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RESEARCH PAPERS

Measurements in Two-Dimensional Plumes in Crossflow

[+] Author and Article Information
B. R. Ramaprian

Department of Mechanical and Materials Engineering, Washington State University, Pullman, WA

H. Haniu

Department of Mechanical Engineering, Kitami Institute of Technology, Hakkaido, Japan

J. Fluids Eng 111(2), 130-138 (Jun 01, 1989) (9 pages) doi:10.1115/1.3243613 History: Received June 17, 1987; Online October 26, 2009

Abstract

The mean-flow and turbulent properties of two-dimensional buoyant jets discharged vertically upward into a crossflowing ambient have been measured in a hydraulic flume, using laser velocimetry and microresistance thermometry. The trajectory of the resulting inclined plume is found to be nearly straight, beyond a short distance from the source. The flow is essentially characterized by the presence of buoyancy forces along (s-direction) and perpendicular (n-direction) to the trajectory. While the s-component buoyancy tends to destabilize the flow and hence raise the overall level of turbulence in the flow, the n-component buoyancy tends to augment turbulence on the upper part of the flow and inhibit turbulence on the lower part. The experimental data are used to examine these effects quantitatively.

Copyright © 1989 by ASME
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