Abstract: A flow modifying element for a wind turbine blade is provided. The wind turbine blade (10) comprises a blade body (20) having a leading edge (16), a suction surface (18), a pressure surface (19), and a trailing edge (17). The blade body (20) has a chord length c, wherein the leading edge (16) corresponds to a position in chord direction of 0% c and the trailing edge (17) corresponds to a position in chord direction of 100% c. The flow modifying element (30) is configured to be arranged on the pressure surface (19) of the blade body (20) in a range in chord direction between 40% c and 100% c. The flow modifying element (30) is further configured to form a bulge (33) that bulges outwardly from the pressure surface (19) of the blade body (20).

Abstract: The invention describes a wind turbine rotor blade active flap (1) comprising a primary body (1P) adapted for mounting to the trailing edge (20TE) of a wind turbine rotor blade (20); a flap turning means (10, 11, 12) adapted to turn the active flap (1) between a neutral position (R0), in which the active flap (1) directs airflow (A20S, A20P) towards the suction side (P20S) of the rotor blade (20), and a working position (R-Rmax), in which the active flap (1) directs airflow (A20S, A20P) towards the pressure side (P20P) of the rotor blade (20); and a secondary body (1S) mounted to the primary body (1P) and configured to hold the active flap (1) in its neutral position (R0). The invention further describes a wind turbine (2) comprising a number of rotor blades (20) mounted to a hub; and an active flap (1) according to the invention, mounted to the trailing edge (20TE) of each rotor blade (20).

Abstract: The invention describes a wind turbine rotor blade active flap (1) comprising a primary body (1P) adapted for mounting to the trailing edge (20TE) of a wind turbine rotor blade (20); a flap turning means (10, 11, 12) adapted to turn the active flap (1) between a neutral position (R0), in which the active flap (1) directs airflow (A20S, A20P) towards the suction side (P20S) of the rotor blade (20), and a working position (R-Rmax), in which the active flap (1) directs airflow (A20S, A20P) towards the pressure side (P20P) of the rotor blade (20); and a secondary body (1S) mounted to the primary body (1P) and configured to hold the active flap (1) in its neutral position (R0). The invention further describes a wind turbine (2) comprising a number of rotor blades (20) mounted to a hub; and an active flap (1) according to the invention, mounted to the trailing edge (20TE) of each rotor blade (20).