Active device for attenuating acoustic emissions for a turbojet engine including controlled turbines
US11401866B2 · kind B2 · utility
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32References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 8, 2020 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Sep 8, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/121
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An active device for attenuating the acoustic emissions of an aircraft turbojet engine includes circulation conduits for a pressurized air flow rate supplying rotary elements each having a pulsation system for the delivered air. The rotary elements are controlled in amplitude and phase and deliver, to outlet diffusers, a pulsed air flow rate with a pulsation at the frequency of the noise to be attenuated having an amplitude and a phase adjusted according to a local feedback law with microphones to attenuate the radiated acoustic power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.