Vented Leading-Edge Assembly Segmentation for Bleed Air Distribution
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Solution Overview
Problem
The manufacturing of vented leading-edge assemblies for aircraft wings is complex and costly due to the need for intricate milling to create channels for bleed air distribution, which complicates the production cycle and increases costs.
Innovation Solution
The vented leading-edge assembly features channel sidewalls that are separate elements from the slat and spar, with the spar acting as a lower channel wall, allowing for simplified production by avoiding integral milling and enabling high-rate, cost-effective manufacturing. These channels can be formed using perforated strips or combs, which are easily produced and mounted between the spar and top skin, ensuring efficient airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If intricate milling is used to create channels for bleed air distribution, then the channels can be integrated into the slat structure, but the production cycle becomes longer and costs increase
Solution Approach 1:
The channel structure is segmented into separate components: channel sidewalls that are independently manufactured and then assembled between the spar and top skin. This segmentation eliminates the need for intricate milling of integrated channels, significantly reducing production time and complexity while maintaining structural integrity
Solution Approach 2:
Channel sidewalls serve as intermediary elements that facilitate bleed air distribution without requiring direct integration into the spar or top skin. These intermediary components simplify the manufacturing process by decoupling the channel formation from the primary structural elements
2Manufacturing precision
If intricate milling is used to create channels, then integrated channel structures are achieved, but production costs increase
Solution Approach 1:
The channel system is divided into separate sidewall components that can be manufactured using simpler processes and then assembled. This segmentation reduces manufacturing complexity while achieving the same functional result as integrated milling
Solution Approach 2:
The channel sidewalls are designed as separate, potentially replaceable components that are easier and cheaper to manufacture than integrated channels. This approach prioritizes cost-effective manufacturing over permanent integration
3Productivity
If channel sidewalls are separate elements, then production is simplified and accelerated, but the structural integrity must be maintained
Solution Approach 1:
The separate channel sidewalls are combined with the spar and top skin through assembly, creating an integrated structure that maintains structural integrity. The merging of these components achieves both production simplicity and structural strength
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 solution accelerates the bleed air flow, ensuring it reaches the entire length of the top skin, effectively heating the leading-edge and simplifying the production process while maintaining structural stability and reducing production time and costs.
Implementation Method 1
the plurality of channel sidewalls is non-parallel to each other such that a distance between the plurality of channel sidewalls at the front bay is bigger than a distance between the plurality of channel sidewalls at the aft bay. Due to the different distances between the channel sidewalls and non-parallel channel sidewalls the cross section of the channel reduces from the front bay to the aft bay. A flow of bleed air starting in the front bay will be accelerated when passing the channels in direction of the aft bay.
Implementation Method 2
This allows a high rate production of the vented leading-edge assembly. Furthermore, since milling is avoided, the production of the vented leading-edge is simple and cost-effective.
Implementation Method 3
The aft chamber of the slat may further comprise an air outlet to the outside of the slat to compensate the pressure which is increased by the inflowing bleed air.
Data Source
AI summary
A vented leading-edge assembly is provided, the assembly including: a slat having a bay and a top skin delimiting a portion of the bay; a spar being arranged in the slat, the spar dividing the bay in a front bay and an aft bay; and a plurality of channel sidewalls being arranged between the top skin and the spar, the plurality of channel sidewalls defining a plurality of channels between the front bay and the aft bay, wherein at least a portion of the spar defines lower channel walls for the plurality of channels.