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A new optimization approach to improve the overall performance of thick wind turbine airfoils

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  • Li, Xingxing
  • Yang, Ke
  • Bai, Jingyan
  • Xu, Jianzhong

Abstract

A crucial problem of designing thick airfoils is balancing structural and aerodynamic requirements. This paper documented a new idea to deal with the thick airfoil's design. Firstly, the relative thickness of the original airfoil was increased to enhance its structural property. Then the overall aerodynamic performance was improved by the optimization design method. Specifically, this paper put forward a mathematical model of the overall optimization employing airfoil's performance evaluation indicators which represent modern rotor blades' aerodynamic requirements of “high efficiency, low extreme load, wide range of operating angle of attack and stability with varying operating conditions”. Based on this model, an integrated optimization platform for thick airfoils' overall design was established. Through an optimization experiment, a new 35-percent relative thickness airfoil was obtained. The new airfoil was predicted with high design lift coefficient, acceptable maximum lift to drag ratio, moderate stall parameter, and desirable stability parameters. These characteristics contribute to a high overall performance which could be competent with commonly used thick DU airfoils. Lift characteristics of the new airfoil have been validated by tests. These results confirmed the proposed method has effectively balanced airfoil's complicated requirements and successfully improved the new airfoil's overall performance.

Suggested Citation

  • Li, Xingxing & Yang, Ke & Bai, Jingyan & Xu, Jianzhong, 2016. "A new optimization approach to improve the overall performance of thick wind turbine airfoils," Energy, Elsevier, vol. 116(P1), pages 202-213.
    • Handle: RePEc:eee:energy:v:116:y:2016:i:p1:p:202-213
    DOI: 10.1016/j.energy.2016.09.108
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    References listed on IDEAS

    as
    1. Peter J. Schubel & Richard J. Crossley, 2012. "Wind Turbine Blade Design," Energies, MDPI, vol. 5(9), pages 1-25, September.
    2. Abdallah, I. & Natarajan, A. & Sørensen, J.D., 2015. "Impact of uncertainty in airfoil characteristics on wind turbine extreme loads," Renewable Energy, Elsevier, vol. 75(C), pages 283-300.
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    Cited by:

    1. Zhou, Teng & Cao, Huijing & Zhang, Mingming & Liao, Caicai, 2022. "Performance simulation of wind turbine with optimal designed trailing-edge serrations," Energy, Elsevier, vol. 243(C).
    2. Ma, Ning & Lei, Hang & Han, Zhaolong & Zhou, Dai & Bao, Yan & Zhang, Kai & Zhou, Lei & Chen, Caiyong, 2018. "Airfoil optimization to improve power performance of a high-solidity vertical axis wind turbine at a moderate tip speed ratio," Energy, Elsevier, vol. 150(C), pages 236-252.
    3. Vianna Neto, Júlio Xavier & Guerra Junior, Elci José & Moreno, Sinvaldo Rodrigues & Hultmann Ayala, Helon Vicente & Mariani, Viviana Cocco & Coelho, Leandro dos Santos, 2018. "Wind turbine blade geometry design based on multi-objective optimization using metaheuristics," Energy, Elsevier, vol. 162(C), pages 645-658.

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