Acoustic processing panel, more particularly adapted for an air intake in an aircraft nacelle

An engine compartment and acoustic treatment technology, which is applied in the direction of machine/engine, power plant air intake combustion, thin material treatment, etc., can solve the problems of turbulent flow and destruction of acoustic treatment, etc.
CN102307783AActive Publication Date: 2012-01-04AIRBUS OPERATIONS (SAS)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AIRBUS OPERATIONS (SAS)
Publication Date
2012-01-04

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Abstract

The invention relates to an acoustic processing panel mounted at the air intake of an aircraft nacelle, said panel including at least one acoustically resistive structure (30) and a reflective layer (32), between which are provided, in a direction substantially perpendicular to the longitudinal direction of the nacelle, strips (34) of honeycomb cells spaced apart so as to enable the hot air flow for treating icing, characterised in that it comprises ducts (36) for the hot air, each defined by at least one wall extending from the acoustically resistive layer (30) to the reflective layer (32) so as to insulate said cell strips (34) in the longitudinal direction.
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Description

technical field

[0001] The present invention relates to panels particularly suitable for the acoustic treatment of aircraft nacelle air inlets. Background technique

[0002] Some techniques have been developed to reduce the noise emitted by aircraft, in particular by arranging panels (also known as coverings or structures) at the level of the duct wall with the purpose of absorbing a portion of the acoustic energy, in particular by using Helmholtz resonators The principle of reducing the noise emitted by the entire propulsion device. As is known, panels for acoustic treatment comprise, from the outside to the inside, a porous acoustically resistive layer, at least one honeycomb structure and a reflective or impermeable layer.

[0003] The so-called layer refers to one or several layers with the same or different properties.

[0004] The porous acoustic resistance layer is a porous structure that has a dissipation effect and partially converts the sound energy of the sound ...

Claims

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