Three-Gate Thrust Reverser Installation Under Vertical Tail
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Solution Overview
Problem
Conventional gate thrust reversers have limited installation possibilities due to space constraints, particularly when a mast or vertical tail is present, which can hinder gate deployment or prevent the reverser from being mounted on the aircraft.
Innovation Solution
A thrust reverser with three movable gates that can extend axially downstream of the outlet section, allowing for improved circumferential distribution of deflection surfaces and increased installation possibilities, including under a vertical tail or mast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional two-gate reversers are used, then the structure is simpler, but the installation possibilities are limited and thrust reversal performance is reduced
Solution Approach 1:
The reverser is divided into three separate gates instead of two, with each gate independently controllable. This segmentation allows the gates to be distributed circumferentially around the outlet section, providing better adaptability to different installation configurations including areas with masts or vertical tails, while maintaining manageable structural complexity through modular design
2Ease of operation
If gates are deployed in conventional positions, then the reverser structure is compact, but the presence of mast or vertical tail hinders gate deployment
Solution Approach 1:
The three gates are arranged circumferentially around the outlet section in a three-dimensional configuration, allowing them to deploy in different spatial zones. This dimensional arrangement enables gates to operate around and alongside masts or vertical tails rather than being blocked by them, improving ease of operation in constrained geometries
3Reliability
If three gates are used instead of two, then the circumferential distribution of deflection surfaces is improved, but the control mechanism becomes more complex
Solution Approach 1:
The control system is segmented into individual control mechanisms for each gate, allowing independent operation and simplifying the overall control architecture. Each gate can be controlled separately, which improves thrust reversal performance by enabling precise flow redirection while keeping the control device complexity manageable through modular independence
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 three-gate design enhances installation flexibility and improves thrust reversal performance by allowing for more effective redirection of the fluid flow without interference from central cylinders.
Implementation Method 1
three gates movable between a direct thrust position, wherein the gates are retracted radially outwards from the rear fixed structure, and a reverse thrust position wherein they are configured to extend axially downstream of an outlet section of the propulsion unit so as to redirect said flow of fluid leaving the propulsion unit via this outlet section upstream of the propulsion unit
Data Source
AI summary
A thrust reverser for an aircraft propulsion unit. The thrust reverser includes three gates that can be deployed downstream of an outlet section of the propulsion unit. The device increases the possibilities for installation of the reverser, in particular when a tail assembly extends in line with the propulsion unit.