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Accueil du site > Évènements > Séminaires > Séminaires IRPHE > Archives IRPHE > 2023

Mardi 28 Mars 2023 / IRPHE

publié le

Séminaire IRPHE

Wind turbine wake characterization and mitigation

Orateur : Aliza Abraham / IRPHE

Abstract : The wind turbine wake, the region of slower and more turbulent air behind the rotor, is responsible for substantial power losses and increased structural loading within a wind farm. To mitigate these detrimental effects, improved understanding of the underlying flow-structure interactions is required. The first part of the talk focuses on characterizing the influence of constant changes in incoming flow and turbine operational conditions experienced by wind turbines operating in the atmospheric boundary layer on the wake. This analysis is conducted using a novel flow imaging technique where natural snowflakes serve as tracers for visualizing the motion of the air around a utility-scale wind turbine at high spatio-temporal resolution. The findings of this study can inform the design of wind farm layouts and innovative control strategies to minimize the detrimental impacts of the wake. One such control strategy is proposed and explored using a simplified model, water channel experiments, and high-resolution simulations in the second part of the talk. The strategy investigated perturbs the system of vortices shed from the turbine blades by introducing a slight asymmetry to the rotor. Because the vortex system is unstable, the perturbation grows exponentially, breaking down the vortices and allowing the wake to mix with the surrounding flow.

Date et lieu : le mardi 28 mars à 11h00, salle de séminaires IRPHE

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