Thrust Reverser Door Deployment Sequence for Backpressure Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current thrust reverser designs for gas turbine engines face challenges in efficiently redirecting thrust during landing, particularly in minimizing backpressure and optimizing airflow redirection, which can impact engine performance and noise levels.
Innovation Solution
The design incorporates a thrust reverser system with a cascade of airfoils and contoured doors that move in an 'umbrella-like' configuration, driven by a threaded actuator system, allowing the outer door to lead the inner door in deployment, minimizing backpressure and optimizing airflow redirection through a combination of ribs and airfoils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional thrust reverser designs are used, then thrust redirection is achieved, but backpressure increases and noise levels rise
Solution Approach 1:
The thrust reverser system is divided into multiple segments including inner doors, outer doors, and cascade elements that can move independently. This segmentation allows each component to be optimized for its specific function while working together to redirect thrust efficiently with minimized backpressure
Solution Approach 2:
The thrust reverser employs dynamic movement of doors and cascade elements during deployment. The inner and outer doors move in a coordinated sequence, and the cascade elements translate and rotate to achieve optimal airflow redirection, reducing both backpressure and noise while maintaining thrust reversal effectiveness
2Object-affected harmful factors
If traditional thrust reverser designs are used, then thrust redirection is achieved, but noise levels increase
Solution Approach 1:
The coordinated dynamic movement of inner and outer doors, combined with cascade element translation and rotation, creates a controlled deployment sequence that reduces turbulence and noise while maintaining effective thrust redirection
Solution Approach 2:
The system changes geometric parameters during deployment including door angles, cascade element positions, and relative movements between components. These parameter changes optimize the airflow path to reduce noise generation while preserving thrust reversal efficiency
3Reliability
If cascade elements translate rearward upon deployment, then bypass duct blocking is achieved, but device complexity increases
Solution Approach 1:
The cascade elements are nested within the bypass duct structure, allowing them to translate rearward and block the duct while maintaining a compact stowed configuration. This nesting approach achieves effective blocking without proportionally increasing overall device complexity
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
This configuration effectively reduces landing distance by efficiently redirecting thrust while minimizing backpressure and noise, ensuring optimal engine performance across various flight conditions.
Implementation Method 1
a threaded actuator system, allowing the outer door to lead the inner door in deployment
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A thrust reverser (80) includes a slider (92) movable along an actuator shaft (90). An inner linkage (94) is mounted to the slider (92) and the inner thrust reverser door (84) and an outer linkage (96) is mounted to the slider (92) and an outer thrust reverser door (86).