Steerable Nozzle Vortex Generator for Vehicle Aerodynamics
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Solution Overview
Problem
Conventional aerodynamic systems for vehicles fail to effectively reduce turbulence and energy consumption at high speeds, particularly at regions with high angles of air separation, and are aesthetically constraining or difficult to integrate.
Innovation Solution
An aerodynamic system featuring a steerable nozzle capable of generating periodic air jets that can be placed downstream of air separation regions, adjustable to direct vortices towards the shear layer and main return vortex, with electromechanical means for frequency and orientation control, allowing adaptation to vehicle type and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional aerodynamic systems (spoilers, fins, deflectors) are used to reduce turbulence, then energy consumption is reduced, but the vehicle appearance is constrained and integration is difficult
Solution Approach 1:
The nozzle is made movable and adjustable, allowing it to change orientation dynamically. This enables the system to adapt to different flow conditions and vehicle configurations, resolving the contradiction by making the device flexible rather than fixed, thus reducing integration constraints while maintaining energy reduction effectiveness
Solution Approach 2:
The system changes the orientation parameter of the nozzle to optimize vortex generation at different separation angles. By adjusting the nozzle angle, the system maintains effectiveness across various vehicle designs without requiring complex custom integration for each vehicle type
2Loss of energy
If finned vortex generators are used at low separation angles, then turbulence is reduced, but they become ineffective at high separation angles
Solution Approach 1:
The nozzle orientation is made dynamic and adjustable, allowing the system to adapt to different separation angles by changing the jet direction. This resolves the contradiction by enabling the same device to be effective at both low and high separation angles through orientation adjustment
Solution Approach 2:
The system uses a focused jet from a nozzle that can be independently oriented, allowing precise targeting of the separation region regardless of the angle. This segmented, directional approach enables effectiveness across various separation angles unlike fixed fin structures
3Loss of energy
If electromechanical means for periodic air jets are used, then vortex intensity is reduced, but precise positioning is required and adaptability to different vehicles and speeds is difficult
Solution Approach 1:
The nozzle orientation is made adjustable to adapt to different vehicle types and driving speeds. This dynamic positioning capability eliminates the need for very precise fixed positioning, allowing the system to be effective across various vehicle configurations and operating conditions
Solution Approach 2:
The system is designed with an adjustable nozzle that can serve multiple vehicle types and speed conditions with a single configuration. This multi-functionality resolves the contradiction by making the system adaptable rather than requiring vehicle-specific customization
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 system efficiently reduces turbulence and energy consumption by directing air jets to optimize vortex formation and penetration into the shear layer, maintaining effectiveness across varying angles and driving conditions without altering vehicle body shapes.
Implementation Method 1
The vortex generator comprises at least one steerable nozzle capable of generating vortices moving in a defined direction, towards the shear layer and the main return vortex
Implementation Method 2
capable of generating a periodic air jet
Data Source
Figure 1~2
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AI summary
Aerodynamic system (1) for motor vehicle, comprising at least one vortex generator (2) which generates a vortex by creating a periodic air jet (15) able to be positioned downstream of at least one boundary layer separation region (9) of at least one bodywork element (4) of a vehicle, said boundary layer separation region (9) generating a turbulent zone (3) comprising a shear layer (8) and a main returning vortex (5), characterized in that said vortex generator (2) comprises at least one orientable nozzle (6) able to generate vortices (7) moving in a defined direction toward the shear layer (8) and the main returning vortex (5), in a different plane from the shear layer (8).