Controlling dynamic stall using vortex generators on a wind turbine airfoil

• DOI: 10.1016/j.renene.2021.03.019
• Publication Date: 2021-03-26T13:45:17Z
• Authors: D. De Tavernier; C. Ferreira; A. Viré; B. LeBlanc; S. Bernardy
• Keywords: Stall (fluid mechanics); Vortex generator

Vortex generators (VGs) have proven their capabilities in wind turbine applications to delay stall steady flow conditions. However, behaviour unsteady conditions is insufficiently understood. This paper presents an experimental study that demonstrates the effect of VGs flow, including controlling and suppressing dynamic process. An airfoil, particularly designed for a vertical-axis turbine, has been tested tunnel caused by sinusoidal pitching motion. The pressure distributions, lift, drag moment were measured range cases. cases vary motion (mean angle attack, frequency, amplitude) VG configuration. shown or even suppress depending on configuration, with important factors being height mounting position. promote later onset reduce hysteresis loop. As soon as VG's effectiveness vanishes, configurations show severe loss normal coefficient, larger than case clear airfoil. reattaches quicker airfoil recovers easier from deep-stall results demonstrate use significantly changes aerodynamic loads. database can serve validation purposes evaluate whether current modelling strategies are sufficient blades equipped VGs.