Distributed Actuator Units for Aerodynamic Flow Control
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Solution Overview
Problem
Active flow control systems for aerodynamic surfaces require a massive compressed air source unit and extensive plumbing, leading to increased weight, pressure drop, and geometric constraints, which counteract the benefits of reduced drag and increased lift.
Innovation Solution
Aerodynamic flow control system with integrated actuator units featuring electrically powered compressors, transitional components, and feedback-free fluidic oscillators that produce oscillating air flows, eliminating the need for a centralized air source and extensive plumbing, and allowing for flexible orientation and programmable control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centralized compressed air source unit is used, then aerodynamic flow control can be achieved, but system weight increases due to extensive plumbing
Solution Approach 1:
The patent divides the centralized air source system into multiple distributed actuator units, each with its own miniaturized air source. This segmentation eliminates the need for extensive plumbing connecting a central source to multiple actuators, thereby reducing system weight while maintaining flow control functionality across the aerodynamic surface.
Solution Approach 2:
Each actuator unit incorporates a local miniaturized air source positioned directly at the actuation location on the aerodynamic surface. This local quality approach eliminates long fluidic conduits and reduces weight by placing the air source where it is needed, rather than transporting compressed air from a remote centralized source.
2Quantity of substance
If extensive fluidic plumbing is used to distribute air, then compressed air can reach actuators, but pressure drop increases along the plumbing lines
Solution Approach 1:
The system segments the air distribution network into independent actuator units, each with its own miniaturized air source. This eliminates long plumbing lines that cause pressure drops, as each unit generates and uses compressed air locally without requiring pressure maintenance over long fluidic conduits.
Solution Approach 2:
The patent extracts the air source function from a centralized location and embeds it within each actuator unit. This removes the need for extensive plumbing infrastructure that would otherwise be required to deliver compressed air from a central source to multiple distributed actuators, thereby eliminating pressure drop issues.
3Quantity of substance
If larger diameter pipes are used to compensate for pressure drop, then air delivery improves, but system weight and complexity increase
Solution Approach 1:
The patent segments the air delivery system into distributed actuator units with miniaturized air sources, eliminating the need for a complex network of large-diameter pipes. Each unit handles its own air delivery independently, simplifying the overall system architecture while maintaining adequate air supply to each actuator.
Solution Approach 2:
The complex plumbing infrastructure is extracted and replaced by integrating miniaturized air sources directly into each actuator unit. This eliminates the need for large-diameter pipes and complex fluidic distribution networks, reducing both weight and system complexity.
4Reliability
If a centralized air source system is implemented, then flow control is achieved, but geometric constraints prevent arbitrary system configuration
Solution Approach 1:
The patent segments the flow control system into independent actuator units that can be distributed across the aerodynamic surface. Each unit is self-contained with its own miniaturized air source, allowing flexible configuration and placement according to geometric constraints without requiring connection to a centralized air source through extensive plumbing.
Solution Approach 2:
Each actuator unit is designed as a self-contained local system with integrated miniaturized air source, enabling adaptation to various geometric configurations. This local quality approach allows the system to be tailored to specific geometric constraints while maintaining flow control functionality.
5Productivity
If matching compressor capability to actuator requirements is required, then system performance is optimized, but system design becomes more difficult
Solution Approach 1:
The patent segments the system into standardized actuator units with integrated miniaturized air sources. Each unit is designed as a self-contained module with matched compressor and actuator components, simplifying the design process while optimizing performance. The modular approach allows easy scaling and configuration without complex system-level matching calculations.
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 reduces weight and complexity while maintaining aerodynamic performance by providing efficient, flexible, and redundant active flow control, enabling reduced drag and increased lift without the penalties of traditional systems.
Implementation Method 1
an electrically powered compressor to compress air
Implementation Method 2
a feedback-free fluidic oscillator... that produces oscillating air flows
Data Source
AI summary
An aerodynamic flow control system includes a plurality of actuator units integrated at predetermined locations along a span of an aerodynamic surface of a vehicle to provide aerodynamic active air flow control, wherein each of the plurality of actuator units includes an electrically powered compressor to compress air; a transitional component to receive the compressed air from the compressor and provide two streams of the compressed air; and a fluidic oscillator having two inlet ports that receive the two streams of the compressed air, and an exit port that discharges a single oscillating flow of air at a predetermined velocity.