Journal article

A Numerical Study of the Effects of the Velocity Ratio on Coflow Jet Characteristics

Xinchen Zhang, Rey C Chin

Journal of Fluids Engineering | American Society of Mechanical Engineers | Published : 2020

Abstract

In this study, large eddy simulations (LES) of turbulent coflow jets are performed and designed to investigate the effects of the jet-to-coflow velocity ratio, Vr, on jet characteristics. A fully developed turbulent pipe flow at Re=10,000⁠, based on the bulk velocity and pipe diameter, is employed as the jet outlet in this work. A comparison between laminar and turbulent jets is performed against the experimental results of a jet produced by a fully developed turbulent pipe flow. For the coflow jet, simulations with different jet-to-coflow velocity ratios (Vr = 3, 6, 12, and ∞⁠) are performed to investigate the turbulence intensities and the decay of the centerline velocity of the jet. The r..

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University of Melbourne Researchers

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Funding Acknowledgements

This work was supported with supercomputing resources provided by the Phoenix HPC service at the University of Adelaide. The authors would like to thank Professor Nathan and Dr. Lau for the useful discussion on particle-laden jets. The authors acknowledge the financial support of the Australian Research Council.