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Passive Flow Control Application Using Single and Double Vortex Generator on S809 Wind Turbine Airfoil

Author

Listed:
  • Mustafa Özden

    (Wind Engineering and Aerodynamic Research Laboratory, Department of Energy Systems Engineering, Erciyes University, 38039 Kayseri, Turkey
    Scientific Research Projects Unit, Erciyes University, 38039 Kayseri, Turkey)

  • Mustafa Serdar Genç

    (Wind Engineering and Aerodynamic Research Laboratory, Department of Energy Systems Engineering, Erciyes University, 38039 Kayseri, Turkey
    Energy Conversion Research and Application Center, Erciyes University, 38039 Kayseri, Turkey
    MSG Teknoloji Ltd., Şti, Erciyes Teknopark Tekno-1 Binası, 61/20, 38039 Kayseri, Turkey)

  • Kemal Koca

    (Wind Engineering and Aerodynamic Research Laboratory, Department of Energy Systems Engineering, Erciyes University, 38039 Kayseri, Turkey
    Department of Mechanical Engineering, Abdullah Gül University, 38080 Kayseri, Turkey)

Abstract

The current study is aimed at investigating the influences of vortex generator (VG) applications mounted to the suction and pressure surfaces of the S809 wind turbine airfoil at low Reynolds number flow conditions. Both single and double VG applications were investigated to provide technological advancement in wind turbine blades by optimizing their exact positions on the surface of the airfoil. The results of the smoke-wire experiment for the uncontrolled case reveal that a laminar separation bubble formed near the trailing edge of the suction surface, and it was moved towards the leading edge as expected when the angle of attack was increased, resulting in bubble burst and leading-edge flow separation at α = 12°. The u/U ∞ , laminar kinetic energy and total fluctuation energy contours obtained from the numerical study clearly show that both the single and double VG applications produced small eddies, and those eddies in the double VG case led the flow to be reattached at the trailing edge of the suction surface and to gain more momentum by energizing. This situation was clearly supported by the results of aerodynamic force; the double VG application caused the lift coefficient to increase, resulting in an enhancement of the aerodynamic performance. A novel finding is that the VG at the pressure surface caused the flow at the wake region to gain more energy and momentum, resulting in a reattached and steadier flow condition.

Suggested Citation

  • Mustafa Özden & Mustafa Serdar Genç & Kemal Koca, 2023. "Passive Flow Control Application Using Single and Double Vortex Generator on S809 Wind Turbine Airfoil," Energies, MDPI, vol. 16(14), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:14:p:5339-:d:1192655
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    References listed on IDEAS

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