Patent ID: 8585371

Claim:
A device ( 1 ) for being fixed to an interface ( 3 ) of a wingtip or blade of a wind or marine generator, the device serving to reduce or eliminate marginal swirl, said device comprising: a streamlined body with a side adapted for securing to a tip of a wing or blade ( 2 ) at an interface ( 3 ) thereof; a generally cylindrical hollow part merging with the streamlined body on another side thereof and defining a cylindrical channel having an ovoid inlet ( 9 ) with an upstream beveled portion; the streamlined body having a leading edge protruding into the upstream beveled portion of the ovoid inlet, the leading edge being shaped to induce a COANDA effect at the ovoid inlet, the leading edge terminating at a point ( 7 ) substantially coinciding with a downstream end of the beveled portion of the ovoid inlet ( 9 ); and at least one helicoidal slot ( 8 ) in said cylindrical hollow part allowing ejection of fluid toward an exterior of said cylindrical hollow part.