Low drag surface
US4955565A · kind A · utility
7Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1984 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Sep 20, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A low drag surface comprises at its upstream edge, an intermittent linear vortex producing means which extends transverse to the flow over the surface and produces a succession of rolling vortices extending transverse to said flow. The vortices move across the surface and reduce drag in the manner of roller bearings. In preferred embodiments the vortex producing means is mechanical, in the form of an oscillating part or fluid dynamic, in the form of a nozzle arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.