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Insight into Rotational Effects on a Wind Turbine Blade Using Navier–Stokes Computations

Author

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  • Iván Herráez

    (Forwind, University of Oldenburg, D-26111 Oldenburg, Germany)

  • Bernhard Stoevesandt

    (Fraunhofer Institute for Wind Energy and Energy System Technology, Ammerländer Heerstr. 136, D-26129 Oldenburg, Germany)

  • Joachim Peinke

    (Forwind, University of Oldenburg, D-26111 Oldenburg, Germany)

Abstract

Rotational effects are known to influence severely the aerodynamic performance of the inboard region of rotor blades. The underlying physical mechanisms are however far from being well understood. The present work addresses this problem using Reynolds averaged Navier–Stokes computations and experimental results of the MEXICO (Model Experiments in Controlled Conditions) rotor. Four axisymmetric inflow cases with wind speeds ranging from pre-stall to post-stall conditions are computed and compared with pressure and particle image velocimetry (PIV) experimental data, obtaining, in general, consistent results. At low angles of attack, the aerodynamic behavior of all of the studied blade sections resembles the one from the corresponding 2D airfoils. However, at high angles of attack, rotational effects lead to stall delay and/or lift enhancement at inboard positions. Such effects are shown to occur only in the presence of significant radial flows. Interestingly, the way in which rotational effects influence the aerodynamics of the MEXICO blades differs qualitatively in certain aspects from the descriptions found in the literature about this topic. The presented results provide new insights that are useful for the development of advanced and physically-sound correction models.

Suggested Citation

  • Iván Herráez & Bernhard Stoevesandt & Joachim Peinke, 2014. "Insight into Rotational Effects on a Wind Turbine Blade Using Navier–Stokes Computations," Energies, MDPI, vol. 7(10), pages 1-25, October.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:10:p:6798-6822:d:41416
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    References listed on IDEAS

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    1. Du, Zhaohui & Selig, M.S, 2000. "The effect of rotation on the boundary layer of a wind turbine blade," Renewable Energy, Elsevier, vol. 20(2), pages 167-181.
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    3. J. G. Schepers & S. J. Schreck, 2019. "Aerodynamic measurements on wind turbines," Wiley Interdisciplinary Reviews: Energy and Environment, Wiley Blackwell, vol. 8(1), January.
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    9. Müller-Vahl, Hanns Friedrich & Nayeri, Christian Navid & Paschereit, Christian Oliver & Greenblatt, David, 2016. "Dynamic stall control via adaptive blowing," Renewable Energy, Elsevier, vol. 97(C), pages 47-64.
    10. Matthias Schramm & Hamid Rahimi & Bernhard Stoevesandt & Kim Tangager, 2017. "The Influence of Eroded Blades on Wind Turbine Performance Using Numerical Simulations," Energies, MDPI, vol. 10(9), pages 1-15, September.
    11. Dose, B. & Rahimi, H. & Herráez, I. & Stoevesandt, B. & Peinke, J., 2018. "Fluid-structure coupled computations of the NREL 5 MW wind turbine by means of CFD," Renewable Energy, Elsevier, vol. 129(PA), pages 591-605.
    12. Shantanu Purohit & Ijaz Fazil Syed Ahmed Kabir & E. Y. K. Ng, 2021. "On the Accuracy of uRANS and LES-Based CFD Modeling Approaches for Rotor and Wake Aerodynamics of the (New) MEXICO Wind Turbine Rotor Phase-III," Energies, MDPI, vol. 14(16), pages 1-26, August.
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