Abstract
The effect of aerodynamic control using a non-thermal dielectric-barrier-discharge (NTDBD) plasma actuator for improving wind turbine performance was investigated experimentally. Wind tunnel experiments were done using a small horizontal axis wind turbine (300W). Changing inlet wind velocity, the turbine speed were measured and relations of total coefficient against tip speed ratio of the turbine were obtained for yaw angle of 0, 15 ,30 and 45 degree for both the "plasma actuator off' and the "plasma actuator on" cases, respectively. It was found that even in a rotating wind turbine blade flow experiment, the plasma actuator mounted on each leading edge of the turbine blade suppresses dynamic stall and consequently significant improvement of the turbine was realized in the low tip speed ratio region in the "plasma actuator on" case for yaw angle 15, 30 and 45 degree. Mechanism of plasma actuation for suppressing dynamic stall of the wind turbine was also discussed using an originally developing a blade element model based wind turbine performance predicted cord.
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