Deformable Surface Actuator for Heat Transfer and Drag Control
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Solution Overview
Problem
Current technologies fail to effectively control heat transfer across surfaces in fluid flow environments, leading to inefficient energy management and increased drag, which affects both aerodynamic performance and thermal regulation.
Innovation Solution
A system comprising a deformable surface with actuators and sensors that generate controlled surface deformations, such as traveling waves, to alter the convective heat transfer coefficient by modifying skin friction, thereby optimizing heat transfer and drag characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the surface is kept fixed and smooth, then the drag is reduced, but the heat transfer coefficient decreases leading to inefficient thermal regulation
Solution Approach 1:
The patent applies dynamic surface deformation through actuators that create traveling waves on the surface. This dynamic approach allows the surface to transition between smooth (low drag) and deformed (high heat transfer) states, resolving the contradiction by making both drag and heat transfer characteristics controllable rather than fixed
Solution Approach 2:
The invention changes the surface geometry parameter dynamically through actuator-induced deformations. By modifying the surface shape parameter (creating waves or ripples), the system simultaneously affects both drag and heat transfer coefficients, allowing optimization of energy efficiency while maintaining thermal regulation capability
2Temperature
If actuators are added to deform the surface for heat transfer control, then heat transfer is improved, but device complexity increases
Solution Approach 1:
The patent employs flexible surface structures that can be deformed by integrated actuators. The use of flexible materials and thin-film actuators allows for compact, low-complexity implementation compared to rigid mechanical systems, reducing overall device complexity while achieving heat transfer control
Solution Approach 2:
The actuator system serves multiple functions: it controls surface deformation for heat transfer management, can potentially control drag, and provides active control capability. This multi-functionality reduces the need for separate systems, thereby managing device complexity
3Temperature
If surface deformation is used to control heat transfer, then thermal regulation is improved, but drag increases
Solution Approach 1:
The system dynamically adjusts surface deformation in response to thermal demands. When heat transfer is prioritized, deformations are activated; when drag reduction is prioritized, the surface returns to smooth configuration. This temporal separation allows thermal regulation improvement without permanent drag penalty
Solution Approach 2:
The actuators create periodic traveling waves on the surface that enhance heat transfer temporarily. These periodic deformations are controlled in duration and frequency, allowing heat transfer improvement during specific periods while maintaining low drag during other periods, thus resolving the contradiction through time-based separation of functions
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 enables precise control of heat transfer and drag, reducing energy consumption and improving the efficiency of surface interactions with fluids, applicable in various applications including aircraft, vehicles, and cooling systems.
Implementation Method 1
System for changing the convective heat transfer coefficient for a surface
Implementation Method 2
alter the characteristics of the skin friction and thereby the heat transfer across the surface due to skin friction
Data Source
AI summary
A system and method for producing surface deformations on a surface of a body. The system and method relate to changing the convective heat transfer coefficient for a surface. The system includes a first surface being a surface of a body exposed to a fluid flow and at least one actuator affecting deformation of the first surface. The system also includes a control system providing control commands to the at least one actuator, the control commands configured to change deformations on the first surface in order to change the convective heat transfer coefficient of the first surface. Further, the system includes a sensor providing environmental characteristic information to the control system.