The invention relates to an arrangement (40) comprising a rotor blade (20) of a wind turbine (10), an aerodynamic device (30) and connection means (41) for connecting the aerodynamic device (30) with a trailing edge section of the rotor blade (23). The aerodynamic device (30) comprises an airfoil profile with a pressure side (37), a suction side (38), a trailing edge section (34) and a leading edge section (36). The aerodynamic device (30) is separated from the rotor blade (20) by a slot (42) which is smaller than five centimeters.
STATEMENT REGARDING FEDERALLY SPONSORED DEVELOPMENT
 Development for this invention was supported in part by Contract No. DE-EE0005493, awarded by the United States Department of Energy. Accordingly, the United States Government may have certain rights in this invention.