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The effects of aerofoil profile modification on a vertical axis wind turbine performance

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  • Ismail, Md Farhad
  • Vijayaraghavan, Krishna

Abstract

This paper investigates the effect of profile-modifications on a NACA-0015 aerofoil used in VAWTs (vertical axis wind turbines). The profile-modifications being investigated consist of a combination of inward semi-circular dimple and Gurney flap at the lower surface of the NACA-0015 aerofoil. Rather than maximize the lift-coefficient or the ratio of the lift to drag coefficients, this paper choose to maximize the average (or effective) torque of the VAWT as this is a much better measure of the power produced. A fully automated optimization using RSA (Response Surface Approximation) is utilized here to maximize the average torque produced by the wind turbine blade. The data-set used in the optimization is generated using CFD (computational fluid dynamics) simulations. In order to ensure reliability, the computational domain and the turbulence model used in the CFD simulations are validated against previous experimental results. The optimized shape of the modified aerofoil is shown to improve the aerodynamics of the wind turbine blade.

Suggested Citation

  • Ismail, Md Farhad & Vijayaraghavan, Krishna, 2015. "The effects of aerofoil profile modification on a vertical axis wind turbine performance," Energy, Elsevier, vol. 80(C), pages 20-31.
    • Handle: RePEc:eee:energy:v:80:y:2015:i:c:p:20-31
    DOI: 10.1016/j.energy.2014.11.034
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    References listed on IDEAS

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    1. Islam, Mazharul & Ting, David S.-K. & Fartaj, Amir, 2008. "Aerodynamic models for Darrieus-type straight-bladed vertical axis wind turbines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(4), pages 1087-1109, May.
    2. Gharali, Kobra & Johnson, David A., 2012. "Numerical modeling of an S809 airfoil under dynamic stall, erosion and high reduced frequencies," Applied Energy, Elsevier, vol. 93(C), pages 45-52.
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