Foils

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 23/06 (2006.01) B64C 3/10 (2006.01)

Patent

CA 2181257

A method of reducing the effects of induced drag on a foil. A foil (10) is provided with a series of steps (15, 17) along its span in the trailing edge, whereby a series of spaced vortices (19, 20, 21) are generated. The spanwise spacing of the steps (15, 17) is selected so that the vortices (19, 20, 21) are prevented from combining into a larger vortex at least until the aerodynamic effect of the larger vortex on the foil is insignificant.

L'invention se rapporte à un procédé de réduction des effets de traînée secondaire sur une aile. Une aile (10) est pourvue d'une série d'épaulements (15, 17) le long de son envergure au niveau du bord de fuite, par lequel une série de tourbillons espacés (19, 20, 21) sont générés. L'écartement des épaulements (15, 17), suivant l'envergure, est déterminé de façon à empêcher que les tourbillons (19, 20, 21) s'intègrent dans un tourbillon plus important au moins jusqu'à ce que l'effet aérodynamique du plus grand tourbillon sur l'aile devienne insignifiant.

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