Effect of shallow-angled skins on the structural performance of the large-scale wind turbine blade
- Authors
- Ha, Sung Kyu; Hayat, Khazar; Xu, Lei
- Issue Date
- Nov-2014
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Cost of energy; Large-scale wind turbine blade; Shallow-angled skin
- Citation
- Renewable Energy, v.71, pp.100 - 112
- Indexed
- SCIE
SCOPUS
- Journal Title
- Renewable Energy
- Volume
- 71
- Start Page
- 100
- End Page
- 112
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/25742
- DOI
- 10.1016/j.renene.2014.05.023
- ISSN
- 0960-1481
- 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. © 2014 Elsevier Ltd. All rights reserved.
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