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Influence of leading-edge tubercles on the aerodynamic performance of a horizontal-axis wind turbine: A numerical study

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  • Ke, Wenliang
  • Hashem, Islam
  • Zhang, Wenwu
  • Zhu, Baoshan

Abstract

Leading-edge tubercles on the humpback whale pectoral fin are known to have aerodynamic benefits, particularly in the post-stall regime. In this research, a horizontal-axis wind turbine blade was modelled with tubercles distributed on its leading edge to mimic the humpback whale pectoral fin. A parametric study of the effect of tubercles on the reference NREL Phase VI wind turbine was conducted via computational fluid dynamics. Three parameters—amplitude, wavelength, and tubercle location along the blade span—were varied. The results showed that tubercles have negative effects on the turbine performance at wind speeds (V∞) ≤ 7 m/s. However, when tubercles are placed over 60% of the blade span, the backflow area can be eliminated at V∞ = 10 m/s. It is found that the vortices in the stable-flow zone over the suction surface can be reduced when tubercles of a relatively small amplitude-wavelength ratio are employed, thereby maintaining turbine performance. Compared with the reference blade, tubercles provided benefits at higher wind speeds. The generated vortices due to the presence of tubercles, leading to both blockage effects and stall delay. The results revealed that the pressure on the suction surface of the tubercled blade decreases, thereby increasing lift and enhancing the turbine performance.

Suggested Citation

  • Ke, Wenliang & Hashem, Islam & Zhang, Wenwu & Zhu, Baoshan, 2022. "Influence of leading-edge tubercles on the aerodynamic performance of a horizontal-axis wind turbine: A numerical study," Energy, Elsevier, vol. 239(PB).
    • Handle: RePEc:eee:energy:v:239:y:2022:i:pb:s0360544221024348
    DOI: 10.1016/j.energy.2021.122186
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    References listed on IDEAS

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    1. Lee, Kyoungsoo & Huque, Ziaul & Kommalapati, Raghava & Han, Sang-Eul, 2017. "Fluid-structure interaction analysis of NREL phase VI wind turbine: Aerodynamic force evaluation and structural analysis using FSI analysis," Renewable Energy, Elsevier, vol. 113(C), pages 512-531.
    2. Hashem, I. & Mohamed, M.H. & Hafiz, A.A., 2017. "Aero-acoustics noise assessment for Wind-Lens turbine," Energy, Elsevier, vol. 118(C), pages 345-368.
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    Cited by:

    1. Wang, Longjun & Alam, Md. Mahbub & Rehman, Shafiqur & Zhou, Yu, 2022. "Effects of blowing and suction jets on the aerodynamic performance of wind turbine airfoil," Renewable Energy, Elsevier, vol. 196(C), pages 52-64.
    2. Zhang, Zhihao & Kuang, Limin & Han, Zhaolong & Zhou, Dai & Zhao, Yongsheng & Bao, Yan & Duan, Lei & Tu, Jiahuang & Chen, Yaoran & Chen, Mingsheng, 2023. "Comparative analysis of bent and basic winglets on performance improvement of horizontal axis wind turbines," Energy, Elsevier, vol. 281(C).
    3. Fan, Menghao & Sun, Zhaocheng & Dong, Xiangwei & Li, Zengliang, 2022. "Numerical and experimental investigation of bionic airfoils with leading-edge tubercles at a low-Re in considering stall delay," Renewable Energy, Elsevier, vol. 200(C), pages 154-168.
    4. Gonçalves, Afonso N.C. & Pereira, José M.C. & Sousa, João M.M., 2022. "Passive control of dynamic stall in a H-Darrieus Vertical Axis Wind Turbine using blade leading-edge protuberances," Applied Energy, Elsevier, vol. 324(C).
    5. Wenhua Duan & Weijie Chen & Xinyu Zhao & Weiyang Qiao, 2023. "Numerical Studies on the Effect of Leading Edge Tubercles on a Low-Pressure Turbine Cascade," Energies, MDPI, vol. 16(11), pages 1-16, May.
    6. Sun, Yukun & Qian, Yaoru & Gao, Yang & Wang, Tongguang & Wang, Long, 2024. "Stall control on the wind turbine airfoil via the single and dual-channel of combining bowing and suction technique," Energy, Elsevier, vol. 290(C).
    7. Wang, Hao & Yi, Minyi & Zhang, Zutao & Zhang, Hexiang & Liu, Jizong & Zhu, Zhongyin & Wang, Qijun & Yuan, Yanping, 2023. "A wind-solar energy harvester based on airflow enhancement mechanism for rail-side devices," Energy, Elsevier, vol. 283(C).
    8. Zhu, Mingkang & Zhang, Jiacheng & Wang, Zhaohui & Yu, Xin & Zhang, Yuejun & Zhu, Jianyang & Wang, Zhong Lin & Cheng, Tinghai, 2022. "Double-blade structured triboelectric–electromagnetic hybrid generator with aerodynamic enhancement for breeze energy harvesting," Applied Energy, Elsevier, vol. 326(C).

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