Performance enhancements on wind turbines using flow controllers: A review

Abstract. An effective strategy for enhancing the performance of wind turbines has been identified in the utilization of flow controllers. In this review paper, recent advances in flow control techniques and their impact on the aerodynamic performance of wind turbines at different Tip Speed Ratios (TSRs) are summarized. Emphasis is placed on the examination of the effects of various geometrical parameters of flow controllers on the performance of wind turbines through numerical studies. The aerodynamic principles underlying each flow controller and their functioning on wind turbines are elucidated for each flow controller. The geometrical parameters of each flow controller, as explored in prior studies, are the focal point. The TSR range in which each technique is most effective, along with the advantages and limitations of each, is identified. Furthermore, the current state of knowledge concerning the utilization of active flow controllers and their impact on wind turbine performance is discussed. In conclusion, this comprehensive review paper presents an overview of state-of-the-art research on flow controllers for wind turbines, with a specific focus on the geometrical parameters and TSRs studied, and identifies potential areas for future research and development.