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Open AccessFeature PaperArticle

Understanding the Aerodynamic Behavior and Energy Conversion Capability of Small Darrieus Vertical Axis Wind Turbines in Turbulent Flows

1
Department of Industrial Engineering (DIEF), Università degli Studi di Firenze, via di Santa Marta 3, 50139 Firenze, Italy
2
Department of Civil and Environmental Engineering (DICEA), Università degli Studi di Firenze, via di Santa Marta 3, 50139 Firenze, Italy
3
Aerospace Systems and Transport Research Group, Universidad Rey Juan Carlos, Camino del Molino S/N, Fuenlabrada, 28943 Madrid, Spain
4
Thermo and Fluid Dynamics (FLOW), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
*
Author to whom correspondence should be addressed.
Energies 2020, 13(11), 2936; https://doi.org/10.3390/en13112936
Received: 19 May 2020 / Revised: 4 June 2020 / Accepted: 5 June 2020 / Published: 8 June 2020
(This article belongs to the Special Issue Numerical Simulation of Wind Turbines)
Small Darrieus vertical-axis wind turbines (VAWTs) have recently been proposed as a possible solution for adoption in the built environment as their performance degrades less in complex and highly-turbulent flows. Some recent analyses have even shown an increase of the power coefficient for the large turbulence intensities and length scales typical of such environments. Starting from these insights, this study presents a combined numerical and experimental analysis aimed at assessing the physical phenomena that take place during the operation of a Darrieus VAWT in turbulent flows. Wind tunnel experiments provided a quantification of the performance variation of a two-blade VAWT rotor for different levels of turbulence intensity and length scale. Furthermore, detailed experiments on an individual airfoil provided an estimation of the aerodynamics at high turbulence levels and low Reynolds numbers. Computational fluid dynamics (CFD) simulations were used to extend the experimental results and to quantify the variation in the energy content of turbulent wind. Finally, the numerical and experimental inputs were synthetized into an engineering simulation tool, which can nicely predict the performance of a VAWT rotor under turbulent conditions. View Full-Text
Keywords: VAWT; Darrieus; turbulence; experiments; CFD VAWT; Darrieus; turbulence; experiments; CFD
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MDPI and ACS Style

Balduzzi, F.; Zini, M.; Molina, A.C.; Bartoli, G.; De Troyer, T.; Runacres, M.C.; Ferrara, G.; Bianchini, A. Understanding the Aerodynamic Behavior and Energy Conversion Capability of Small Darrieus Vertical Axis Wind Turbines in Turbulent Flows. Energies 2020, 13, 2936. https://doi.org/10.3390/en13112936

AMA Style

Balduzzi F, Zini M, Molina AC, Bartoli G, De Troyer T, Runacres MC, Ferrara G, Bianchini A. Understanding the Aerodynamic Behavior and Energy Conversion Capability of Small Darrieus Vertical Axis Wind Turbines in Turbulent Flows. Energies. 2020; 13(11):2936. https://doi.org/10.3390/en13112936

Chicago/Turabian Style

Balduzzi, Francesco; Zini, Marco; Molina, Andreu C.; Bartoli, Gianni; De Troyer, Tim; Runacres, Mark C.; Ferrara, Giovanni; Bianchini, Alessandro. 2020. "Understanding the Aerodynamic Behavior and Energy Conversion Capability of Small Darrieus Vertical Axis Wind Turbines in Turbulent Flows" Energies 13, no. 11: 2936. https://doi.org/10.3390/en13112936

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