Calibration of a super-Gaussian wake model with a focus on near-wake characteristics

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Abstract

Offshore wind turbine near wakes can extend downstream up to 5D due to low atmospheric turbulence intensities. They are characterised by strong velocity deficits, a transitioning Gaussian shape, and strong added turbulence intensities. Classical analytical wake models are still used due to their low computational costs, but they mainly focus on far-wake characteristics. A super-Gaussian wake model valid in near-and far-wake regions has recently been developed at IFP Energies nouvelles. This wake model requires calibration and validation. To this end, large-eddy simulations of the large DTU-10MW reference wind turbine under different neutrally stratified atmospheric flows are carried out with the LES Meso-NH model. A database is generated based on these results and used to calibrate and validate the super-Gaussian model.

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Cathelain, M., Blondel, F., Joulin, P. A., & Bozonnet, P. (2020). Calibration of a super-Gaussian wake model with a focus on near-wake characteristics. In Journal of Physics: Conference Series (Vol. 1618). IOP Publishing Ltd. https://doi.org/10.1088/1742-6596/1618/6/062008

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