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AssigneeAirbus France
InventorsAlexandre Corjon, Thomas Leweke, Florent Laporte
Estimating the term…
A device for accelerating the destruction of contra-rotating vortices formed at the rear of wings of a moving body by the merging of at least two co-rotating eddies includes, on each of the wings, at least one perturbator which is positioned in the vicinity of the area of creation of one of the co-rotating eddies associated with the wing. Each of the perturbators generates a periodic perturbation of the flow, which has a wavelength capable of exciting at least one of the instability modes of the corresponding eddy in such a way as to increase the core of the contra-rotating vortex which is created from this eddy, in such a way that the diameter of the core becomes greater than a predetermined proportion of the inter-vortex distance.
A process for accelerating destruction of at least two contra-rotating vortices which are created, respectively, in the wake of the wings of a moving body having at least two wings, where each wing has at least two lifting surfaces, and which are separated from each other by an inter-vortex distance, each of said contra-rotating vortices being formed at the rear of the corresponding wing by the merging of at least two co-rotating eddies which are created by the arrangement of said lifting surfaces of the wing, each of said co-rotating eddies having a plurality of core instability modes, said method comprising:
A device for a moving body having at least two wings, where each wing has at least two lifting surfaces, for accelerating the destruction of a pair of contra-rotating vortices which are created, respectively, in the wake of said wings of the moving body and which are separated from each other by an inter-vortex distance, each of said contra-rotating vortices being formed at the rear of the corresponding wing by the merging of at least two co-rotating eddies which are created, respectively, by the arrangement of said lifting surfaces, each of said co-rotating eddies having a plurality of instability modes, said device comprising, on each of said wings, at least one perturbation means which is positioned in the vicinity of the area of creation of one of said co-rotating eddies associated with the wing, wherein each of said perturbation means is operable to generate a periodic perturbation of the flow that corresponds to a Benard-von Karman instability, which has a wavelength operable to excite at least one of said instability modes of the corresponding eddy in such a way as to increase the core of the contra-rotating vortex which is created by the unstable merging of this eddy with the other eddy in such a way that the diameter of said core becomes greater than a predetermined proportion of said inter-vortex distance.
Dependencies are inferred from the claim text.