Acoustic lining for an aircraft, including a frost treatment system using the joule effect

A technology for processing systems and aircraft, applied in the direction of instruments, sound-generating devices, aircraft parts, etc., can solve problems such as damage, accumulation, and unsatisfactory systems

Inactive Publication Date: 2010-01-06
AIRBUS OPERATIONS (SAS)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of system is unsatisfactory because it is relatively fragile and can be easily damaged by the impact of birds, hail and accidents during maintenance
In damaged areas, the frost handling system may no longer function, which may allow ice or frost to form and build up
Finally, it is not compatible with noise treatment acoustic underlayment, laying this frost treatment system on the surface will generally impair the performance of noise treatment

Method used

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  • Acoustic lining for an aircraft, including a frost treatment system using the joule effect
  • Acoustic lining for an aircraft, including a frost treatment system using the joule effect
  • Acoustic lining for an aircraft, including a frost treatment system using the joule effect

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Embodiment Construction

[0042] According to the description below, the invention is applied to the air intake of an aircraft propulsion device. However, the invention can also be applied to other leading edges of aircraft that have been deiced and sound dampened.

[0043] In the following description, the so-called frost refers to ice and frost of various properties, structures and thicknesses.

[0044] figure 1 The propulsion device 10 of the aircraft is shown, which is connected under the wing by struts 12 . However, the propulsion device can also be connected to other regions of the aircraft.

[0045] The propulsion means comprise a nacelle 14 in which is fitted approximately concentrically a power plant for driving an air intake mounted on a main shaft 16 . The longitudinal axis of the nacelle is indicated with reference numeral 18 . The nacelle 14 includes an inner cavity wall 20 that defines an air inlet 22 at the front end, a first portion of the incoming airflow (also referred to as the m...

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PUM

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Abstract

The invention relates to acoustic lining for an aircraft, which can cover a leading edge, such as an air inlet in the nacelle of a propulsion unit, said lining comprising: from the inside outwards, a reflective layer (28), at least one cellular structure (30) and an acoustically resistive structure (32) having a pre-determined proportion of open surface; and at least one frost treatment system in the form of at least one heating layer (46) comprising open zones through which acoustic waves can pass, which co-operate at least partially with the open zones in the acoustically resistive structure. The invention is characterized in that the acoustically resistive structure (32) includes at least one structural layer (36) with openings (38) and in that said at least one heating layer (46) is disposed under the structural layer (36).

Description

technical field [0001] The present invention relates to a sound-absorbing mat with a Joule-effect frost treatment system for an aircraft, mainly for covering the leading edge of the aircraft and the air intakes of the aircraft nacelle. Background technique [0002] The propulsion system of the aircraft consists of a nacelle in which the power plant is mounted in a generally concentric manner to drive the air intake mounted on the main shaft. [0003] The nacelle has an inner cavity wall that defines the intake duct at the front. The first part of the airflow (also called the primary airflow) passes through the engine to participate in the combustion process, and the second part of the airflow (also called the secondary airflow) is subjected to The air intake is guided into an annular duct formed by the inner wall of the engine compartment and the outer wall of the power plant. [0004] On the one hand, the noise emitted by the propulsion system includes jet noise, that is, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D33/02B64D15/12B64D15/16F02C7/045G10K11/172B64C1/40
CPCB64D2033/0286Y02T50/672G10K11/172B64D15/12F05B2260/96B64D2033/0233F02C7/045F05D2260/96B64D2033/0206F02C7/047B64D15/163B64D33/02Y02T50/60
Inventor 吉勒·谢纳法布里斯·冈蒂耶阿兰·波特
Owner AIRBUS OPERATIONS (SAS)
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