Wall with a drag reducing surface and method for making such a w

Details Wall with a drag reducing surface and method for making such a w Wall with a drag reducing surface and method for making such a w

1988-04-07

1990-03-13

Barefoot, Galen

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244130, B64C 2110

Patent

active

049077651

ABSTRACT:
A wall having a surface in contact with a fluid, has a surface configuration which reduces drag if there is relative movement between the surface and the fluid. The wall is made of metal or of fiber composite material in such a way that sharp edged or fine ridges and grooves between the ridges are formed as integral surface components of the wall structure for simplifying the construction, reducing the weight, and increasing the useful life of structures having such walls.

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patent: 2927022 (1960-03-01), Martin et al.
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patent: 3902944 (1975-09-01), Ashton et al.
patent: 4060016 (1977-11-01), Gerber
patent: 4320188 (1982-03-01), Heinz et al.
patent: 4323637 (1982-04-01), Chen et al.
patent: 4430417 (1984-02-01), Heinz et al.
patent: 4750693 (1988-06-01), Lobert et al.
Research & Development, Mar. 1984, pp. 74-75.
AIAA'83, AIAA-83-0227, "Turbulent Drag Reduction of External Flows" D. M. Bushnell, NASA Langley Research, Jan. 10-13, 1983.
Deutsche Normen, May 1976, DIN 61 850.
NASA Tech Briefs, Summer (1980), "Grooves Reduce Aircraft Drag" M. J. Walsh, Langley Research Center.
Mikromechanik aus Silizium by James B. Angell et al., Spektrum der Wissenschaft, Jun. 1983, p. 40.
Lasertechnic, an Introduction by W. Brunner et al., published by Dr. Alfred Huechtig, 1984.
Laser und Optoelektronik, Nr. 1, 1986, by H. Vogt et al., p. 49.

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