Influence of tilt and surface roughness on the outflow wind field of an impinging jet

Mason, M. S., Wood, G. S., & Fletcher, D. F. (2009) Influence of tilt and surface roughness on the outflow wind field of an impinging jet. Wind and Structures, 12(3), pp. 179-204.

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Abstract

A physical and numerical steady flow impinging jet has been used to simulate the bulk characteristics of a downburst-like wind field. The influence of downdraft tilt and surface roughness on the ensuing wall jet flow has been investigated. It was found that a simulated downdraft impinging the surface at a non-normal angle has the potential for causing larger structural loads than the normal impingement case. It was also found that for the current impinging jet simulations, surface roughness played a minor role in determining the storm maximum wind structure, but this influence increased as the wall jet diverged. However, through comparison with previous research it was found that the influence of surface roughness is Reynolds number dependent and therefore may differ from that reported herein for full-scale downburst cases. Using the current experimental results an empirical model has been developed for laboratory-scale impinging jet velocity structure that includes the influence of both jet tilt and surface roughness.

Impact and interest:

4 citations in Scopus
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2 citations in Web of Science®

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ID Code: 70455
Item Type: Journal Article
Refereed: Yes
Keywords: Downburst, Microburst, Impinging jet, Tilted Jet, Surface roughness, Empirical model
DOI: 10.12989/was.2009.12.3.179
ISSN: 1226-6116
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Computational Fluid Dynamics (091501)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Fluidisation and Fluid Mechanics (091504)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 01 Jul 2014 00:20
Last Modified: 01 Jul 2014 22:52

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