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Control of a boundary layer over a wind turbine blade using distributed passive roughness

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  • Özkan, Musa
  • Erkan, Onur

Abstract

Wind turbines are mostly prone to reduced aerodynamic performance due to the inevitable occurrence of the roughness on blades. However, it may be possible to control the boundary layer by means of the right sort of roughness. In this study, distributed passive roughness is applied to the surface of NACA 63–415 airfoil. The influence of the roughness on the aerodynamic performance is numerically investigated by means of the TSST turbulence model for 103 ≤ Re ≤ 3 × 106 and for the angle of attack α = 6°. Results show that the effect of roughness on the airfoil performance is negligible for Re ≤ 104. However, for 5 × 104 ≤ Re ≤ 1.5 × 105, the surface roughness can significantly improve the aerodynamic performance. Furthermore, for Re = 2.5 × 105, the roughness still has a favourable effect until the roughness height of h = 0.1 mm. Moreover, it is observed that for 2.5 × 105 < Re ≤ 3 × 106, the lift to drag ratio is decreased by the application of roughness. Consequently, this study reveals that the implementation of the right sort of roughness can enhance the aerodynamic performance of the investigated wind turbine blade profile for some particular flow conditions.

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  • Özkan, Musa & Erkan, Onur, 2022. "Control of a boundary layer over a wind turbine blade using distributed passive roughness," Renewable Energy, Elsevier, vol. 184(C), pages 421-429.
    • Handle: RePEc:eee:renene:v:184:y:2022:i:c:p:421-429
    DOI: 10.1016/j.renene.2021.11.082
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    References listed on IDEAS

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    1. Peter Carpenter, 1997. "The right sort of roughness," Nature, Nature, vol. 388(6644), pages 713-714, August.
    2. Mishnaevsky, Leon & Hasager, Charlotte Bay & Bak, Christian & Tilg, Anna-Maria & Bech, Jakob I. & Doagou Rad, Saeed & Fæster, Søren, 2021. "Leading edge erosion of wind turbine blades: Understanding, prevention and protection," Renewable Energy, Elsevier, vol. 169(C), pages 953-969.
    3. Sagol, Ece & Reggio, Marcelo & Ilinca, Adrian, 2013. "Issues concerning roughness on wind turbine blades," Renewable and Sustainable Energy Reviews, Elsevier, vol. 23(C), pages 514-525.
    4. L. Sirovich & S. Karlsson, 1997. "Turbulent drag reduction by passive mechanisms," Nature, Nature, vol. 388(6644), pages 753-755, August.
    5. Erkan, Onur & Özkan, Musa & Karakoç, T. Hikmet & Garrett, Stephen J. & Thomas, Peter J., 2020. "Investigation of aerodynamic performance characteristics of a wind-turbine-blade profile using the finite-volume method," Renewable Energy, Elsevier, vol. 161(C), pages 1359-1367.
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    Cited by:

    1. Akhter, Md Zishan & Ali, Ahmed Riyadh & Jawahar, Hasan Kamliya & Omar, Farag Khalifa & Elnajjar, Emad, 2023. "Performance enhancement of small-scale wind turbine featuring morphing blades," Energy, Elsevier, vol. 278(C).
    2. Jamshid Ali Turi & Joanna Rosak-Szyrocka & Maryam Mansoor & Hira Asif & Ahad Nazir & Daniel Balsalobre-Lorente, 2022. "Assessing Wind Energy Projects Potential in Pakistan: Challenges and Way Forward," Energies, MDPI, vol. 15(23), pages 1-21, November.

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