Interleaved Fluid Exchange Apparatus for Turbomachine Bypass Ducts
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Solution Overview
Problem
Existing heat management systems for turbomachines that utilize existing fluid streams for cooling or heating often detract from the primary system's performance, such as reducing thrust in turbomachines, due to the reliance on input and output streams for temperature management.
Innovation Solution
A fluid exchange apparatus with interleaved pathways that allows for the exchange of fluids between streams, enabling efficient heat management by decoupling the thermal performance of heat exchangers and optimizing fluid flow between annular inner and outer bypass ducts, thereby improving the allocation of heat energy and fluid flow within the turbomachine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If existing fluid streams (input/output streams) are utilized for heat management, then energy efficiency is improved, but the output or performance of the primary system deteriorates
Solution Approach 1:
The fluid stream is segmented into multiple separate pathways (first pathway and second pathway) that are interleaved with each other. This allows independent control and optimization of each pathway, enabling the system to maintain primary system performance while achieving heat management objectives through selective fluid exchange between pathways.
Solution Approach 2:
A fluid exchange apparatus acts as an intermediary mechanism between the first and second pathways. This apparatus facilitates controlled fluid exchange between the pathways without directly impacting the primary system's main fluid streams, thereby resolving the contradiction between energy efficiency and primary system performance.
2Temperature
If pressurized fan air from bypass duct is used for cooling, then thermal management is improved, but thrust generation deteriorates
Solution Approach 1:
The bypass duct flow is segmented into multiple interleaved pathways with separate fluid exchange apparatuses. This segmentation allows selective cooling of specific fluid streams while maintaining the overall thrust-generating capability of the pressurized fan air by preventing excessive extraction of cooling air from the bypass duct.
Solution Approach 2:
Different portions of the fluid stream are treated differently through localized cooling. The interleaved pathways allow specific regions of the fluid flow to receive cooling while other regions maintain their original thermal state, thereby achieving thermal management without compromising the overall thrust performance.
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 enhances the thermal management of turbomachines by optimizing fluid flow and heat energy allocation between bypass ducts, improving the turbomachine's performance and efficiency while minimizing the impact on primary system operations.
Implementation Method 1
optimizing fluid flow and heat energy allocation between bypass ducts
Data Source
AI summary
Provided are fluid exchange apparatuses and methods of exchanging fluids between streams. Exemplary fluid exchange apparatus includes a first interleaved pathway with a plurality of first passages, and a second interleaved pathway with a plurality of second passages, in which the plurality of first passages and the plurality of second passages interleave with one another. Exemplary methods include directing a first fluid through a first interleaved pathway of a fluid exchange apparatus and directing a second fluid through a second interleaved pathway of a fluid exchange apparatus. The first fluid may flow from an upstream portion of a first duct into the first interleaved pathway and may discharge into a downstream portion of the second duct. The second fluid may flow from an upstream portion of the second duct into the second interleaved pathway and may discharge into a downstream portion of the first duct.