Aircraft Barrier Burst Panels for Precise Decompression Venting
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Solution Overview
Problem
Existing aircraft venting systems for smoke and flame isolation between compartments suffer from low accuracy in activation at specific pressure thresholds, leading to potential malfunctions due to friction variations and material properties, which complicates environmental isolation and decompression events.
Innovation Solution
A lightweight system using flexible textile barriers with 'burst' panels that are calibrated to fail at predetermined pressure differentials, providing precise activation during rapid decompression events and maintaining isolation across varying pressure conditions without fragmenting, thus eliminating the need for additional retention devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a frame or structural member is used to support a barrier between compartments, then the barrier can withstand differential pressure, but the weight and cost of the aircraft increase
Solution Approach 1:
The patent employs a flexible barrier membrane that can deform under pressure rather than requiring a rigid frame structure. The membrane is designed to flex and conform to pressure differentials while maintaining its barrier function, eliminating the need for heavy structural support members and significantly reducing aircraft weight.
Solution Approach 2:
The barrier system is designed to dynamically respond to pressure changes through the inclusion of decompression panels that can open or deform when pressure differentials exceed predetermined thresholds. This dynamic behavior allows the barrier to adapt to varying pressure conditions without requiring oversized structural support, optimizing both strength and weight.
2Reliability
If known venting systems with decompression panels are used, then pressure relief during decompression is provided, but activation accuracy is low due to friction variations
Solution Approach 1:
The patent replaces traditional mechanical decompression panels with a membrane-based system that responds to pressure differentials through elastic deformation and rupture of sealed sections. This substitution eliminates friction-based activation mechanisms and uses material science principles (elasticity, tensile strength) to achieve precise and consistent activation at predetermined pressure thresholds, significantly improving measurement precision and reliability.
3Object-affected harmful factors
If a rigid barrier structure is used for environmental isolation, then smoke and flame isolation is effective, but the system cannot accommodate decompression events
Solution Approach 1:
The barrier system transitions from a static rigid structure to a dynamic membrane system that can adapt its configuration in response to different operational conditions. During normal operation, the membrane maintains tautness for effective smoke and flame isolation. During decompression events, sealed sections of the membrane rupture at predetermined pressure thresholds, allowing the structure to dynamically accommodate pressure changes while maintaining isolation integrity.
Solution Approach 2:
The continuous membrane barrier is segmented into multiple sealed sections or panels, each capable of independent rupture or deformation at predetermined pressure thresholds. This segmentation allows the barrier to progressively accommodate decompression events while maintaining isolation in non-pressurized sections, enhancing both adaptability and safety.
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
The system effectively limits smoke or flame dispersion and maintains environmental isolation during decompression events, ensuring reliable operation and structural integrity while reducing aircraft weight and cost.
Implementation Method 1
the burst panel member comprising a line of weakness provided therein, adapted such that, in use, exposure of the burst panel member to an atmospheric pressure differential between air volumes respectively adjacent the first and second sides exceeding a predetermined value causes the burst panel member to rupture along said line of weakness
Data Source
AI summary
A barrier for providing isolation between two internal volumes within an aircraft, comprises: a wall section adapted for location within an aircraft, the wall section having an aperture formed therein; mounting means located on the wall section proximate the aperture; and a substantially planar burst panel member having first and second opposingly-facing sides, the burst panel member adapted for location within the mounting means and dimensioned so as to overlie the aperture when received by the mounting means; the burst panel member comprising a line of weakness provided therein, adapted such that, in use, exposure of the burst panel member to an atmospheric pressure differential between air volumes respectively adjacent the first and second sides exceeding a predetermined value causes the burst panel member to rupture along said line of weakness.