An experimental study exploring constant blowing as a flow control concept for wind turbine blades was carried out. A NACA 0018 airfoil model equipped with control slots near the leading edge and at mid-chord was investigated initially under quasistatic conditions. In addition, the effect of blowing from the leading-edge slot on the dynamic stall mechanism was explored by means of unsteady surface pressure measurements and particle image velocimetry. Control from the leading-edge slot showed a significant potential for load control applications, allowing for a considerable reduction or increase in lift depending on the momentum coefficient. With a sufficiently high control input, the shedding of the dynamic stall vortex was suppressed.
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