High Reynolds investigations on the ability of the full scale e-TellTale sensor to detect flow separation on a wind turbine blade section

Antoine Soulier (1, 2) , Caroline Braud (1) , Dimitri Voisin (2) , Danbon Frédéric (3)

1 LHEEA - Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique
2 Entreprise MerAgitée
3 CSTB - Centre Scientifique et Technique du Bâtiment

Abstract. The complexity of the flow over a wind turbine blade makes its understanding and monitoring a challenging task, especially on operating wind turbines. The innovative e-Telltale sensor is developed for that purpose : detecting the flow separation on wind turbines blades. In this paper, high Reynolds wind tunnel tests have been performed with different configurations of full scale e-Telltale sensors and wall pressure measurements on a wind turbine blade section. A comparison between the lift curve and the e-Telltale signal was used to evaluate the ability of the sensor to detect flow separation. Results show different interesting properties of the sensor response depending on its size, position along the chord and its fitting process that could be used in real applications.

Domaines: Milieux fluides et réactifs; Ingénierie de l'environnement

Antoine Soulier, Caroline Braud, Dimitri Voisin, Danbon Frédéric. High Reynolds investigations on the ability of the full scale e-TellTale sensor to detect flow separation on a wind turbine blade section. 2021. ⟨hal-03437712⟩