Acoustically resistive layer for a sound attenuation panel,...

F - Mech Eng,Light,Heat,Weapons – 02 – C

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F02C 7/24 (2006.01) F02C 7/045 (2006.01) F02K 1/82 (2006.01) G10K 11/16 (2006.01)

Patent

CA 2439555

The object of the invention is an acoustically resistive layer for an acoustic attenuation panel (22) forming a conduit in which there is an aerodynamic flow (18), adapted particularly for an aircraft turbo jet engine, said panel comprising at least one acoustically resistive layer (24), at least one porous structure (26) and a reflector (28) disposed opposite the incident wave, characterized in that said acoustically resistive layer (24) is constituted by strips (30) disposed in the direction of said flow (18), interconnected by a plurality of splints (32) ensuring the absorption of force, particularly radially, said splints (32) having very small surfaces ensuring the continuity of the homogeneous character of the quantity of open surface of the acoustically resistive layer thus formed.

- L'objet de l'invention est une couche acoustiquement résistive pour panneau d'atténuation acoustique (22) formant un conduit dans lequel est susceptible de s'écouler un flux aérodynamique (18), destiné notamment à un turboréacteur d'aéronef, ledit panneau comprenant au moins une couche acoustiquement résistive (24), au moins une structure alvéolaire (26) et un réflecteur (28) disposé à l'opposé de l'onde incidente caractérisée en ce que ladite couche acoustiquement résistive (24) est constituée de bandes (30) disposées selon le sens d'écoulement dudit flux (18), reliées entre elles par une pluralité d'éclisses (32) assurant la reprise des efforts, notamment radiaux, lesdites éclisses (32) ayant des surfaces très faibles assurant la continuité du caractère homogène du taux de surface ouverte de la couche acoustiquement résistive ainsi formée.

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