Characteristics of the turbulent wake of a wind turbine model

Adrián Roberto Wittwer, Rodrigo Dorado, Acir Loredo-Souza, Arthur Bones, Bruno Capeller, André Contini, Bardo Bodmann, Gervásio Annes Degrazia

Abstract


An experimental study of the turbulent wake of a wind turbine model was realized at the “Joaquim Blessmann” wind tunnel of the UFRGS. The turbine model was developed at the Universidade de Caxias do Sul and it represents a three blade turbine characterized by a NACA 4412 aerodynamic profile. Measurements of the velocity fluctuations were realized by hot wire anemometry. Complexity of the turbulent flow is evaluated by mean and fluctuating velocity profiles. The influence of the incident flow turbulence and the flow reconstructing process are analyzed by the measurement results.

Keywords


Eolic turbines; Wind tunnel; Turbulence

References


BARTL J. Wake Measurements behind an array of two Model Wind Turbines [thesis], KTH School of Industrial Engineering and Management Energy Technology, EGI-2011-127 MSC EKV 866, Division of Heat and Power Technology, SE-100 44 Stockholm; 2011.

BAYATI I, BELLOLI M, BERNINI L, ZASSO A. Aerodynamic design methodology for wind tunnel tests of wind turbine rotors. J. Wind Eng. Ind. Aerodyn. 2017; 167: 217-227.

BLESSMANN J. The Boundary Layer Wind Tunnel of UFRGS. J. Wind Eng. Ind. Aerodyn. 1982; 10: 231-248.

CHAMORRO L, PORTÉ-AGEL F. Turbulent Flow Inside and Above a Wind Farm: A Wind-Tunnel Study. Energies. 2011; 4: 1916-1936.

FRANDSEN S, BARTHELMIE R, PRYOR S, RATHMANN O, LARSEN S, HØJSTRUP J et al. Analytical modeling of wind speed deficit in large offshore wind farms. In: Proceedings of EWEC; 2004 Nov 22-25, London, UK.

THUMTHAE C, CHITSOMBOON T. Optimal angle of attack for untwisted blade Wind turbine. Renewable Energy. 2009; 34: 1279-1284.

WITTWER A, DORADO R, ALVAREZ Y ALVAREZ G, DEGRAZIA G, LOREDO-SOUZA A, BODMANN B. Flow in the Wake of Wind Turbines: Turbulence Spectral Analysis by Wind Tunnel Tests. American Journal of Environmental Engineering. 2016; 6: 109-115.




DOI: https://doi.org/10.5902/2179460X30734

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