Patent ID: 8757556

Claim:
An aerodynamic body with an aerodynamic surface that creates an aerodynamic contoured surface for a fluid to stream around, and with at least one flow-influencing device to influence the flow of the fluid streaming around the aerodynamic surface, wherein the flow-influencing device comprises: a passage running along a direction of an aerodynamic body thickness and into the aerodynamic body, the passage being configured to periodically aspirate and purge a fluid therethrough, an indentation disposed in the direction of the aerodynamic body thickness between the passage and the aerodynamic contoured surface, the indentation extending along a direction of an aerodynamic body wingspan, wherein the indentation is disposed in a direction of an aerodynamic body wingspan such that the passage is located at an end of the indentation in the direction of the aerodynamic body wingspan, which indentation is formed by a recessed section of the aerodynamic surface beside the passage and by a boundary wall, which boundary wall together with the recessed section defines the indentation wherein the passage is located, in the aerodynamic wingspan direction, between the boundary wall and the recessed section, wherein periodically aspirating and purging of the fluid through the passage generates an asymmetrical flow state providing a swirl in the flow of the fluid streaming around the aerodynamic surface, the swirl being provided over portions of the passage and the indentation, and the swirl having a rotational axis directed along a direction of an aerodynamic body chord.