Ambient-Responsive Vortex Generator Spring Mechanism
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Solution Overview
Problem
Existing deployable vortex generators for lifting surfaces require wires and actuators, increasing cost and weight, which negates the benefit of retracting during cruise flight to reduce drag.
Innovation Solution
A deployable vortex generator with a vane that moves between deployed and retracted positions in response to changes in ambient conditions, such as free stream velocity, using a torsion or linear spring mechanism to adjust its angle relative to the airflow, minimizing drag during cruise flight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deployable vortex generators are used to improve low speed performance, then flow separation is reduced during takeoff and landing, but wires and actuators add cost and weight
Solution Approach 1:
The vortex generator vane is designed to automatically deploy and retract in response to ambient flow conditions without external control. The spring mechanism provides the deployment force while aerodynamic forces during low-speed flight maintain the deployed position, and cruise conditions cause automatic retraction, eliminating the need for actuators and control systems
Solution Approach 2:
The invention removes the complex actuator and control wire systems from the vortex generator design. By extracting these heavy mechanical components and replacing them with a passive spring-based mechanism that responds automatically to flow conditions, the system achieves weight reduction while maintaining the beneficial low-speed performance enhancement
2Reliability
If vortex generators are deployed during cruise flight to maintain flow attachment, then flow separation is reduced, but aerodynamic drag increases
Solution Approach 1:
The vortex generator vane is designed as a dynamic component that changes its orientation based on flight conditions. During cruise flight, aerodynamic forces cause the vane to align closely with the free stream velocity, minimizing its interference with the flow and reducing drag. During low-speed flight, the spring mechanism maintains deployment to ensure flow attachment
Solution Approach 2:
The system changes the orientation parameter of the vortex generator vane in response to changing ambient flow conditions. The vane transitions from a deployed orientation that generates vortices and maintains flow attachment to a retracted orientation that aligns with the free stream, thereby adapting to different flight regimes and minimizing harmful drag during cruise
3Device complexity
If a spring mechanism is used to enable automatic deployment, then actuators and wires are eliminated, but device complexity increases
Solution Approach 1:
The invention replaces the complex mechanical actuator and wire control system with a simpler spring-based mechanism. The spring provides the necessary deployment force while aerodynamic forces handle the positioning, substituting a heavy, complex mechanical control system with a lightweight, passive elastic element that is easier to manufacture and maintain
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 solution effectively reduces drag and maintains low-speed performance by deploying the vortex generator during takeoff and landing, while retracting it during cruise to minimize aerodynamic resistance, thus improving flight efficiency and reducing operational costs.
Implementation Method 1
using a torsion or linear spring mechanism to adjust its angle relative to the airflow
Implementation Method 2
In the deployed position, the vane acts on the air flow to create vortices
Data Source
AI summary
A deployable vortex generator attached to a lifting surface includes a vane moveable relative to the lifting surface. The vane moves from a deployed position to a retracted position in response to a change in ambient conditions. In the deployed position, the vane acts on the air flow to create vortices. In the retracted position, the vane is closely aligned with the free stream velocity.