LOW DRAG SURFACE CONSTRUCTION
Assignee
ROLLS-ROYCE LIMITED, A BRITISH COMPANY
Filed
Sep 12, 1985
Granted
Sep 15, 1987
Location
Cambridge MA (Draper Lab/MIT)
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.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Aug 29, 1986
Rescinded
Feb 19, 1987
Duration
5 months
Inventor
- 1JOHN E. FFOWCS WILLIAMS
Sensitive facility: Cambridge MA (Draper Lab/MIT)
Record Details
- Patent number
- US 4693201
- Application
- 06796945
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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