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Flow Control over the Blunt Trailing Edge of Wind Turbine Airfoils Using Circulation Control

Author

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  • He-Yong Xu

    (School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
    Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, China)

  • Qing-Li Dong

    (School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China)

  • Chen-Liang Qiao

    (School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
    Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, China)

  • Zheng-Yin Ye

    (School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China)

Abstract

A new partial circulation control (PCC) method is implemented on the blunt trailing edge DU97-Flatback airfoil, and compared with the traditional full circulation control (FCC) based on numerical analysis. When the Coanda jet is deactivated, PCC has an attractive advantage over FCC, since the design of PCC doesn’t degrade aerodynamic characteristics of the baseline flatback section, in contrast to FCC, which is important in practical use in case of failure of the circulation control system. When the Coanda jet is activated, PCC also outperforms FCC in several respects. PCC can produce much higher lift coefficients than FCC over the entire range of angles of attack as well as the entire range of jet momentum coefficients under investigation, but with slightly higher drag coefficients. The flow field of PCC is less complex than that of FCC, indicating less energy dissipation in the main flow and hence less power expenditure for the Coanda jet. The aerodynamic figure of merit (AFM) and control efficiency for circulation control are defined, and results show that PCC has much higher AFM and control efficiency than FCC. It is demonstrated that PCC outperforms FCC in terms of effectiveness, efficiency and reliability for flow control in the blunt trailing edge wind turbine application.

Suggested Citation

  • He-Yong Xu & Qing-Li Dong & Chen-Liang Qiao & Zheng-Yin Ye, 2018. "Flow Control over the Blunt Trailing Edge of Wind Turbine Airfoils Using Circulation Control," Energies, MDPI, vol. 11(3), pages 1-26, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:619-:d:135700
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    References listed on IDEAS

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    1. Xu, He-Yong & Qiao, Chen-Liang & Yang, Hui-Qiang & Ye, Zheng-Yin, 2017. "Delayed detached eddy simulation of the wind turbine airfoil S809 for angles of attack up to 90 degrees," Energy, Elsevier, vol. 118(C), pages 1090-1109.
    2. He-Yong Xu & Chen-Liang Qiao & Zheng-Yin Ye, 2016. "Dynamic Stall Control on the Wind Turbine Airfoil via a Co-Flow Jet," Energies, MDPI, vol. 9(6), pages 1-25, June.
    3. Lee, Sung Gun & Park, Sang Jun & Lee, Kyung Seo & Chung, Chinwha, 2012. "Performance prediction of NREL (National Renewable Energy Laboratory) Phase VI blade adopting blunt trailing edge airfoil," Energy, Elsevier, vol. 47(1), pages 47-61.
    4. Sedaghat, Ahmad & Hassanzadeh, Arash & Jamali, Jamaloddin & Mostafaeipour, Ali & Chen, Wei-Hsin, 2017. "Determination of rated wind speed for maximum annual energy production of variable speed wind turbines," Applied Energy, Elsevier, vol. 205(C), pages 781-789.
    5. Lanzafame, R. & Messina, M., 2010. "Horizontal axis wind turbine working at maximum power coefficient continuously," Renewable Energy, Elsevier, vol. 35(1), pages 301-306.
    6. Sun, Xiaojing & Huang, Diangui & Wu, Guoqing, 2012. "The current state of offshore wind energy technology development," Energy, Elsevier, vol. 41(1), pages 298-312.
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    Cited by:

    1. Hai Du & Lejie Yang & Shuo Chen & Wenxiao Zhang & Shengchun Han, 2022. "Effect of Multistage Circulation Control on Blade Aerodynamic Performance," Energies, MDPI, vol. 15(19), pages 1-21, October.
    2. Shunlei Zhang & Xudong Yang & Bifeng Song, 2021. "Numerical Investigation of Performance Enhancement of the S809 Airfoil and Phase VI Wind Turbine Blade Using Co-Flow Jet Technology," Energies, MDPI, vol. 14(21), pages 1-20, October.
    3. Md Zishan Akhter & Farag Khalifa Omar, 2021. "Review of Flow-Control Devices for Wind-Turbine Performance Enhancement," Energies, MDPI, vol. 14(5), pages 1-35, February.
    4. Xinkai Li & Ke Yang & Hao Hu & Xiaodong Wang & Shun Kang, 2019. "Effect of Tailing-Edge Thickness on Aerodynamic Noise for Wind Turbine Airfoil," Energies, MDPI, vol. 12(2), pages 1-25, January.

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