Shi, L, Yu, Z and Jaworski, AJ (2010) Application of laser-based instrumentation for measurement of time-resolved temperature and velocity fields in the thermoacoustic system. International Journal of Thermal Sciences, 49 (9). 1688 - 1701. ISSN 1290-0729
Abstract
This work aims to develop reliable laser-based measurement techniques to enable fundamental heat transfer and fluid flow studies in thermoacoustic systems. The challenge is to better understand the modes of energy transfer between the key components, such as stacks (or regenerators) and the hot and cold heat exchangers (located on two sides of the stack/regenerator structure), under the oscillatory flow conditions imposed by the acoustic field. The measurement methodologies adopted in this work include combined two-dimensional temperature and velocity field measurements using Planar Laser-Induced Fluorescence (PLIF) and Particle Image Velocimetry (PIV), respectively. These are investigated around the fins of a pair of mock-up heat exchangers placed side by side in a quarter-wavelength standing-wave acoustic resonator, to mimic the working conditions of a thermoacoustic system. The fins are kept at constant temperatures by means of resistive heating and water cooling, respectively. The velocity and temperature field distributions for 20 phases in the acoustic cycle have been obtained. The impact of the inertial, viscous and thermal effects on the time-dependent local temperature and velocity distributions is discussed. Mutual interaction between both fields is also shown. Future work towards obtaining useful heat transfer correlations in oscillatory conditions is outlined.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2010, Elsevier. NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Thermal Sciences. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Thermal Sciences, 49,9, 2010. http://dx.doi.org/10.1016/j.ijthermalsci.2010.03.015 |
Keywords: | Laser-based instrumentation; PLIF; PIV; oscillatory flow; heat transfer; fluid flow; thermoacoustic devices |
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) > Energy Tech & Innovation Initiative (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 24 Jul 2014 13:10 |
Last Modified: | 16 Jan 2018 23:08 |
Published Version: | http://dx.doi.org/10.1016/j.ijthermalsci.2010.03.0... |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ijthermalsci.2010.03.015 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:79886 |