Patent ID: 6789769
Filing Date: 2004-09-14
Classification: B64C

Abstract:
In an aircraft including a wing arrangement, wherein said wing arrangement includes a wing body and a slat, said wing body terminates forwardly in a forward nose of said wing body, said slat has a concave rear surface facing toward said forward nose, and said slat is movably connected to said wing body to be movable between a retracted slat position in which said slat is adjacent to said forward nose with said concave rear surface facing and adjacent to said forward nose and an extended slat position in which said slat is spaced away from said forward nose with a slat air gap bounded between said slat and said forward nose,an improvement for reducing aero-acoustic noise generated by said wing arrangement, wherein said improvement comprises: an airflow separation surface comprising a plurality of bristles arranged as at least one row of said bristles distributed in a span direction along and protruding from at least one of an upper rear edge of said slat and a lower rear edge of said slat, wherein said bristles are sufficiently flexible so as to be flexibly self-contouring due to aerodynamic forces of air flowing through said slat air gap during flight of said aircraft with said slat in said extended slat position.