System for reducing aerodynamic noise at a supplementary...

Details System for reducing aerodynamic noise at a supplementary... System for reducing aerodynamic noise at a supplementary...

B - Operations, Transporting

64

C

B64C 3/50 (2006.01) B64C 9/14 (2006.01)

Patent

CA 2590525

An arrangement for reducing aerodynamic noise at a supplementary aircraft wing (1; 11) hinged to a main wing (2) and extendable after a gap (9) between the main wing (2) and the supplementary wing (1) has been opened, comprises a separating surface (6; 7) which, when the supplementary wing (1; 11) is extended, can be moved into the gap (9) and extends at least partially along a separating flow line (13) between an eddy current region (12) and an air flow line (10) in the gap (9) between the supplementary wing (1; 11) and the main wing (2). According to the invention, the separating surface (6; 7) is an n- stable surface which can be moved by an actuator system (3; 3a, 3b; 4; 4a, 4b; 5; 5a, 5b) between at least one of the stable states and at least one additional state.

Configuration permettant de réduire le bruit aérodynamique d'une aile auxiliaire (1; 11) d'avion qui est articulée sur une aile principale (2) et qui peut être déployée par libération d'une zone de fente (9) entre l'aile principale (2) et l'aile auxiliaire (1). Ladite configuration comporte une surface de séparation (6; 7) qui peut déplacée dans la zone de fente (9) lorsque l'aile auxiliaire (1; 11) est déployée et qui s'étend au moins partiellement le long d'une ligne de séparation (13) de courants entre une zone à courants tourbillonnaires (12) et un courant d'air (10) circulant dans la zone de fente (9) entre l'aile auxiliaire (1; 11 ) et l'aile principale (2). Selon la présente invention, la surface de séparation (6; 7) est une surface n-stable qui peut être déplacée au moyen de dispositifs actionneurs (3; 3a, 3b; 4; 4a, 4b; 5; 5a, 5b) entre au moins un des états stables et au moins un autre état.

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