Bodies with reduced base drag
US4789117A · kind A · utility
39Cited by
10References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1986 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Dec 29, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C23/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A body adapted to move downstream through a fluid has a downstream extending smooth surface terminating at a blunt base. A plurality of adjacent U-shaped, downstream extending troughs in the smooth surface intersect the blunt base to form trough outlets. The troughs are appropriately spaced apart, sized and configured to flow full over their entire length and cause fluid to flow into the space immediately behind the blunt base, thereby reducing base drag on the body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.