Angled Pivot Axes Thrust Reverser Doors
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Solution Overview
Problem
Existing pivoting door thrust reverser systems for aircraft propulsion systems lack improved performance and tailorable efflux capabilities.
Innovation Solution
The proposed apparatus includes a pivoting door thrust reverser system with a plurality of thrust reverser doors, where each door pivots about a respective axis between stowed and deployed positions. The pivot axes of the doors are angularly offset and non-parallel to each other, allowing for enhanced redirection of gas streams and improved blocking of access to the exhaust nozzle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional parallel pivot axes are used for thrust reverser doors, then the structure is simple and easy to manufacture, but the gas redirection capability and thrust reversal performance are limited
Solution Approach 1:
The patent applies asymmetry by configuring the pivot axes of opposing thrust reverser doors to be non-parallel and angularly offset from each other. This asymmetric arrangement allows the doors to redirect exhaust gases more effectively across the engine centerline, improving thrust reversal performance while maintaining structural feasibility
2Productivity
If pivot axes are angularly offset to improve gas redirection, then thrust reversal performance is enhanced, but the device complexity increases
Solution Approach 1:
The patent applies local quality by implementing angular offset specifically at the pivot axes of opposing doors, while other components of the thrust reverser system maintain conventional configurations. This localized modification optimizes gas redirection capability without requiring complex changes throughout the entire system
3Reliability
If non-parallel pivot axes are used for opposing doors, then blocking capability to exhaust nozzle access is improved, but manufacturing and assembly difficulty increases
Solution Approach 1:
The patent applies dimensionality change by introducing angular offset in the rotational plane of the pivot axes. This adds a dimensional parameter to the door configuration that improves blocking capability by better covering the exhaust nozzle exit area, while the offset angles are designed to remain within manufacturable ranges
Data Source
AI summary
An apparatus is provided for an aircraft propulsion system. This apparatus includes a pivoting door thrust reverser system, and the pivoting door thrust reverser system includes a plurality of thrust reverser doors. Each of the thrust reverser doors is configured to pivot about a respective pivot axis between a stowed position and a deployed position. The thrust reverser doors include a first thrust reverser door and a second thrust reverser door. The second thrust reverser door is arranged to an opposing side of the pivoting door thrust reverser system from the first thrust reverser door. The pivot axis of the first thrust reverser door is angularly offset from a reference line by an acute angle. The reference line is coincident with and perpendicular to a centerline of the pivoting door thrust reverser system.