Surface, exhibiting reduced flow resistance, of a body over whic

Details Surface, exhibiting reduced flow resistance, of a body over whic Surface, exhibiting reduced flow resistance, of a body over whic

1985-10-31

1988-06-28

Barefoot, Galen

Aeronautics and astronautics

Aircraft structure

Details

244200, 244207, B64C 2102, B64C 2110

Patent

active

047534010

ABSTRACT:
The surface of the body is provided with grooves (5), which extend in the flow direction and which are separated from one another by ribs (4) which are constructed to have sharp edges. The surface is composed of a multiplicity of individual elements (3), which have the ribs (4) and grooves (5) on their side facing the flow. The individual elements (3) are disposed relative to one another and/or constructed in such a manner that slits are formed on the side facing the flow between the ribs and grooves. The slits (9) are connected with one another by channels (6) disposed below the surface of the individual elements (3) which faces the flow.

REFERENCES:
patent: 3184185 (1965-05-01), Brocard
patent: 3451645 (1969-06-01), Wolcott
"Grooves Tame Air Turbulence, Boost Aircraft Efficiency", Research and Deopment, Mar. 1984, pp. 74-75.
Browne, "Slippery Skins for Speedier Subs", Discovery, Apr. 1984, pp. 67-71.
Bechert et al., "On the Drag Reduction of the Shark Skin", AIAA 85-0546, Mar. 12-14, 1985.
"Grooves Reduce Aircraft Drag", NASA Tech Briefs, Summer 1980, vol. 5, No. 2.
Bone, "Muscular and Energetic Aspects of Fish Swimming" Swimming and Flying in Nature, vol. 2, pp. 494-528.
Nitschke, MAX-Planck-Institut fur Stromungsforschung, "Exp. Untersuchung der Turb Stromung . . . ", Apr. 1983.

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