Ilori, OM, Jaworski, AJ, Mao, X orcid.org/0000-0002-9004-2081 et al. (1 more author) (2021) Effects of Edge Shapes on Thermal-Fluid Processes in Oscillatory Flows. Thermal Science and Engineering Progress, 25. 101004. ISSN 2451-9049
Abstract
Thermoacoustic machines, Stirling engines or coolers, and pulse tube coolers are examples of energy systems that operate based on oscillatory flow principles. This class of technology would achieve an improved efficiency from appropriately designed heat exchangers, stacks, regenerators and thermal buffer tubes. In this paper, heat transfer and oscillatory flow behaviour in three identical parallel-plate heat exchangers, one ‘heat source’ positioned between two ‘heat sinks’, are investigated using numerical method. The effect of different plate edge shapes on heat transfer, flow structures and acoustic pressure drop are examined at a selected drive ratio of 0.3 – 2.0%. Flow parameters show a strong dependency on drive ratio and flow direction, especially at low excitation where gas displacements are below or comparable to the heat exchanger length. Cone edge shape minimises the flow complexity better than other shapes with a negligible effect on the heat transfer. The result of this study will benefit the design and development of compact and high-efficiency heat exchangers for the next generation of oscillatory-flow energy and thermal management systems.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | Drive ratio; Edge-shape; Heat transfer; Oscillatory flows; Thermal potential |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 13 Jan 2023 08:15 |
Last Modified: | 16 Jan 2023 17:06 |
Published Version: | http://dx.doi.org/10.1016/j.tsep.2021.101004 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.tsep.2021.101004 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:195083 |