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Mixing layer oscillations for a submerged horizontal wall-jet

Chua, Lloyd H. and Shuy, E.B. 2006, Mixing layer oscillations for a submerged horizontal wall-jet, Journal of hydraulic research, vol. 44, no. 1, pp. 115-123, doi: 10.1080/00221686.2006.9521666.

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Title Mixing layer oscillations for a submerged horizontal wall-jet
Author(s) Chua, Lloyd H.ORCID iD for Chua, Lloyd H. orcid.org/0000-0003-2523-3735
Shuy, E.B.
Journal name Journal of hydraulic research
Volume number 44
Issue number 1
Start page 115
End page 123
Total pages 9
Publisher Taylor & Francis
Place of publication London, Eng.
Publication date 2006
ISSN 1814-2079
Keyword(s) mixing layer
shear layer
wall-jet
instability
large scale structures
linear stability analysis
Summary Measurements of the horizontal velocity component were made for a horizontal wall-jet emanating from a submerged sluice gate forming one side of a large flow compartment. The existence of large-scale vortex structures was quantified by spectral analysis of the velocity measurements taken at various distances from the floor of the flow compartment, for different measurement stations from the jet exit. Close to the jet exit, the spectra of the velocity measurements within the potential core exhibit multiple peaks. Further downstream, the spectra are more defined and peak at the same frequency, irrespective of whether the measurements were made within the potential core or the mixing layer. The spectral peak corresponds to the passage frequency of large-scale vortex structures. Downstream of the potential core, the peak frequencies of the velocity spectra increase as the measurement location was moved towards the floor of the flow compartment. The increase in peak frequencies is attributed to fluctuations associated with the wall boundary layer. Predictions of the mixing layer instabilities were made using linear stability analysis. The predictions are in good agreement with the observed vortex shedding frequencies in the mixing layer
Language eng
DOI 10.1080/00221686.2006.9521666
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2006, Taylor & Francis
Persistent URL http://hdl.handle.net/10536/DRO/DU:30063762

Document type: Journal Article
Collection: School of Engineering
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