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Comparative Study on Uni- and Bi-Directional Fluid Structure Coupling of Wind Turbine Blades

Author

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  • Mesfin Belayneh Ageze

    (School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, China
    Department of Mechanical Engineering, Woldia University, Woldia, Ethiopia)

  • Yefa Hu

    (School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, China)

  • Huachun Wu

    (School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, China)

Abstract

The current trends of wind turbine blade designs are geared towards a longer and slender blade with high flexibility, exhibiting complex aeroelastic loadings and instability issues, including flutter; in this regard, fluid-structure interaction (FSI) plays a significant role. The present article will conduct a comparative study between uni-directional and bi-directional fluid-structural coupling models for a horizontal axis wind turbine. A full-scale, geometric copy of the NREL 5MW blade with simplified material distribution is considered for simulation. Analytical formulations of the governing relations with appropriate approximation are highlighted, including turbulence model, i.e., Shear Stress Transport (SST) k- ω . These analytical relations are implemented using Multiphysics package ANSYS employing Fluent module (Computational Fluid Dynamics (CFD)-based solver) for the fluid domain and Transient Structural module (Finite Element Analysis-based solver) for the structural domain. ANSYS system coupling module also is configured to model the two fluid-structure coupling methods. The rated operational condition of the blade for a full cycle rotation is considered as a comparison domain. In the bi-directional coupling model, the structural deformation alters the angle of attack from the designed values, and by extension the flow pattern along the blade span; furthermore, the tip deflection keeps fluctuating whilst it tends to stabilize in the uni-directional coupling model.

Suggested Citation

  • Mesfin Belayneh Ageze & Yefa Hu & Huachun Wu, 2017. "Comparative Study on Uni- and Bi-Directional Fluid Structure Coupling of Wind Turbine Blades," Energies, MDPI, vol. 10(10), pages 1-21, September.
  • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1499-:d:113433
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    References listed on IDEAS

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    1. Tabassum-Abbasi, & Premalatha, M. & Abbasi, Tasneem & Abbasi, S.A., 2014. "Wind energy: Increasing deployment, rising environmental concerns," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 270-288.
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    Cited by:

    1. Mujahid Badshah & Saeed Badshah & Kushsairy Kadir, 2018. "Fluid Structure Interaction Modelling of Tidal Turbine Performance and Structural Loads in a Velocity Shear Environment," Energies, MDPI, vol. 11(7), pages 1-13, July.
    2. Kangqi Tian & Li Song & Yongyan Chen & Xiaofeng Jiao & Rui Feng & Rui Tian, 2022. "Stress Coupling Analysis and Failure Damage Evaluation of Wind Turbine Blades during Strong Winds," Energies, MDPI, vol. 15(4), pages 1-19, February.

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