Repair Parameter Design of Outer Reinforcement Layers of Offshore Wind Turbine Blade Spar Cap Based on Structural and Aerodynamic Analysis

Hui Li (), Xiaolong Lu, Wen Xin, Zhihui Guo, Bo Zhou, Baokuan Ning and Hongbing Bao
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Hui Li: School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China
Xiaolong Lu: School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China
Wen Xin: School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China
Zhihui Guo: School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China
Bo Zhou: School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China
Baokuan Ning: School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China
Hongbing Bao: Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design, Wuxi 214174, China

Energies, 2023, vol. 16, issue 2, 1-24

Abstract: The influence of the outer reinforcement layers on the repair structure and aerodynamic performance was studied. Firstly, a continuous damage mechanics model was established, and the 3D Hashin criterion and cohesive zone material model were used to analyze the damage repair model. The failure load deviation was 5.5%. Secondly, on the basis of the γ − R e θ transition model and SST–ω turbulence model, the aerodynamic analysis model of DU300 airfoil was established. The numerical simulation results showed that the lift coefficient and pressure distribution at the angle of attack of 10° and 15° were deviated from the experimental values by 2%. Furthermore, 27 structural repair models, nine 2D aerodynamic repair models, and a 3D full-scale blade model were designed. It was found that, when the repair length accounted for 60% of the total model length, the failure load increased by 22%, but the aerodynamic power with the repair length of 10 m was decreased by 0.137%. When the repair area was large and the repair height was from 4 mm to 6 mm, the failure load was greatly increased by about 30%, and the aerodynamic pressure distribution and static pressure field fluctuated significantly. The results show that the structural and aerodynamic characteristics were closely related to the repair parameters.

Keywords: offshore wind turbine blades; spar cap damage; outer reinforcement layers; repair parameters; structural performance; aerodynamic characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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