Apparatus and method for the control of trailing wake flows

B - Operations – Transporting – 64 – C

Patent

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B64C 23/06 (2006.01)

Patent

CA 2556699

A system and method for dissipating vortices (22) that form at the wingtips (20) on aircraft (10) and from other airfoils. A jet air stream (62) is discharged in a location at or proximate to the outer end portion (20) of the airfoil (14) into the vortex flow, and the jet air stream (62) is moved cyclically back and forth. The cyclic movement can be at lower or higher frequencies to alleviate at least in part intensity of the vortex (22) or accelerate instability of the vortex (22) which leads to vortex dissipation.

Cette invention se rapporte à un système et à un procédé qui servent à dissiper les tourbillons (22) qui se forment aux extrémités (20) des ailes d'un avion (10) ou provenant d'autres profils aérodynamiques. A cet effet, un courant d'air de réaction (62) est déchargé en un point situé au niveau ou à proximité de la partie terminale externe (20) du profil aérodynamique (14) dans le flux tourbillonnaire, et le courant d'air de réaction (62) est déplacé cycliquement vers l'arrière et vers l'avant. Ce mouvement cyclique peut se faire à des fréquences inférieure ou supérieure, pour réduire au moins en partie l'intensité du tourbillon (22) ou pour accélérer l'instabilité du tourbillon (22), ce qui conduit à sa dissipation.

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