Application of laser-based instrumentation for measurement of time-resolved temperature and velocity fields in the thermoacoustic system

Lei Shi, Zhibin Yu, AJ Jaworski

Research output: Contribution to journalArticle

36 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)1688-1701
Number of pages14
JournalInternational Journal of Thermal Sciences
Issue number9
Early online date10 May 2010
Publication statusPublished - Sep 2010
Externally publishedYes


Cite this