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Method of manufacturing a sound absorbing panel

A technology of sound-absorbing panels and compartments, which is applied in the field of manufacturing sound-absorbing panels, which can solve problems such as the performance degradation of sound attenuation devices and the difficulty of integrating sound attenuation devices, and achieve the effect of small acoustic performance and small changes

Inactive Publication Date: 2014-09-03
AIRCELLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, first of all, the performance of the sound attenuation device is drastically reduced due to the arrangement of passages for the passage of hot pressurized fluid in the air inlet lip, the sound treatment surface is reduced
Then, the integration of the sound attenuation device is difficult to accomplish as it requires channels for thermal fluid communication between the two honeycomb core structures

Method used

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  • Method of manufacturing a sound absorbing panel
  • Method of manufacturing a sound absorbing panel
  • Method of manufacturing a sound absorbing panel

Examples

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Embodiment Construction

[0045] Throughout the drawings, the same or similar reference numerals refer to the same or similar structures or groups of structures.

[0046] Furthermore, in this specification, the terms "upstream", "midstream" and "downstream" are used to refer to sections of the nacelle, the upstream section corresponding to the upstream leading edge of the nacelle, and the downstream section corresponding to at the rear edge of the nacelle.

[0047] figure 1 A schematic diagram partially shows the upstream section of a nacelle 1 for a turbojet engine of an aircraft. This upstream section comprises the air intake lip 3 of the nacelle 1 , on the outside 5 of which is provided a sound-absorbing panel 7 for acoustically damping the noise and vibrations generated by the turbojet engine of said aircraft.

[0048] It is known that an acoustic panel comprises at least one set of acoustic cells to provide sound treatment, on its inner surface 11 is mounted an inner wall 12 and on its outer sur...

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Abstract

The invention relates to a method of manufacturing a sound absorbing panel (107) according to which a reflective wall (112) is added to at least one part of one of the faces (111, 113) of a set of sound absorbing cells. The method according to the invention is remarkable in that at least one passage (118) on one portion of the thickness (E) of said assembly is formed on the face (111, 113) opposite said one of the faces (111, 113), said passage (118) forming at least one main communication channel (119) between the cells and is intended for the circulation of a deicing fluid.

Description

technical field [0001] The present invention relates to a method of manufacturing an acoustic panel. The invention also relates to the sound-absorbing panel obtained by said manufacturing method. The invention further relates to a nacelle for an aircraft turbojet engine comprising a sound-absorbing panel obtained by the production method according to the invention. Background technique [0002] Aircraft turbojet engines produce significant noise pollution. As the turbojet engines used become more and more powerful, there is a strong need to reduce this pollution. The design of the nacelle surrounding the turbojet engine contributes significantly to reducing this noise pollution. [0003] In order to further improve the acoustics of the aircraft, the nacelle is equipped with sound-absorbing panels, with the aim of reducing the transmission of the noise generated by the turbojet engine. [0004] Usually, such acoustic panels are installed on the nacelle surrounding the tur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C1/40B64D15/04
CPCB64D33/02B64D2033/0233B64D2033/0206G10K11/20B64D29/00B64D15/04B64D15/00Y10T156/10Y10T156/1003
Inventor 埃尔韦·于尔兰皮埃尔·卡吕埃勒
Owner AIRCELLE
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