Retractable Vortex Generators for Aircraft Flow Control
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Solution Overview
Problem
Existing fixed-wing aircraft technologies face challenges in effectively delaying local flow separation and aerodynamic stalling over the outer surfaces, while maintaining smooth airflow during non-issue flight modes, which increases energy consumption.
Innovation Solution
The implementation of movable vortex generators through the aircraft's outer surface, actuated by electric motors and controlled by an electronic control unit, allowing for flexible deployment between retracted and fully extended states, and potentially intermediate positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vortex generators are extended to delay flow separation and stalling, then aerodynamic performance is improved, but energy consumption increases due to disrupted smooth airflow
Solution Approach 1:
The vortex generators are made movable between extended and retracted positions through electric motor actuation. The system dynamically adjusts the vortex generator position based on flight conditions - extended when flow separation risk is detected, retracted when smooth airflow is prioritized - thereby resolving the contradiction between aerodynamic performance and energy consumption
Solution Approach 2:
The system changes the physical state parameter of the vortex generators from fixed to variable position. By controlling the extension position continuously or in discrete steps, the system optimizes the balance between flow separation delay and energy consumption based on real-time aerodynamic conditions
2Stability of the object's composition
If vortex generators are fixed in extended position to prevent flow separation, then aerodynamic stability is improved, but flexibility in adapting to different flight modes is reduced
Solution Approach 1:
The vortex generators transition from a fixed configuration to a dynamic, adjustable system. The electronic control unit coordinates multiple electric motors to position vortex generators according to different flight modes, providing both aerodynamic stability when needed and adaptability to varying flight conditions
3Reliability
If multiple vortex generators are deployed across the aircraft surface, then flow separation control is improved, but device complexity increases
Solution Approach 1:
The aircraft surface is divided into multiple zones with individually controllable vortex generators. Each vortex generator or group can be independently actuated by electric motors based on local flow conditions, providing precise flow separation control while managing system complexity through modular segmentation
Solution Approach 2:
The system uses variable positioning of multiple vortex generators rather than a single fixed complex mechanism. By controlling the position parameter of each vortex generator independently, the system achieves comprehensive flow separation control with manageable complexity through electronic coordination
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 solution enables precise control of airflow, effectively delaying flow separation and stalling at positions with extended vortex generators, while allowing smooth airflow at partially or fully retracted positions, thereby reducing energy consumption.
Implementation Method 1
actuated by electric motors
Implementation Method 2
vortex generators function to create a swirling fluid flow
Data Source
AI summary
A fixed-wing aircraft at least includes at least one vortex generator movable through an outer surface of the aircraft between a retracted state and a fully extended state by at least one electric motor, the at least one electric motor being exclusively adapted to actuate this at least one vortex generator, and including an electronic control unit adapted to control operation of the at least one electric motor for actuation of the at least one vortex generator.