Temperature-Responsive Flow Aperture for Jet Engine Thermal Control
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Solution Overview
Problem
Conventional thermal control methods in jet engines are often heavy, space-consuming, and require significant maintenance, posing challenges in aviation applications.
Innovation Solution
The implementation of a flow aperture system using a temperature-responsive material, such as high-temperature alloys or bimetallic components, that deflects to modulate fluid flow through a passageway, eliminating the need for mechanical actuators and allowing for thermally controlled flow modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical actuators are used for thermal control, then flow modulation capability is improved, but device weight increases
Solution Approach 1:
The patent replaces mechanical actuators with a thermal field-based flow modulation system. Temperature-responsive materials (such as shape memory alloys or thermally-expanding materials) directly convert thermal energy into mechanical deformation to modulate flow apertures, eliminating the need for separate mechanical actuation systems and thereby reducing device weight.
Solution Approach 2:
The patent changes the control parameter from mechanical actuation to temperature control. By varying the temperature of the temperature-responsive material, the flow aperture area is dynamically modulated. This parameter change enables flow control without mechanical moving parts, reducing overall system weight.
2Ease of operation
If mechanical actuators are used for thermal control, then flow modulation capability is improved, but device complexity increases
Solution Approach 1:
The patent substitutes complex mechanical actuation mechanisms with a simpler thermal-responsive material system. The temperature-responsive material inherently provides the flow modulation function through thermal expansion or phase change, eliminating the need for motors, linkages, and control electronics associated with mechanical actuators.
Solution Approach 2:
The temperature-responsive material performs the flow modulation function autonomously in response to temperature changes, without requiring external mechanical actuation. The material self-regulates the flow aperture based on thermal input, simplifying the overall system architecture and reducing device complexity.
3Ease of operation
If mechanical actuators are used for thermal control, then flow modulation capability is improved, but maintenance requirements increase
Solution Approach 1:
The patent replaces mechanical actuators prone to wear and failure with solid-state temperature-responsive materials that have no moving parts. This substitution eliminates maintenance issues associated with mechanical wear, lubrication, and actuator failure, significantly reducing maintenance requirements.
Solution Approach 2:
The temperature-responsive material can be designed as a simple, replaceable component with no moving parts. If degradation occurs, the entire material element can be replaced as a single unit without complex disassembly or repair procedures, simplifying maintenance operations.
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 flexible and efficient thermal control, reducing weight, space, and maintenance requirements by modulating fluid flow without mechanical actuators, thereby enhancing thermal management in jet engines.
Implementation Method 1
at least one material that deflects as a function of temperature
Implementation Method 2
high-temperature alloys or bimetallic components
Data Source
AI summary
In a jet engine having a core that sources a first flow of fluid and a component (such as a fan, a pump, and/or a bleed line) that sources a second flow of fluid, and where the first flow of fluid will typically have, at least during ordinary operation, a higher temperature than the second flow of fluid, at least one flow aperture formed by a first passageway to receive at least a portion of the aforementioned second flow of fluid, wherein that first passageway is comprised of at least one material that (by design and intent) deflects as a function of temperature such that a flow of the second flow of fluid through the at least one flow aperture is thereby desirably modulated.