Aircraft Decompression Panel Assembly With Folding Segments
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Solution Overview
Problem
Conventional decompression panels in aircraft sidewalls face challenges during decompression events, such as insufficient space to swing open and noise propagation due to louvers, which hinder effective airflow and increase cabin noise.
Innovation Solution
A decompression panel assembly featuring a frame with a grille opening and flow path, a pivotally coupled face panel, and a retention mechanism that moves from a closed to an open position during decompression events, allowing airflow while maintaining noise attenuation through a solid face panel and tortuous flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If decompression panels are positioned closer to the fuselage skin to gain cabin volume, then cabin volume is increased, but the panels do not have enough space to swing open during decompression events
Solution Approach 1:
The decompression panel is divided into multiple segments (first panel and second panel) that can move independently relative to each other. This segmentation allows the panel to collapse or fold into a compact configuration that fits within the limited space between the sidewall and fuselage skin while still providing adequate decompression opening area when needed.
Solution Approach 2:
The panel transitions from a two-dimensional flat structure to a three-dimensional collapsed configuration during decompression. By utilizing the depth dimension and folding the panel segments, the design achieves both compact storage space and adequate opening area without requiring additional lateral space.
2Productivity
If louvers or openings are included in the grille to allow air flow during decompression, then air flow is enabled, but sound waves propagate through the grille and noise increases
Solution Approach 1:
Different portions of the panel assembly have different functions: the grille portion provides acoustic attenuation to reduce noise, while the collapsible panel segments provide the decompression opening functionality. This local differentiation allows each component to optimize its specific function without compromising the other.
Solution Approach 2:
The solid panel segments act as an intermediary between the grille (noise attenuation component) and the decompression opening requirement. When collapsed, they provide the opening while the grille remains in place to attenuate noise from the surrounding structure.
Data Source
AI summary
A decompression panel assembly for use in an aircraft includes a frame including a first surface and an opposing second surface, wherein the frame defines a grille opening and at least partially defines a flow path opening that are each defined between the first and second surfaces. The decompression panel assembly also includes a first panel and a second panel pivotally coupled together at a central hinge. A retention plate is releasably coupled to the first and second panels and is configured to move between a closed position and an open position. The first and second panels at least partially cover the grille opening in a planar position when the retention plate is in the closed position, and the first and second panels move away from the grille opening to a folded position when the retention plate is in the open position.