Airfoil acoustic impedance control
US7607287B2 · kind B2 · utility
37Cited by
32References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 2007 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Aug 28, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/963
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A noise control cassette for a gas turbine engine includes a perforated face sheet configured for exposure to an airflow, a non-perforated backing sheet, a core arranged between the face sheet and the backing sheet and defining a cavity between the face sheet and the backing sheet having an effective length tuned so as to provide acoustic reactance control, and an attachment face for attaching the cassette to an airfoil-shaped structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.