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Effect of shallow-angled skins on the structural performance of the large-scale wind turbine blade

Author

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  • Ha, Sung Kyu
  • Hayat, Khazar
  • Xu, Lei

Abstract

Two shallow-angled symmetric and asymmetric skins, with off-axis fiber angles of less than 45°, were proposed and employed to a 5 MW wind turbine blade. For the symmetric configuration, shallow-angled skins were applied to both the pressure and suction sides of the blade, while, for the asymmetric configuration, only the pressure side was implemented with a shallow-angled skin, keeping the conventional 45-degree-angled skin for the suction side. The blade tip deflection, modal frequencies, buckling stability, and failure index were computed for off-axis fiber angles of 45°, 35°, and 25°. The use of shallow-angled skins improved blade bending stiffness and strength. The buckling resistance decreased for symmetric skins and remained unchanged for asymmetric skins; the former case was compensated for by increasing the core thickness. For both skin configurations, a reduction in the blade failure index of up to 18% and 38%, and mass reductions of up to 8% and 13% were demonstrated for the 35° and 25° shallow-angled skins, respectively.

Suggested Citation

  • Ha, Sung Kyu & Hayat, Khazar & Xu, Lei, 2014. "Effect of shallow-angled skins on the structural performance of the large-scale wind turbine blade," Renewable Energy, Elsevier, vol. 71(C), pages 100-112.
    • Handle: RePEc:eee:renene:v:71:y:2014:i:c:p:100-112
    DOI: 10.1016/j.renene.2014.05.023
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    Cited by:

    1. Meng, Hang & Jin, Danyang & Li, Li & Liu, Yongqian, 2022. "Analytical and numerical study on centrifugal stiffening effect for large rotating wind turbine blade based on NREL 5 MW and WindPACT 1.5 MW models," Renewable Energy, Elsevier, vol. 183(C), pages 321-329.

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