Lifting surface with improved separation behaviour under strongly variable angle of incidence

摘要

The surface has a variable blade angle (4) to an incidence flow and devices that are provided in a region of a profile front edge (2) of surface. The devices include a passive eddy generator (3) that is arranged at or near a retaining point of the surface with low blade angle. The eddy generator is functionless at low blade angle and steps out with increased blade angle from a boundary layer of a flow on a suction side of the surface. An independent claim is also included for a rotary-wing aircraft with a lift surface.