The effect of dynamic near-wake modulation on utility-scale wind turbine wake development

Aliza Abraham, Luis A. Martínez-Tossas, Jiarong Hong

Research output: Contribution to journalConference articlepeer-review

Abstract

High-resolution field-scale experiments using flow visualization with natural snowfall and high-fidelity large eddy simulations are combined to investigate the effect of dynamic turbine operation and atmospheric conditions on wind turbine wake mixing and recovery in the wake of a 2.5 MW wind turbine. Instantaneous near-wake expansion and deflection in response to changes in blade pitch and wind direction, termed dynamic wake modulation, is quantified using both techniques, demonstrating excellent agreement. The simulations are used to extend these results by calculating the energy flux into the wake 7 rotor diameters downstream, showing that dynamic turbine-atmospheric interactions enhance mixing in the far-wake. This finding is exhibited under both uniform and turbulent inflow conditions. Under turbulent flow, a synergistic relationship is also observed between dynamic wake modulation and wake meandering, as wake recovery can be further accelerated when the two phenomena occur together. The results of this study have implications for the development of more realistic far-wake models that include the significant impact of dynamic wake modulation on wake mixing and development. Additionally, the findings from the current study can be used to develop advanced control algorithms to speed up wake breakdown and recovery, further improving wind farm efficiency.

Original languageEnglish (US)
Article number062063
JournalJournal of Physics: Conference Series
Volume1618
Issue number6
DOIs
StatePublished - Sep 22 2020
EventScience of Making Torque from Wind 2020, TORQUE 2020 - Virtual, Online, Netherlands
Duration: Sep 28 2020Oct 2 2020

Bibliographical note

Publisher Copyright:
© Published under licence by IOP Publishing Ltd.

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