Abstract
In this paper, the new modified vortex generator was developed for wind turbine airfoils. The wind tunnel experiments were conducted to examine the effectiveness of the modified vortex generator. The effect of Reynolds number, height and interval of vortex generator were also examined by the wind tunnel experiments. The former vortex generator of which section is flat plate enhances the lift, however, the drag also increase simultaneously. On the other hand, lift to drag ratio considerably increased by means of the modified vortex generator, especially in low Reynolds number Re=100,000-400,000. Therefore, it was verified that the modified vortex generator is suitable especially for airfoil of small wind turbines.
