Comparative analysis of turbulence models for the aerodynamic simulation of H-Darrieus rotors," Energy, Elsevier, vol. 90(P1), pages 680-690.
    5. Peng, H.Y. & Lam, H.F., 2016. "Turbulence effects on the wake characteristics and aerodynamic performance of a straight-bladed vertical axis wind turbine by wind tunnel tests and large eddy simulations," Energy, Elsevier, vol. 109(C), pages 557-568.
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    Cited by:

    1. Kerikous, Emeel & Thévenin, Dominique, 2019. "Optimal shape and position of a thick deflector plate in front of a hydraulic Savonius turbine," Energy, Elsevier, vol. 189(C).
    2. Sajid Ali & Choon-Man Jang, 2021. "Effects of Tip Speed Ratios on the Blade Forces of a Small H-Darrieus Wind Turbine," Energies, MDPI, vol. 14(13), pages 1-18, July.
    3. Francesco Balduzzi & Marco Zini & Andreu Carbó Molina & Gianni Bartoli & Tim De Troyer & Mark C. Runacres & Giovanni Ferrara & Alessandro Bianchini, 2020. "Understanding the Aerodynamic Behavior and Energy Conversion Capability of Small Darrieus Vertical Axis Wind Turbines in Turbulent Flows," Energies, MDPI, vol. 13(11), pages 1-15, June.
    4. Mohamed, M.H., 2019. "Criticism study of J-Shaped darrieus wind turbine: Performance evaluation and noise generation assessment," Energy, Elsevier, vol. 177(C), pages 367-385.
    5. Rezaeiha, Abdolrahim & Montazeri, Hamid & Blocken, Bert, 2018. "Towards optimal aerodynamic design of vertical axis wind turbines: Impact of solidity and number of blades," Energy, Elsevier, vol. 165(PB), pages 1129-1148.
    6. Tian, Wenlong & Ni, Xiwen & Li, Bo & Yang, Guangyong & Mao, Zhaoyong, 2023. "Improving the efficiency of Darrieus turbines through a gear-like turbine layout," Energy, Elsevier, vol. 267(C).

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    Keywords

    Wind energy; Darrieus; CFD; H-rotor; LES;
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