An Experimental Study on Turbulent Circular Wall Jets
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Volume 128, Issue 2
Abstract
The results of a laboratory investigation on the characteristics of a circular three-dimensional turbulent wall jet are presented. Measurements were performed up to 50 nozzle diameters using a combined Particle Image Velocimetry and Planar Laser Induced Fluorescence approach that captured simultaneously the planar velocity and concentration fields. Both the velocity and concentration profiles exhibited similarity in the streamwise and spanwise directions after sufficient distance from the nozzle. The existence of a secondary mean motion is shown to be responsible for the far greater lateral spread compared to the normal spread for both the momentum and scalar mixing. Using curve fitting, the mean properties of the three-dimensional wall jet are approximated. The consistency of the relationships is further examined based on mass conservation and momentum balance.
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References
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Published In
Journal of Hydraulic Engineering
Volume 128 • Issue 2 • February 2002
Pages: 161 - 174
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Mar 31, 2000
Accepted: May 10, 2001
Published online: Feb 1, 2002
Published in print: Feb 2002
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