Reducing flow-induced resonance in a cavity
US5818947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Nov 15, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R17/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method and system are provided for reducing flow-induced resonance in a structure's cavity. A time-varying disturbance is introduced into the flow along a leading edge of the cavity. The time-varying disturbance can be periodic and can have the same or different frequency of the natural resonant frequency of the cavity. In one embodiment of the system, flaps are mounted flush with the surface of the structure along the cavity's leading edge. A piezoelectric actuator is coupled to each flap and causes a portion of each flap to oscillate into and out of the flow in accordance with the time-varying function. Resonance reduction can be achieved with both open-loop and closed-loop configurations of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.