Deformable Surface Drag Control via Traveling Waves
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Solution Overview
Problem
Existing technologies fail to effectively control and manipulate fluid flow around objects to alter drag characteristics, leading to inefficiencies in energy consumption and control, particularly in environments with complex wind conditions and turbulent flows.
Innovation Solution
The implementation of a system with actuators and sensors that dynamically deform surfaces to create traveling surface waves and deformations, allowing for control of fluid flow by altering the surface geometry in multiple directions, thereby influencing drag and turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rigid fixed surface is used, then the structural strength and stability are maintained, but the ability to adapt to varying fluid flow conditions and control drag is lost
Solution Approach 1:
The patent applies the dynamics principle by transforming the static rigid surface into a dynamic deformable surface that can actively change its geometry in response to fluid flow conditions. The surface is equipped with actuators that enable real-time deformation to optimize drag characteristics while maintaining structural integrity through controlled mechanical movement.
Solution Approach 2:
The patent implements parameter changes by modifying the physical state of the surface from rigid to deformable, allowing continuous adjustment of surface geometry parameters such as curvature, wavelength, and amplitude. This enables the surface to adapt to varying flow conditions while maintaining sufficient strength through material selection and structural design.
2Productivity
If the surface is deformed to control fluid flow, then drag reduction and flow control are achieved, but the device complexity increases due to actuators and sensors
Solution Approach 1:
The patent applies universality by designing a multi-functional integrated system where actuators serve both as structural components and flow control devices. The same deformable surface structure that provides aerodynamic optimization also incorporates sensing capabilities, reducing the need for separate dedicated components and thereby lowering overall device complexity.
Solution Approach 2:
The patent implements self-service through feedback control mechanisms where sensors detect flow conditions and automatically trigger actuator responses without external intervention. This self-regulating system optimizes energy efficiency by activating deformations only when and where needed, reducing unnecessary energy consumption while managing complexity through automated control.
3Object-affected harmful factors
If traveling surface waves are generated, then skin friction is reduced and drag is lowered, but the control system complexity and energy consumption increase
Solution Approach 1:
The patent applies periodic action by generating traveling surface waves with specific frequencies and wavelengths that propagate along the deformable surface. These periodic deformations create favorable flow patterns that reduce skin friction and drag, while the periodic nature allows for efficient energy utilization through rhythmic actuator operation rather than continuous deformation.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting wave characteristics such as amplitude, wavelength, frequency, and propagation direction based on flow conditions. This enables optimization of drag reduction efficiency while minimizing energy consumption by adapting wave parameters to match actual operational requirements rather than maintaining fixed high-energy deformations.
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 approach reduces aerodynamic drag, enhances control over fluid flow, and improves energy efficiency by modulating skin friction, allowing for adaptive management of drag forces and flow characteristics.
Implementation Method 1
selectively deforming the first surface with one or more actuators associated with the first surface to produce a surface wave on the first surface
Data Source
AI summary
A system and method is described generally for deforming a surface of a body to alter a fluid flow in order to change the characteristics of the fluid flow about the body.