Vol. 11, No.1, pp.2-8 (2017)
Elongated-DBD Actuators Inducing Curved Wall Jets for Circulation Control Around Turbine Airfoils
A. Leroy1, J. Podlinski2, S. Baleriola1, P. Devinant1, and S. Aubrun1
1University of Orléans, France
2The Szewalski Institute of Fluid Flow Machinery, Polish Academy of Sciences, Poland
Abstract
A feasibility study for implementing circulation control method to improve aerodynamic load alleviation on wind turbine blade airfoils was performed. The experiments investigated the ability of surface elongated-DBD actuators attempting to control the streamline separation point at a rounded trailing edge, leading to the modification of the velocity vector circulation, and so, the resulting lift. Depending on the implementation at the trailing edge, the actuator induces a wall jet directed to the lower or the upper surface of the airfoil, increasing or decreasing the lift respectively, keeping constant the angle of attack. First the flow induced by the elongated-DBD implemented on a curved surface is investigated in quiescent air conditions. Then, results of the preliminary testing of circulation control are presented showing ±8% variation in lift obtained with this actuator configuration implemented on an airfoil with a chord of 300 mm at a freestream velocity of 10 m/s.
Keywords - DBD actuator, curved surface plasma actuator, circulation control