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Small wind turbine augmentation: Numerical investigations of shrouded- and twin-rotor wind turbines

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  • Lipian, Michal
  • Dobrev, Ivan
  • Massouh, Fawaz
  • Jozwik, Krzysztof

Abstract

The outcomes of research in increased-efficiency wind energy converters – twin-rotor- and shrouded wind turbines – are presented. The results of URANS simulations for various configurations of single- and twin-rotor, bare and shrouded machines are evaluated. A Fully-resolved Rotor Model with a sliding mesh approach was implemented into ANSYS CFX. A good correlation with the experimental data was shown. The model was used in a general study of the flow nature in the rotor plane, notably velocity fields. The distribution of aerodynamic forces on the blades, which permitted the aerodynamic force (lift and drag) coefficients to be determined in a reverse-BET procedure and to see how the shrouding modifies blade tip losses, was also analysed.

Suggested Citation

  • Lipian, Michal & Dobrev, Ivan & Massouh, Fawaz & Jozwik, Krzysztof, 2020. "Small wind turbine augmentation: Numerical investigations of shrouded- and twin-rotor wind turbines," Energy, Elsevier, vol. 201(C).
    • Handle: RePEc:eee:energy:v:201:y:2020:i:c:s0360544220306952
    DOI: 10.1016/j.energy.2020.117588
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    References listed on IDEAS

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    2. Rahimi, H. & Schepers, J.G. & Shen, W.Z. & García, N. Ramos & Schneider, M.S. & Micallef, D. & Ferreira, C.J. Simao & Jost, E. & Klein, L. & Herráez, I., 2018. "Evaluation of different methods for determining the angle of attack on wind turbine blades with CFD results under axial inflow conditions," Renewable Energy, Elsevier, vol. 125(C), pages 866-876.
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