Integrated Slat Chine Vortex Lift Enhancement
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Solution Overview
Problem
Conventional solutions for optimizing the aerodynamic performance of aircraft wings, particularly in tuning the inboard and outboard portions, result in sub-optimal performance due to aerodynamic penalties and the need for complex actuation systems, as nacelle chines fail to adequately address the outboard portion and require detuning the inner wing.
Innovation Solution
The integrated slat chine apparatus couples a slat with a chine on the airfoil, where the slat moves relative to the airfoil between stowed and deployed positions, exposing or covering the chine's surface to generate a vortex and enhance lift without relying on auto-slat or auto-gap functions, thus optimizing aerodynamic performance without adverse effects during cruise operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional nacelle chines are used to optimize inboard wing performance, then inboard aerodynamic performance is improved, but outboard wing performance deteriorates due to aerodynamic penalties and requires detuning
Solution Approach 1:
The invention divides the wing into inboard and outboard portions with separate control mechanisms. The inboard slat is controlled independently from the outboard slat, allowing each section to be optimized for its specific aerodynamic requirements without compromising the other portion of the wing
Solution Approach 2:
The invention implements dynamic control of slat deployment where the inboard and outboard slats can be deployed at different angles and timings. This dynamic adjustment allows the system to adapt to varying flight conditions and optimize performance across different portions of the wing simultaneously
2Reliability
If complex actuation systems are used to achieve optimal aerodynamic performance, then aerodynamic efficiency is improved, but device complexity increases
Solution Approach 1:
The invention combines the slat and chine into an integrated apparatus where the slat itself serves as the aerodynamic control surface. This merging eliminates the need for separate complex actuation systems by using the slat's movement to directly control the aerodynamic characteristics, simplifying the overall system while maintaining efficiency
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 increases the maximum lift coefficient and lift-to-drag ratio during takeoff and landing while maintaining aerodynamic efficiency during cruise, reducing the need for complex actuation systems and enhancing overall wing performance.
Implementation Method 1
the slat is to expose the lateral surface of the chine when the slat is in the deployed position and to cover the lateral surface of the chine when the slat is in the stowed position
Data Source
AI summary
Integrated slat chine apparatus and methods are described. An example method comprises moving a slat relative to an airfoil between a stowed position and a deployed position. The slat is coupled to the airfoil. The slat is located adjacent a lateral surface of a chine. The chine is coupled to the airfoil. The slat is to expose the lateral surface of the chine when the slat is in the deployed position and to cover the lateral surface of the chine when the slat is in the stowed position.