Abstract
The efficiency of a pair of wind turbines is experimentally investigated for the case when the model of the second rotor is coaxially located in the wake of the first one. This configuration implies the maximum level of losses in wind farms, as in the rotor wakes, the deceleration of the freestream is maximum. As a result of strain gauge measurements, the dependences of dimensionless power characteristics of both rotors on the distances between them were determined for different modes at different tip speed ratios. The obtained results are of interest for further development of aerodynamics of wind turbines, for optimizing the work of existing wind farms and reducing their power losses due to interactions with wakes of other wind turbines during design and calculation.
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The work was financially supported by the grant of the Russian Science Foundation (Project No. 14-19-00487).
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Okulov, V.L., Naumov, I.V., Tsoy, M.A. et al. Loss of efficiency in a coaxial arrangement of a pair of wind rotors. Thermophys. Aeromech. 24, 545–551 (2017). https://doi.org/10.1134/S0869864317040059
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DOI: https://doi.org/10.1134/S0869864317040059