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Acoustic skin for an aircraft nacelle acoustic panel

An acoustic surface layer and acoustic board technology, which is applied in the direction of machines/engines, instruments, mechanical equipment, etc., can solve the problems of health hazards for operators, reduced mechanical strength, and high fiber waste, so as to reduce costs, control manufacturing costs, reduce costs, etc. Effect of small material loss

Inactive Publication Date: 2012-09-12
AIRCELLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, a reduction in mechanical strength due to breakage of some fibers
[0011] Furthermore, the perforation step usually carried out results in a substantial loss of material in the finished skin, which can amount to as much as 40% of the total material
As a result, the amount of wastage of fibers is very high, which necessitates the provision of large quantities of material
Furthermore, since dust is hazardous to the health of the operator, it is necessary to install restrictive specific protective devices (such as vacuum cleaners)

Method used

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  • Acoustic skin for an aircraft nacelle acoustic panel
  • Acoustic skin for an aircraft nacelle acoustic panel
  • Acoustic skin for an aircraft nacelle acoustic panel

Examples

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Embodiment Construction

[0049] according to figure 1In the embodiment shown in , the nacelle 1 according to the invention comprises an upstream air intake structure 2 , an intermediate structure 3 surrounding a fan 4 of a turbojet engine 5 , and a downstream structure. This downstream structure comprises, in a known manner, an outer structure 6 (referred to as OFS) and an inner structure 9 (referred to as IFS) housing thrust reversers 8 . The nacelle 1 according to the invention is fastened downstream using any suitable means, in particular connecting rods, to a suspension pylon (not shown) for fastening the nacelle 1 under the wing of the aircraft.

[0050] The outer structure 6 and the inner structure 9 also define an annular flow channel.

[0051] The inner structure 9 serves to cover the downstream part of the turbojet 5 extending downstream of the fan.

[0052] Certain parts of the nacelle 1 according to the invention must be arranged so as to attenuate the noise produced by the turbojet engin...

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Abstract

The invention relates to an acoustic skin (22) for an aircraft nacelle acoustic panel, said skin including a plurality of layers (105, 106) stacked with composite planar bands (102) that are each directed by the direction-defining longitudinal axis (107) thereof, the longitudinal axes (107) of the bands (102) of a single layer (105, 106) being parallel therebetween, said bands (102) of said single layer (105, 106) being spaced from each other so as to have acoustic openings within the acoustic skin. The invention also relates to a panel including such a skin, to a method for manufacturing said skin, and to a drape-forming head for implementing the method.

Description

technical field [0001] The invention relates to an acoustic skin for an acoustic panel of an aircraft nacelle. [0002] The invention also relates to an acoustic panel comprising such a skin, a method of manufacturing such a skin and a draping head for carrying out such a method. Background technique [0003] Aircraft jet engines produce enormous noise pollution. Especially since the jet engines used are becoming more and more powerful, there is a high need to reduce this pollution. The design of the nacelle that surrounds the jet engine helps to reduce this noise pollution to a large extent. [0004] In order to further improve the acoustic performance of the aircraft, the nacelle is equipped with acoustic panels for attenuating the noise produced by the jet engines. [0005] Acoustic panels are well known sandwich type panels for absorbing noise. These panels generally comprise one or more layers of a cellular core structure (commonly referred to as a "honeycomb" struc...

Claims

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Application Information

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IPC IPC(8): G10K11/172F02C7/045B32B3/12
CPCB32B3/14B32B3/18B32B2307/102B32B2605/18F02C7/045F02K1/827G10K11/172F05D2300/603Y10T156/1702Y02T50/60B29C70/202
Inventor 伊曼纽尔·德勒冯吉恩·拉曼奥蕾利安·蒂索特
Owner AIRCELLE
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