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Parametric Study on a Performance of a Small Counter-Rotating Wind Turbine

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  • Michał Pacholczyk

    (Faculty of Electrical and Control Engineering, Gdańsk University of Technology, 80-233 Gdańsk, Poland)

  • Dariusz Karkosiński

    (Faculty of Electrical and Control Engineering, Gdańsk University of Technology, 80-233 Gdańsk, Poland)

Abstract

A small Counter-Rotating Wind Turbine (CRWT) has been proposed and its performance has been investigated numerically. Results of a parametric study have been presented in this paper. As parameters, the axial distance between rotors and a tip speed ratio of each rotor have been selected. Performance parameters have been compared with reference to a Single Rotor Wind Turbine (SRWT). Simulations were carried out with Computational Fluids Dynamics (CFD) solver and a Large Eddy Scale approach to model turbulences. An Actuator Line Model has been chosen to represent rotors in the computational domain. Summing up the results of simulation tests, it can be stated that when constructing a CRWT turbine, rotors should be placed at a distance of at least 0.5 D (where D is rotor outer diameter) or more. One can then expect a noticeable power increase compared to a single rotor turbine. Placing the second rotor closer than 0.5 D guarantees a significant increase in power, but in such configurations, dynamic interactions between the rotors are visible, resulting in fluctuations in torque and power. Dynamic interactions between rotor blades above 0.5 D are invisible.

Suggested Citation

  • Michał Pacholczyk & Dariusz Karkosiński, 2020. "Parametric Study on a Performance of a Small Counter-Rotating Wind Turbine," Energies, MDPI, vol. 13(15), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3880-:d:391754
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    References listed on IDEAS

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    1. Booker, J.D. & Mellor, P.H. & Wrobel, R. & Drury, D., 2010. "A compact, high efficiency contra-rotating generator suitable for wind turbines in the urban environment," Renewable Energy, Elsevier, vol. 35(9), pages 2027-2033.
    2. Peter J. Schubel & Richard J. Crossley, 2012. "Wind Turbine Blade Design," Energies, MDPI, vol. 5(9), pages 1-25, September.
    3. Lee, Seungmin & Kim, Hogeon & Son, Eunkuk & Lee, Soogab, 2012. "Effects of design parameters on aerodynamic performance of a counter-rotating wind turbine," Renewable Energy, Elsevier, vol. 42(C), pages 140-144.
    4. Lee, Seungmin & Son, Eunkuk & Lee, Soogab, 2013. "Velocity interference in the rear rotor of a counter-rotating wind turbine," Renewable Energy, Elsevier, vol. 54(C), pages 235-240.
    5. Mircea Neagoe & Radu Saulescu & Codruta Jaliu, 2019. "Design and Simulation of a 1 DOF Planetary Speed Increaser for Counter-Rotating Wind Turbines with Counter-Rotating Electric Generators," Energies, MDPI, vol. 12(9), pages 1-19, May.
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    Cited by:

    1. Radu Saulescu & Mircea Neagoe & Codruta Jaliu & Olimpiu Munteanu, 2021. "A Comparative Performance Analysis of Counter-Rotating Dual-Rotor Wind Turbines with Speed-Adding Increasers," Energies, MDPI, vol. 14(9), pages 1-21, May.

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