Vortex generator for a wind turbine rotor blade

A vortex generator for a wind turbine rotor blade, the vortex generator comprising:

• a base plate arranged in a base plate plane and having a lower surface configured for being mounted to an outer surface of the wind turbine rotor blade, an upper surface opposite the lower surface, a front edge, and a rear edge;
• said base plate defining a longitudinal axis;
• said rear edge of the base plate including a perpendicular section arranged perpendicular to the longitudinal axis;
• at least one plate-shaped fin having a first longitudinal section arranged at said upper surface of the base plate and a second longitudinal section extending beyond said rear edge and having a lower edge which is not connected to said base plate;
• said first longitudinal section including a rear part arranged rearwards of said perpendicular section;
• said base plate including a first stiffening section arranged rearwards of said perpendicular section and forming a transition to said rear part;
• said first stiffening section having a concavely curved edge leading from said perpendicular section to a rear end of said rear part;
• said concavely curved edge having a radius of curvature and said at least one plate-shaped fin has a maximum height;
• and,
• said radius of curvature being in a range of 30% to 100% of said maximum height.

A wind turbine rotor blade comprising:

• a wind turbine rotor blade body having a rotor blade outer surface;
• at least one vortex generator including a base plate arranged in a base plate plane;
• said base plate having a lower surface configured for being mounted to an outer surface of the wind turbine rotor blade, an upper surface opposite the lower surface, a front edge, and a rear edge;
• said base plate defining a longitudinal axis;
• said rear edge of the base plate including a perpendicular section arranged perpendicular to the longitudinal axis;
• said at least one vortex generator further including at least one plate-shaped fin having a first longitudinal section arranged at said upper surface of the base plate and a second longitudinal section extending beyond said rear edge and having a lower edge which is not connected to said base plate;
• said first longitudinal section including a rear part arranged rearwards of said perpendicular section;
• said base plate including a first stiffening section arranged rearwards of said perpendicular section and forming a transition to said rear part;
• and,
• said at least one vortex generator being mounted on said rotor blade outer surface.