Upstream Influence of a Porous Screen on the Flow Field of a Free Jet

Neely, A. J. and Young, John (2007). Upstream Influence of a Porous Screen on the Flow Field of a Free Jet. In: Peter Jacobs, Tim McIntyre, Matthew Cleary, David Buttsworth, David Mee, Rose Clements, Richard Morgan and Charles Lemckert, 16th Australasian Fluid Mechanics Conference (AFMC). 16th Australasian Fluid Mechanics Conference (AFMC), Gold Coast, Queensland, Australia, (174-179). 3-7 December, 2007.

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
Neely_afmc_16_07.pdf Conference Paper application/pdf 1.88MB 0

Author Neely, A. J.
Young, John
Title of paper Upstream Influence of a Porous Screen on the Flow Field of a Free Jet
Conference name 16th Australasian Fluid Mechanics Conference (AFMC)
Conference location Gold Coast, Queensland, Australia
Conference dates 3-7 December, 2007
Proceedings title 16th Australasian Fluid Mechanics Conference (AFMC)
Place of Publication Brisbane, Australia
Publisher School of Engineering, The University of Queensland
Publication Year 2007
Year available 2007
Sub-type Fully published paper
ISBN 978-1-864998-94-8
Editor Peter Jacobs
Tim McIntyre
Matthew Cleary
David Buttsworth
David Mee
Rose Clements
Richard Morgan
Charles Lemckert
Start page 174
End page 179
Total pages 6
Collection year 2007
Language eng
Abstract/Summary This paper investigates the upstream influence of a range of transverse porous screen geometries on the flow fields of free jets. Infrared thermography was used to map the vertical distribution of temperature in a horizontal heated jet and measure the upstream influence of the screen. Two-dimensional CFD simulations of the flow fields of jets passing through a transverse porous screen, modelled as an array of cylindrical filaments, were also performed for a range of flow speeds (ReD = 6847 to 54779) and screen porosities (! = 0.5 to 1). Reasonable agreement in flow behaviour was obtained using the two methodologies, both of which identified a spreading of the jet flow at the plane of the screen which was primarily dependent on the screen porosity and to a lesser degree the flow Reynolds number. The numerical simulations for these flow conditions predicted that, for a screen placed at x/D = 2, the increase in the full-width half-maximum of the jet velocity profile in the plane of the screen was less than 5% for porosities above 0.85 but increased an order of magnitude when the screen porosity was reduced to 0.5.
Subjects 290500 Mechanical and Industrial Engineering
290200 Aerospace Engineering
290800 Civil Engineering
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Collection: 16th Australasian Fluid Mechanics Conference
 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Created: Wed, 19 Dec 2007, 01:00:48 EST by Laura McTaggart on behalf of School of Engineering