The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 2022
Filed:
Sep. 08, 2020
Active device for attenuating acoustic emissions for a turbojet engine including controlled turbines
Safran Nacelles, Gonfreville l'Orcher, FR;
Jean-Paul Rami, Gonfreville l'Orcher, FR;
Hervé Hurlin, Gonfreville l'Orcher, FR;
Jean-Baptiste Goulard, Gonfreville l'Orcher, FR;
Marc Versaevel, Moissy Cramayel, FR;
Philippe Micheau, Gonfreville l'Orcher, FR;
Julien Drant, Gonfreville l'Orcher, FR;
Ambre Allard, Gonfreville l'Orcher, FR;
Alain Berry, Gonfreville l'Orcher, FR;
Raymond Robert, Gonfreville l'Orcher, FR;
Safran Nacelles, Gonfreville l'Orcher, FR;
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.