F - Mech Eng,Light,Heat,Weapons – 15 – C
Patent
F - Mech Eng,Light,Heat,Weapons
15
C
170/63.18
F15C 1/18 (2006.01) B64C 23/06 (2006.01)
Patent
CA 2014014
LOW DRAG VORTEX GENERATORS ABSTRACT A generally V-shaped device (40) that is installed on a surface (48) over which there is a flowing medium (50) whose viscosity causes a boundary layer to form between free-stream medium and the surface. The point (46) of the V shape generator (40) is oriented facing the down stream direction. Usually a plurality of generators (40) are positioned in a line crosswise to the flow spaced so that the vortices created thereby do not interfere. Flow between the arms (42 and 44) of each generator (40) generates a pair of counterrotating vortices (64 and 68) with diameters (66) much larger than the height of the generator to provide stronger flow control with less parasitic drag than prior art vortex generators. The height of the generator (40) is usually less than the height of the local boundary layer (73), but may extend above the boundary layer (73) especially when the generator (40) is use to control spanwise flow or to reduce tip vortices.
Smart & Biggar
Wheeler Gary O.
LandOfFree
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