Acoustic Panel De-Icing Channel Fabrication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing panels for acoustic treatment with frost treatment capabilities face challenges in assembly complexity, inefficient acoustic performance due to large perforations, and difficulty in achieving a satisfactory seal between honeycomb ducts and channels, particularly on non-flat and complex surfaces.
Innovation Solution
A method involving the deformation of a layer to create grooves, flattening, and securing it to an acoustically resistive layer to form channels, with subsequent material removal to optimize thickness and simplify assembly, while ensuring a secure connection using techniques like diffusion welding to seal channels and honeycomb structure ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two sheets are superimposed to form channels with grooves, then the assembly mode is simplified, but the perforations have relatively large length which impacts acoustic treatment efficiency
Solution Approach 1:
The patent extracts the problematic intermediate layer with grooves from the assembly, replacing it with a single sheet that has channels formed by removing material between perforations. This eliminates the large-length perforations created by superimposing two sheets while maintaining the simplified assembly advantage.
2Reliability
If strips of material are used to delimit channels, then acoustic treatment operation is maintained, but the installation time is relatively long especially for sealing edges
Solution Approach 1:
The patent merges the channel-delimiting function and the acoustic treatment function into a single integrated structure. The walls formed by removing material between perforations serve both to delimit channels and to maintain acoustic treatment, eliminating the need for separate strips and their time-consuming sealing operations.
3Ease of manufacture
If material is removed to eliminate layer thickness between channels, then assembly is simplified and acoustic performance is enhanced, but the sealing between honeycomb ducts and channels becomes more critical
Solution Approach 1:
The patent performs preliminary actions to ensure sealing success: the channels are formed with precise dimensions and positions before honeycomb assembly, and the walls are designed with appropriate thickness and geometry to facilitate reliable sealing when the honeycomb structure is attached, thereby enabling assembly simplification without compromising sealing quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies assembly, enhances acoustic treatment performance, and achieves a high-performance panel for both acoustic and frost treatment by ensuring a secure and efficient seal, even on complex surfaces, thereby improving defrosting efficiency and reducing noise pollution.
Implementation Method 1
deforming a layer (34) in order to obtain grooves (36) at one of its faces, in flattening and securing said deformed layer
Implementation Method 2
securing said deformed layer to the acoustically resistive layer so as to delimit the channels
Implementation Method 3
removing material so as to eliminate at least part of the thickness of the layer in which the grooves between the channels are formed
Implementation Method 4
securing it to the acoustically resistive layer so as to delimit the channels, with subsequent material removal to optimize thickness and simplify assembly, while ensuring a secure connection using techniques like diffusion welding to seal channels and honeycomb structure ends
Implementation Method 5
a method for producing a panel for acoustic treatment capable of being attached to the level of a surface of an aircraft... integrating the function of treating frost with hot air
Data Source
Figure 1~2
Figure 3A~3D
Figure 4A~5B
AI summary
The object of the invention is a method for manufacturing a panel for acoustic treatment suitable for application to an aircraft surface, particularly to a leading edge such as an air intake of an aircraft nacelle. The panel comprises an acoustically resistive layer (24), at least one honeycomb structure (26), and a reflective layer (28), as well as channels (30) placed between the honeycomb structure (26) and the acoustically resistive structure (24). Each channel is delimited by a wall (32). The method consists of deforming a layer to create grooves on one of its faces, and then bonding and securing the deformed layer (34) to the acoustically resistive layer to define the channels (30). The method is characterized in that it involves removing material to eliminate at least a portion of the thickness of the layer (34) in which the channels are formed. furrows between the channels (30),prior to the assembly of the alveolar structure (26).,