Stator Vane Heat Dissipation via Integrated Fluid Channels
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Solution Overview
Problem
Existing heat exchangers in turbojet engines with speed reduction gears face limitations in heat dissipation capacity, leading to increased aerodynamic drag and acoustic emissions, and require additional cooling systems that compromise performance.
Innovation Solution
The integration of a stator vane system with air flow stream paths and fluid circulation channels within the turbine machine's existing surfaces, particularly at the outlet guide vane, to enhance heat dissipation without adding external coolers, reducing aerodynamic drag, and maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If surface coolers with fins are used to increase heat dissipation capacity, then oil cooling efficiency is improved, but aerodynamic drag is strongly increased
Solution Approach 1:
The patent merges the heat exchanger function with the outlet guide vane structure by integrating fluid circulation channels directly into the vane. This combines two previously separate components (heat exchanger and guide vane) into a single integrated structure, allowing heat dissipation without adding external fins or coolers that would increase aerodynamic drag.
Solution Approach 2:
The outlet guide vane is given multiple functions: it maintains its aerodynamic role in guiding exhaust flow while simultaneously serving as a heat exchanger for cooling lubrication oil. The integrated structure performs both functions without requiring separate dedicated cooling components.
2Temperature
If brick coolers with metal plates and distribution pipes are installed to achieve large heat dissipation capacity, then oil cooling efficiency is improved, but aerodynamic drag is strongly increased
Solution Approach 1:
The patent eliminates the need for separate metal plates and distribution pipes by integrating fluid circulation channels directly into the outlet guide vane structure. The channels are formed as part of the vane itself, removing the need for additional discrete cooling components that would create aerodynamic interference.
3Temperature
If additional heat exchangers are installed to increase heat dissipation capacity, then oil cooling efficiency is improved, but device complexity and aerodynamic drag are increased
Solution Approach 1:
The patent integrates the heat exchanger function into the existing outlet guide vane structure, eliminating the need for separate additional heat exchanger components. The fluid circulation channels are formed directly within the vane, reducing device complexity while maintaining heat dissipation capacity.
Solution Approach 2:
The outlet guide vane serves dual purposes: maintaining aerodynamic flow guidance and providing heat exchange functionality through integrated fluid circulation channels, eliminating the need for separate dedicated cooling systems.
4Temperature
If space is freed in the flow stream to accommodate heat exchangers, then heat dissipation capacity is improved, but acoustic treatment surfaces are eliminated and acoustic emissions increase
Solution Approach 1:
The patent combines heat exchanger functionality with the outlet guide vane structure, eliminating the need to remove acoustic treatment surfaces from the flow stream. The integrated design provides sufficient heat dissipation capacity within the existing vane structure without requiring additional space that would necessitate acoustic treatment removal.
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 solution increases heat dissipation capacity while minimizing aerodynamic and acoustic impacts, allowing for more efficient cooling without the need for additional heat exchangers, thus improving overall turbine machine performance.
Implementation Method 1
Heat can thus be transferred from hot oil to the metal strips by heat conduction and these strips are cooled in contact with air
Implementation Method 2
Heat can thus be transferred from hot oil to the metal strips by heat conduction
Data Source
AI summary
A stator vane for a turbine machine includes a set of vane parts arranged relative to each other to define air flow stream paths between vane parts, and a mechanism circulating a fluid to be cooled by the air flow.