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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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https://doi.org/10.5194/wes-2020-22
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2020-22
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  19 Feb 2020

19 Feb 2020

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A revised version of this preprint is currently under review for the journal WES.

Aero-elastic analysis of wind turbines under turbulent inflow conditions

Giorgia Guma, Galih Bangga, Thorsten Lutz, and Ewald Krämer Giorgia Guma et al.
  • Institute of Aerodynamics and Gas Dynamics, University of Stuttgart, Pfaffenwaldring 21, 70569 Stuttgart, Germany

Abstract. The aero-elastic response of the DANAERO wind turbine and interaction phenomena are investigated by the use of a high-fidelity model. A time-accurate unsteady fluid-structure interaction (FSI) coupling between a computational fluid dynamics (CFD) code for the aerodynamic response and a multi-body simulation (MBS) code for the structural response is used. Different CFD models of the same turbine with increasing complexity and technical details are coupled to the same MBS model in order to identify the impact of the different modeling approaches. The influence of the blade and tower flexibility and of the inflow turbulence is analyzed for a specific case of the DANAERO experiment. Lastly a fatigue analysis is performed from load signals in order to identify the most damaging load cycles and the fatigue ratio between the different models, showing that for low inflow velocities, a high turbulence has a major impact than the flexibility.

Giorgia Guma et al.

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Giorgia Guma et al.

Giorgia Guma et al.

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Short summary
With the increase of the installed wind capacity, the rotor diameter of the wind turbines is becoming larger and larger and therefore it is necessary to take aeroelasticity into consideration. At the same time, wind turbines are in reality subjected to atmospheric inflow leading to high wind instabilities and fluctuations. Within this work, a high-fidelity chain is used to analyze the effects of both by the use of models of the same turbine with increasing complexity and technical details.
With the increase of the installed wind capacity, the rotor diameter of the wind turbines is...
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