Engine inlet varying impedance acoustic liner section
US8863893B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2012 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Jan 8, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64D2033/0206
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An inlet for an aircraft engine nacelle having an acoustic barrel panel, a septum buried or sandwiched within the acoustic barrel panel, and a perforated face sheet. The inlet may be located forward of an engine and/or an engine fan housed within the aircraft engine nacelle. Both the septum and the perforated face sheet may have perforations or holes therein of varying sizes and varying distances apart from each other. The smaller the area of the perforations or holes and the further apart they are from each other, the higher the impedance of a given area of the septum or the perforated face sheet. The impedance of the septum and/or the perforated face sheet may progressively increase in a direction away from the engine fan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.