Suppressing Vortex Induced Vibrations of Wind Turbine Blades with Flaps

  • Sergio González HorcasEmail author
  • Mads Holst Aagaard Madsen
  • Niels Nørmark Sørensen
  • Frederik Zahle
Part of the Springer Tracts in Mechanical Engineering book series (STME)


The present work describes an exploratory work aiming to analyze the impact of trailing edge flaps activation on Vortex Induced Vibrations (VIV) suppression. A computational study of the VIV of the AVATAR rotor blade, a 10 MW design suitable for offshore locations, was performed. A Fluid Structure Interaction (FSI) approach was adopted for the simulations, coupling an Improved Delayed Detached Eddy Simulations (IDDES) flow solver with a beam-based structural model. Initial simulations based on the clean geometry identified significant edgewise VIV for certain free stream velocity and flow inclination angles. Inflow conditions showing the maximum amplitude of blade vibrations were used in order to test several trailing edge flap geometries and operating angles. The best flap configuration found in this parametric study managed to suppress the VIV phenomenon. However, when assessing a wider range of inflow conditions, the amplitudes of vibration of the blade equipped with flaps were found to be equivalent to the ones obtained for its clean counterpart. It is therefore concluded that a re-calibration of the flap operating angle should be required in order to adapt it to the considered wind speed and wind direction.


AVATAR Computational fluid dynamics Flaps Fluid structure interaction Vortex induced vibrations Wind energy 


  1. 1.
    Heinz JC, Sørensen NN, Zahle F, Skrypinski W (2016) Vortex-induced vibrations on a modern wind turbine blade. Wind Energy 19(11):2041–2051CrossRefGoogle Scholar
  2. 2.
    Barlas T, Jost E, Pirrung G, Tsiantas T, Riziotis V, Navalkar ST, Lutz T, Van Wingerden JW (2016) Benchmarking aerodynamic prediction of unsteady rotor aerodynamics of active flaps on wind turbine blades using ranging fidelity tools. J Phys: Conf Ser 753(2)Google Scholar
  3. 3.
    Jost E, Fischer A, Lutz T, Krämer E (2016) An investigation of unsteady 3D effects on trailing edge flaps. J Phys: Conf Ser 753(2)Google Scholar
  4. 4.
    Lekou D, Chortis D, Chaviaropoulos P, Munduate X, Irisarri A, Madsen HA, Yde K, Thomsen K, Stettner M, Reijerkerk M, Grasso F, Savenije R, Schepers G, Andersen C (2015) AVATAR Deliverable D1.2: reference blade design. Technical report, ECN Wind energy, Petten, The NetherlandsGoogle Scholar
  5. 5.
    Michelsen JA (1992) Basis3D - A platform for development of multiblock PDE solvers. Technical report AFM 92-05, Department of Fluid Mechanics, Technical University of DenmarkGoogle Scholar
  6. 6.
    Michelsen JA (1994) Block structured multigrid solution of 2D and 3D elliptic PDE’s. Technical report AFM 94-06, Department of Fluid Mechanics, Technical University of DenmarkGoogle Scholar
  7. 7.
    Sørensen NN (1995) General purpose flow solver applied to flow over hills. Risø-R- 827-(EN), Risø National Laboratory, Roskilde, DenmarkGoogle Scholar
  8. 8.
    Menter FR, Kuntz M (2004) Adaptation of eddy-viscosity turbulence models to unsteady separated flow behind vehicles. In: McCallen R, Browand F, Ross J (eds) The aerodynamics of heavy vehicles: trucks, buses, and trains. Springer, Berlin, pp 339–352CrossRefGoogle Scholar
  9. 9.
    Menter FR (1994) Two-equation eddy-viscosity turbulence models for engineering applications. AIAA J 32(8):1598–1605CrossRefGoogle Scholar
  10. 10.
    Larsen TJ, Hansen AM (2015) HAWC2, the user’s manual. Technical report July, RisøGoogle Scholar
  11. 11.
    Heinz JC, Sørensen NN, Riziotis V, Schwarz M, Gomez-iradi S, Stettner M (2016) Aerodynamics of large rotors. WP4. Deliverable 4.5. Technical report, ECN Wind Energy, Petten, The NetherlandsGoogle Scholar
  12. 12.
    Hoang MC, Laneville A, Légeron F (2015) Experimental study on aerodynamic coefficients of yawed cylinders. J Fluids Struct 54:597–611CrossRefGoogle Scholar
  13. 13.
    Welch P (1967) The use of the fast Fourier transform for the estimation of power spectra: a method based on time averaging over short, modified periodograms. IEEE Trans Audio Electroacoust 15:70–73CrossRefGoogle Scholar
  14. 14.
    Matsumoto M, Yagi T, Shigemura Y, Tsushima D (2001) Vortex-induced cable vibration of cable-stayed bridges at high reduced wind velocity. J Wind Eng Ind Aerodyn 89(7–8):633–647CrossRefGoogle Scholar
  15. 15.
    Yeo D, Jones NP (2010) Aerodynamic effects of strake patterns on flow around a yawed circular cylinder. In: The fifth international symposium on computational wind engineering (CWE2010), Chapel Hill, North Carolina, USAGoogle Scholar
  16. 16.
    Gioria RS, Korkischko I, Meneghini JR (2011) Simulation of flow around a circular cylinder fitted with strakes. In: 21st International congress of mechanical engineeringGoogle Scholar
  17. 17.
    Zhou T, Razali SF, Hao Z, Cheng L (2011) On the study of vortex-induced vibration of a cylinder with helical strakes. J Fluids Struct 27(7):903–917CrossRefGoogle Scholar
  18. 18.
    Sederberg TW, Parry SR (1986) Free-form deformation of solid geometric models. ACM SIGGRAPH Comput Graph 20(4):151–160CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Sergio González Horcas
    • 1
    Email author
  • Mads Holst Aagaard Madsen
    • 1
  • Niels Nørmark Sørensen
    • 1
  • Frederik Zahle
    • 1
  1. 1.DTU Wind EnergyRoskildeDenmark

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