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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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https://doi.org/10.5194/wes-2019-98
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2019-98
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 16 Dec 2019

Submitted as: research article | 16 Dec 2019

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This preprint is currently under review for the journal WES.

Performance analysis of a Darrieus-type wind turbine for a series of 4-digit NACA airfoils

Krzysztof Rogowski1, Martin Otto Laver Hansen2, and Galih Bangga3 Krzysztof Rogowski et al.
  • 1Institute of Aeronautics and Applied Mechanics, Warsaw University of Technology, Warsaw, 00-665, Poland
  • 2Department of Wind Energy, Technical University of Denmark, Lyngby, DK2800, Denmark
  • 3Institute of Aerodynamics and Gas Dynamics, University of Stuttgart, Stuttgart, 70569, Germany

Abstract. The purpose of this paper is to estimate the H-Darrieus wind turbine aerodynamic performance, aerodynamic blade loads and velocity profiles downstream behind the rotor. The wind turbine model is based on the rotor designed by McDonnell Aircraft Company. The model proposed here consists of three fixed straight blades; in the future this model is planned to be develop with controlled blades. The study was conducted using the unsteady Reynolds averaged Navier-Stokes (URANS) approach with the k-ω shear stress transport (SST) turbulence model. The numerical two-dimensional model was verified using two other independent aerodynamic approaches: the vortex model developed in Technical University of Denmark (DTU) and the extended version of the CFD code FLOWer at the University of Stuttgart (USTUTT). All utilized numerical codes gave similar result of the instantaneous aerodynamic blade loads. In addition, steady-state calculations for the applied airfoils were also made using the same numerical model as for the vertical axis wind turbine (VAWT) to obtain lift and drag coefficients. The obtained values of lift and drag force coefficients, for a Reynolds number of 2.9 million, agree with the predictions of the experiment and XFoil over a wide range of angle of attack. The maximum rotor power coefficients are obtained at 0.5, which makes this impeller attractive from the point of view of further research. This work also addresses the issue of determining the aerodynamic performance of the rotor with various 4-digit NACA airfoils. The effect of two airfoil parameters, maximum airfoil thickness and maximum camber, on aerodynamic rotor performance is investigated. Research has shown that if this rotor were to work with fixed blades it is recommended to use the NACA 1418 airfoil instead of the original NACA 0018.

Krzysztof Rogowski et al.

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Krzysztof Rogowski et al.

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Latest update: 08 Apr 2020
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Short summary
I believe that this article contains many valuable tips for engineers that can be useful when constructing medium size vertical-axis wind turbines. Currently, there is still a lack of research on large and medium rotors.
I believe that this article contains many valuable tips for engineers that can be useful when...
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