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Annular impinging jet with recirculation zone expanded by acoustic excitation

Trávnícek, Z. and Tesar, V. (2004) Annular impinging jet with recirculation zone expanded by acoustic excitation. International Journal of Heat and Mass Transfer, 47 (10-11). 2329 -2341. ISSN 0017-9310


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Flow visualization and mass transfer (naphthalene sublimation) experiments were performed on acoustically excited annular air jet with diameter ratio Di/Do=0.95. Two different regimes of the time-mean flow field were found, differing in the size of the central recirculation zone, with either the single stagnation point or the stagnation circle. The switching between the two regimes is accomplished by acoustic excitation, under identical geometry conditions. An effective stabilization of the large recirculation zone, as well as remarkable augmentation of average heat/mass transfer by 23%, have been achieved at the excitation Strouhal number Sh=0.94.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2004 Elsevier Science Ltd. This is an author produced version of an article published in International Journal of Heat and Mass Transfer.
Keywords: jet, impinging jet, annular jet, nozzle, flow control, acoustic excitation, mass transfer, heat transfer, mass transfer analogy, flow visualization, Naphthalene method
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Chemical and Biological Engineering (Sheffield)
Depositing User: Vaclav Tesar
Date Deposited: 06 Jun 2005
Last Modified: 16 Dec 2015 22:19
Published Version: http://www.sciencedirect.com/science/journal/00179...
Status: Published
Refereed: Yes
Identification Number: 10.1016/j.ijheatmasstransfer.2003.10.032
URI: http://eprints.whiterose.ac.uk/id/eprint/508

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