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Performance characteristics of a horizontal axis turbine with fusion winglet

Author

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  • Zhu, Bing
  • Sun, Xiaojing
  • Wang, Ying
  • Huang, Diangui

Abstract

Any technique or method that can improve the efficiency in exploiting renewable wind or marine current energy has got a great significance today. It has been reported that adding a winglet at the tip of the rotor blades on a horizontal axis wind turbine can increase its power performance. The purpose of this paper is to adopt a numerical method to investigate the effects of different winglet configurations on turbine performance, especially focusing on the direction for the winglet tip to point towards (the suction side, pressure side or both sides of the main blade). The results show that the new design of an integrated fusion winglet proposed in this paper can generally improve the main blade's power producing ability, which is further enhanced with the increase of turbine's tip speed ratio with a maximum power augmentation of about 3.96%. No matter which direction the winglet tip faces, the installation angle of the winglet should match well with the real angle of incoming flow. As a whole, the turbine with winglet of two tips facing to both sides of the main blade can produce much more power than the one of winglet configuration whose tip faces only one side for different blade hub pitch angles and vast majority of tip speed ratios. The working principle behind the winglet in improving turbine performance may be that it can block the downwash fluid easily flowing around the tip section of the main blade from the pressure side to suction side, and hence diffuse and spread out the tip vortex. As a result, it finally decreases the energy loss. Besides, the relative projected rotor area in incoming flow direction will also be reduced due to the addition of the winglet, which is also helpful to turbine's power coefficient.

Suggested Citation

  • Zhu, Bing & Sun, Xiaojing & Wang, Ying & Huang, Diangui, 2017. "Performance characteristics of a horizontal axis turbine with fusion winglet," Energy, Elsevier, vol. 120(C), pages 431-440.
    • Handle: RePEc:eee:energy:v:120:y:2017:i:c:p:431-440
    DOI: 10.1016/j.energy.2016.11.094
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    References listed on IDEAS

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    1. Bahaj, A.S. & Molland, A.F. & Chaplin, J.R. & Batten, W.M.J., 2007. "Power and thrust measurements of marine current turbines under various hydrodynamic flow conditions in a cavitation tunnel and a towing tank," Renewable Energy, Elsevier, vol. 32(3), pages 407-426.
    2. Sun, Xiaojing & Huang, Diangui & Wu, Guoqing, 2012. "The current state of offshore wind energy technology development," Energy, Elsevier, vol. 41(1), pages 298-312.
    3. Nicolas Tobin & Ali M. Hamed & Leonardo P. Chamorro, 2015. "An Experimental Study on the Effects ofWinglets on the Wake and Performance of a ModelWind Turbine," Energies, MDPI, vol. 8(10), pages 1-18, October.
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    Cited by:

    1. Sedighi, Hamed & Akbarzadeh, Pooria & Salavatipour, Ali, 2020. "Aerodynamic performance enhancement of horizontal axis wind turbines by dimples on blades: Numerical investigation," Energy, Elsevier, vol. 195(C).
    2. Azlan, F. & Tan, M.K. & Tan, B.T. & Ismadi, M.-Z., 2023. "Passive flow-field control using dimples for performance enhancement of horizontal axis wind turbine," Energy, Elsevier, vol. 271(C).
    3. Khaled, Mohamed & Ibrahim, Mostafa M. & Abdel Hamed, Hesham E. & AbdelGwad, Ahmed F., 2019. "Investigation of a small Horizontal–Axis wind turbine performance with and without winglet," Energy, Elsevier, vol. 187(C).
    4. Barbarić, Marina & Batistić, Ivan & Guzović, Zvonimir, 2022. "Numerical study of the flow field around hydrokinetic turbines with winglets on the blades," Renewable Energy, Elsevier, vol. 192(C), pages 692-704.
    5. Emmanuvel Joseph Aju & Dhanush Bhamitipadi Suresh & Yaqing Jin, 2020. "The Influence of Winglet Pitching on the Performance of a Model Wind Turbine: Aerodynamic Loads, Rotating Speed, and Wake Statistics," Energies, MDPI, vol. 13(19), pages 1-15, October.
    6. 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).
    7. Santiago Laín & Manuel A. Taborda & Omar D. López, 2018. "Numerical Study of the Effect of Winglets on the Performance of a Straight Blade Darrieus Water Turbine," Energies, MDPI, vol. 11(2), pages 1-24, January.
    8. Olvera-Trejo, Rodolfo & Myers, Luke & Blunden, Luke & Bahaj, AbuBakr S., 2024. "An experimental study of the thrust and power produced by a 1/20th scale tidal turbine utilising blade winglets," Renewable Energy, Elsevier, vol. 226(C).

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