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Airfoil optimization for noise emission problem and aerodynamic performance criterion on small scale wind turbines

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  • Göçmen, Tuhfe
  • Özerdem, Barış

Abstract

Noise emission is one of the major concerns in wind turbine industry and especially for small scale wind turbines, which are mostly erected to the urban areas; the concern is turning into a problem. This paper focuses on the optimization of six airfoils which are widely used on small scale wind turbines in terms of the noise emission and performance criteria and the numerical computations are performed for a typical 10 kW wind turbine. The main purpose of this optimization process is to decrease the noise emission levels while increasing the aerodynamic performance of a small scale wind turbine by adjusting the shape of the airfoil. The sources of the broadband noise emission are defined and their dominancy is investigated with respect to the operating conditions. While redesigning, together with the principals of reducing the airfoil self-noise, the aerodynamic prospects of increasing the performance have been taken into account. The codes which are based on aero-acoustic empirical models and a collection of well-known aerodynamic functions are used in this study. The results obtained from the numerical analysis of the optimization process have shown that, the considered commercial airfoils for small scale wind turbines are improved in terms of aero-acoustics and aerodynamics. The pressure sides of the baseline airfoils have been manipulated together with the trailing edge and redesigned airfoils have lower levels of noise emission and higher lift to drag ratios.

Suggested Citation

  • Göçmen, Tuhfe & Özerdem, Barış, 2012. "Airfoil optimization for noise emission problem and aerodynamic performance criterion on small scale wind turbines," Energy, Elsevier, vol. 46(1), pages 62-71.
    • Handle: RePEc:eee:energy:v:46:y:2012:i:1:p:62-71
    DOI: 10.1016/j.energy.2012.05.036
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    1. Hoogedoorn, Eelco & Jacobs, Gustaaf B. & Beyene, Asfaw, 2010. "Aero-elastic behavior of a flexible blade for wind turbine application: A 2D computational study," Energy, Elsevier, vol. 35(2), pages 778-785.
    2. Kim, Hogeon & Lee, Seunghoon & Son, Eunkuk & Lee, Seungmin & Lee, Soogab, 2012. "Aerodynamic noise analysis of large horizontal axis wind turbines considering fluid–structure interaction," Renewable Energy, Elsevier, vol. 42(C), pages 46-53.
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    Cited by:

    1. Li, Yingjue & Wei, Kexiang & Yang, Wenxian & Wang, Qiong, 2020. "Improving wind turbine blade based on multi-objective particle swarm optimization," Renewable Energy, Elsevier, vol. 161(C), pages 525-542.
    2. Hernández, Ó. Soto & Volkov, K. & Martín Mederos, A.C. & Medina Padrón, J.F. & Feijóo Lorenzo, A.E., 2015. "Power output of a wind turbine installed in an already existing viaduct," Renewable and Sustainable Energy Reviews, Elsevier, vol. 48(C), pages 287-299.

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