Apparatus for reducing turbulent drag
AssigneeMesserschmitt-Boelkow-Blohm GmbH
InventorGerhard Loebert
Life of this patent
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Abstract
The turbulent drag is reduced on the surface of a body moving through a fluid by providing longitudinal channels in the surface, for example of an aircraft wing, which channels extend in parallel to the flow direction and which channels are interconnected with the boundary layer by a longitudinal gap communicating the channel with the boundary layer.
Claims6
An apparatus for reducing turbulent drag caused on a surface of a body by relative movement between said body and a fluid, said movement defining a given movement direction, comprising a surface zone in said body adjacent to said body surface in direct contact with said fluid, a plurality of longitudinal channels inside said surface zone, said channels extending in parallel to each other and in parallel to said given movement direction, each channel comprising a longitudinal gap in said body surface communicating the respective channel with a boundary layer of said fluid on said body surface, said channels having an internal width (b, b') which is within the range of about 0.5 to 10 mm to be sufficiently small for assuring a laminar pipe flow inside said longitudinal channels, said longitudinal gaps having a width (s) which has a determined ratio to said sufficiently small internal channel width (b, b'), such that said ratio is smaller than or equal to 1.
Dependencies are inferred from the claim text.