Method of and apparatus for enhancing Coanda flow attachment over a wing and flap surface
US4019696A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1975 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | Aug 28, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of enhancing Coanda flow attachment over a wing and flap surface of an upper surface blowing aircraft comprising the step of directing the jet exhaust flow or stream toward regions wherein the exhaust flow separates from the wing and flap surface so as to create an outward velocity component which prevents ambient air from flowing in and under the exhaust from the sides of the exhaust flow and causing such separation is disclosed. The method comprises the further step of creating vortices also having outward velocity components on the wing and flap surface. The outward velocity components of the vortices further increases the sidewise velocity component on the wing surface. In addition, the rotational velocity components of the vortices scrub the boundary layer air from the flap surface to further promote flow attachment. Apparatus suitable for carrying out the method and comprising a plurality of airfoil shaped vortex generating vanes located between the engine exhaust and the trailing edge of the flap is also disclosed. The vortex generating vanes direct the exhaust stream toward the separation regions and create the outward velocity component vortices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.