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.

Active Publication Date: 2012-01-04
AIRBUS OPERATIONS (SAS)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] This embodiment did not give sufficiently satisfactory results because the presence of drainage systems combined with systems for frost treatment with hot air tended to destroy the acoustic treatment and create turbulence at the level of the air flow entering the engine compartment

Method used

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

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Embodiment Construction

[0026] exist figure 1 Above, the entire propulsion device 10 of the aircraft is shown connected under the wing by means of wing struts 12 . But this whole propulsion unit can be connected to other areas of the vehicle.

[0027] This whole propulsion unit consists of a nacelle 14 in which is arranged substantially concentrically a motor driving a fan (nacelle booster) mounted on its shaft 16 . In the present description, the longitudinal direction corresponds to the reference axis 18 of the nacelle. The plane perpendicular to the longitudinal direction is called the cross-sectional plane.

[0028] The nacelle 14 comprises a wall 20 delimiting at the front a duct with an air inlet 22, the first part of the incoming air flow, called the main air flow, driven by the ventilator (nacelle booster), penetrates the motor so as to participate in The second part of the combusted air flow, called the secondary air flow, exits in the annular duct defined by the inner wall 20 of the nace...

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PUM

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D15/04B64D33/02F02C7/045F02C7/047
CPCB64D15/04F02K1/827B64D33/02B64D2033/0206F02C7/047B64D2033/0233F02C7/045Y10T137/0536
Inventor 弗雷德里克・谢兰蒂埃里・叙尔普尔伊多米尼克・阿罗法布里斯・冈蒂耶达维德・朗贝尔
Owner AIRBUS OPERATIONS (SAS)
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