Ships – Building – Antifriction surfaces
Patent
1985-09-12
1987-09-15
Brown, David H.
Ships
Building
Antifriction surfaces
114290, 244130, 244208, B61D 3500
Patent
active
046932011
ABSTRACT:
A low drag surface construction utilizes a plurality of longitudinally extending, parallel, spaced apart linear vortices extending transversely of the free stream to reduce drag between the free stream and the surface. The surface is provided with stabilizing means which retains the vortices in their relationship with one another but causes them to traverse the surface in the same direction as the free stream but at approximately half the speed. The stabilizing produces a regular variation in boundary flow across the surface and may comprise dynamic means such as sequenced jets of fluid escaping from apertures in the surface.
REFERENCES:
patent: 2318789 (1943-05-01), Lombardini
patent: 2361071 (1944-10-01), Vang
patent: 2742247 (1956-04-01), Lachmann
patent: 2783008 (1957-02-01), Bodine
patent: 2899150 (1959-08-01), Ellis
patent: 2946541 (1960-07-01), Boyd
patent: 4214722 (1980-07-01), Tamura
patent: 4434957 (1984-03-01), Moritz
Lang Jack
Williams John E. F.
Brown David H.
Rolls-Royce plc
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