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In this paper we investigated numerically the possibilities to control the dynamic stall phenomenon, with application to vertical axis wind turbines (VAWT). The dynamic stall appears at low tip speed ratio (TSR<4) and it has a great impact on structural integrity of the wind turbine and power performances. For this reason we performed a computational analysis of the dynamic stall phenomenon around NACA 0012 airfoil equipped with passive flow control device, in pitching motion at relative low Reynolds number (~105). Two passive flow control devices have been numerically investigated: turbulence promoter mounted on the leading edge and step on the upper surface of the airfoil. For the present studies, unsteady Reynolds averaged Navier-Stokes (RANS) model is the suitable approach to perform the dynamic stall simulations with an acceptable computational cost and reasonable accuracy. The results are compared to those of an existing experimental case test for unmodified NACA 0012 airfoil. [ABSTRACT FROM AUTHOR]

Information about a symposium on Mathematical Modeling and Numerical Analysis of Aerodynamic, Aeroelasticity and Noise for Wind Turbines is presented. Topics include the estimation of wind turbine performance, optimization of wind turbines, and the blade-tower coupling effect. The event also highlighted the design, aerodynamic and aeroelasticity characteristics estimation, and performance prediction of wind turbine using mathematical modelling and numerical analysis.