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Performance-optimized airfoil for Darrieus wind turbines

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  • Bedon, Gabriele
  • De Betta, Stefano
  • Benini, Ernesto

Abstract

An optimization method, featuring a loop algorithm which includes a genetic optimizer, a two-dimensional URANS CFD model, a fitness calculator and an airfoil generator, is created and deployed to develop a new airfoil shape which can possibly increase the aerodynamic performance of a Darrieus wind turbine. The two-dimensional URANS CFD model is validated against a baseline Darrieus rotor, whose experimental data are available in literature. The optimization included as initial solutions the most common airfoils described in literature and is targeted to increase the aerodynamic performance of the two-dimensional model of the baseline rotor at fixed wind and rotational speeds. The optimization resulted in a new airfoil shape showing a particular configuration of mean line and thickness distribution. The airfoil aerodynamics is analyzed by estimating the aerodynamic coefficients and pressure distributions at different operative conditions.

Suggested Citation

  • Bedon, Gabriele & De Betta, Stefano & Benini, Ernesto, 2016. "Performance-optimized airfoil for Darrieus wind turbines," Renewable Energy, Elsevier, vol. 94(C), pages 328-340.
    • Handle: RePEc:eee:renene:v:94:y:2016:i:c:p:328-340
    DOI: 10.1016/j.renene.2016.03.071
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    References listed on IDEAS

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    1. Raciti Castelli, Marco & Englaro, Alessandro & Benini, Ernesto, 2011. "The Darrieus wind turbine: Proposal for a new performance prediction model based on CFD," Energy, Elsevier, vol. 36(8), pages 4919-4934.
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    4. Raciti Castelli, Marco & Dal Monte, Andrea & Quaresimin, Marino & Benini, Ernesto, 2013. "Numerical evaluation of aerodynamic and inertial contributions to Darrieus wind turbine blade deformation," Renewable Energy, Elsevier, vol. 51(C), pages 101-112.
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