Nested Variable-Volume Aircraft Fuel Storage Structure
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Solution Overview
Problem
Aircrafts face challenges in efficiently storing and utilizing multiple types of fuel due to the negative impact of external fuel tanks on aerodynamic performance and the cost and space constraints of internal tanks, particularly when different fuels are needed at various stages of flight.
Innovation Solution
A fuel storage structure comprising a first container for a primary fuel type and a second, variable-volume container within it, along with a fuel release apparatus that allows selective use of either fuel type, enabling flexible fuel storage and use without compromising aerodynamic performance or cargo volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If external fuel tanks are used to store multiple types of fuel, then fuel storage capacity is improved, but aerodynamic performance deteriorates
Solution Approach 1:
The patent implements a nested container configuration where a second container storing a second type of fuel is positioned inside a first container storing a first type of fuel. This nested arrangement allows multiple fuel types to be stored within the existing fuel tank volume without adding external tanks, thereby maintaining aerodynamic performance while increasing fuel storage capacity for multiple fuel types.
Solution Approach 2:
The patent utilizes the vertical dimension by positioning the second container at the bottom of the first container. This dimensional arrangement allows efficient use of the existing fuel tank volume to store multiple fuel types without increasing the external footprint or compromising aerodynamic characteristics.
2Quantity of substance
If additional internal tanks are added to the fuselage, then fuel storage capacity is improved, but cargo volume deteriorates
Solution Approach 1:
The nested container configuration allows the second container to be positioned within the existing first container volume. This approach increases fuel storage capacity for multiple fuel types without requiring additional fuselage space, thereby preserving cargo volume while achieving the goal of storing multiple fuel types.
3Adaptability or versatility
If permanent storage is provided for expensive fuel types, then fuel availability is improved, but cost deteriorates
Solution Approach 1:
The second container is designed with variable volume capability, allowing it to be expanded when the second type of fuel is required and collapsed when not needed. This dynamic configuration enables the system to adapt to different fuel requirements without permanent fixed infrastructure, reducing costs while maintaining fuel availability when needed.
Solution Approach 2:
The volume parameter of the second container can be changed between expanded and collapsed states. When the second type of fuel is required, the container expands to provide storage; when not required, it collapses to minimize space occupation and reduce infrastructure costs, thereby achieving cost-effective fuel availability.
4Device complexity
If a fixed-volume second container is used, then storage structure is simplified, but fuel storage flexibility deteriorates
Solution Approach 1:
The second container incorporates variable volume capability that allows it to expand when storing the second type of fuel and collapse when not in use. This dynamic design provides fuel storage flexibility for different fuel types while maintaining relatively simple structural implementation through the use of collapsible container designs.
Data Source
AI summary
A fuel storage structure for an aircraft. The fuel storage structure comprises a first container configured to store a first type of fuel and a second container arranged within the first container. The second container has a variable volume and is configured to store a second type of fuel. The fuels storage structure comprises a fuel release apparatus operable to provide the first type of fuel and the second type of fuel stored by the first container and the second container, respectively, to an engine of the aircraft.