Multi-Functional Thrust Reverser Structure for Lower Mass and Drag
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Solution Overview
Problem
Movable-cascade thrust reversers in the aeronautics sector have a complex and voluminous architecture due to the lack of a front frame, leading to increased mass and drag, and they do not efficiently integrate functions like cascade guidance and flow deflection.
Innovation Solution
A fixed structure is integrated into the movable-cascade reverser, connecting to the turbine engine casing and incorporating an upper beam and lower beam to support and guide cascades, while also serving as a deflection edge, thereby simplifying the architecture and reducing mass and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If movable-cascade reversers are designed without a front frame, then the architecture becomes simpler and mass is reduced, but the structure becomes voluminous and lacks functional integration
Solution Approach 1:
The patent merges multiple previously separate components (front frame, guide rails, deflection edges, and support structures) into a single integrated fixed structure. This consolidation reduces the number of parts and simplifies the overall architecture while maintaining all necessary functions including cascade guidance, flow deflection, and structural support.
Solution Approach 2:
The fixed structure is designed as a multi-functional component that simultaneously performs structural support, cascade guidance, flow deflection, and connection to the turbine engine casing. This universal design eliminates the need for separate dedicated components for each function, reducing mass and simplifying the architecture.
2Adaptability or versatility
If members are fastened to the turbine engine to perform multiple functions, then functional requirements are met, but the architecture becomes complex and voluminous
Solution Approach 1:
The patent combines multiple functional elements into a single fixed structure that is integrated with the turbine engine casing. This merging approach maintains all required functions (guidance, deflection, support) while significantly reducing the overall volume compared to having separate fastened members for each function.
Solution Approach 2:
The fixed structure serves multiple purposes simultaneously: it provides structural support, guides the cascades, deflects the reversal flow, and connects to the turbine engine. This multi-functional design achieves high adaptability without increasing volume, as all functions are embedded within a single compact structure.
3Weight of stationary object
If a multi-functional fixed structure is integrated, then mass and cost are reduced, but the design complexity increases
Solution Approach 1:
The fixed structure is designed as a universal component that performs multiple functions within a single integrated design. While the initial design phase requires careful planning to incorporate all functions, the manufacturing process is simplified by reducing the number of separate parts, assembly steps, and fastening operations, ultimately lowering production complexity.
Data Source
AI summary
A movable-cascade thrust reverser includes a multi-functional annular fixed structure configured to be rigidly connected to a turbine engine fan casing or to an intermediate casing secured to the fan casing.