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.
