Turbomachine nozzle cover provided with triangular patterns having a point of inflexion for reducing jet noise
US7581384B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2007 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Feb 27, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2250/184
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to an annular cover for a turbomachine nozzle, the cover having a plurality of patterns extending a trailing edge of said cover and spaced apart circumferentially from one another, each pattern having an outline that is substantially triangular in shape, with a base formed by a portion of the trailing edge of the cover and a vertex spaced downstream from the base and connected thereto by two sides. For each pattern, the vertex presents an outline that is substantially curved; each side is connected to the trailing edge of the cover following an outline that is substantially curved having a radius of curvature that is greater than the radius of curvature of the outline of the vertex; and the outline of each of the sides includes at least one point of inflexion having a tangent that is substantially parallel to the base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.