Fuselage Venting Structure for Hydrogen Leak and Overpressure Control

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Solution Overview

Problem

Existing hydrogen storage systems in aircraft face challenges with cryogenic liquids and gases, as they require inert gas to prevent explosive mixtures, which adds weight and volume, and there is no effective venting mechanism to manage leaks or fires.

Innovation Solution

A fuselage design with a non-load bearing outer skin and a space frame structure that includes openable skin areas to vent compartments, allowing controlled release of fluids, maintaining structural integrity and maneuverability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If inert gas is stored in high amounts to prevent explosive gas mixtures, then safety is improved, but weight and package of the aircraft worsen

Engineering Contradiction:

ImprovesafetyVSAvoidweight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent extracts the harmful cryogenic liquid and gas from the aircraft fuselage through venting mechanisms. The openable skin areas allow the harmful substances to be removed from the system, eliminating the need to store large amounts of inert gas for safety, thus resolving the contradiction between safety and weight.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If the non-load bearing outer skin is made openable for venting, then safety against fluid accumulation is improved, but structural integrity worsens

Engineering Contradiction:

ImprovesafetyVSAvoidstructural integrity

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The outer skin is segmented into load-bearing and non-load-bearing areas. The load-bearing outer skin maintains structural integrity, while the non-load-bearing outer skin contains openable skin areas that can be opened for venting without compromising the overall structural strength of the fuselage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different parts of the outer skin have different properties: the load-bearing outer skin provides structural strength, while specific local areas (openable skin areas) are designed to be non-load-bearing and openable for venting purposes, allowing localized functionality without affecting global structural integrity.

Inventive Principle:

Principle #3Local quality

3Object-affected harmful factors

If cryogenic liquid and gas are vented from the fuselage, then fluid accumulation is prevented, but loss of substance increases

Engineering Contradiction:

Improvefluid accumulationVSAvoidloss of hydrogen

Core Design Contradiction:

Object-affected harmful factorsVSLoss of substance

Solution Approach 1:

The venting mechanism converts the harmful effect of fluid accumulation into a controlled release process. By providing designated openable skin areas for venting, the system safely directs the release of cryogenic substances, preventing uncontrolled accumulation while minimizing loss through controlled operation only when necessary for safety.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS12576984B2Fuselage for an aircraft or spacecraft, and aircraft or spacecraft

Publication Date: 2026.03.17 AIRBUS OPERATIONS GMBH

AI summary

A fuselage for an aircraft or spacecraft includes a first fuselage section having a support structure with a load bearing outer skin, and a second fuselage section having a non-load bearing outer skin and a space frame structure for supporting the non-load bearing outer skin, wherein the non-load bearing outer skin includes at least one skin area, which is configured to be openable for venting a compartment, which is at least sectionwise enclosed by the at least one skin area. An aircraft or spacecraft is disclosed including the a fuselage.