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Study of Mixing Characteristics of Rectangular Turbulent Jets

[+] Author Affiliations
Tarek Abdel-Salam, Gerald Micklow

East Carolina University, Greenville, NC

Paper No. FEDSM2008-55155, pp. 361-368; 8 pages
doi:10.1115/FEDSM2008-55155
From:
  • ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
  • Volume 1: Symposia, Parts A and B
  • Jacksonville, Florida, USA, August 10–14, 2008
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4840-1 | eISBN: 0-7918-3832-3
  • Copyright © 2008 by ASME

abstract

This paper reports a numerical study to investigate the effect of various parameters on the mixing characteristics of two-dimensional turbulent co-flowing jets. The paper is a part of an ongoing research to simulate and investigate the mixing and combustion processes of subsonic jets. Results are obtained with a finite volume CFD code. Turbulence is treated with a two equation k-ε model. The effects of nozzle width (H/W), and nozzle exit velocity (U) on the merging and the combined points are also studied. Different initial jet velocities have been examined corresponding to Reynolds number of 2,000 to 35,000 moreover, three values of the nozzle width ratio H/W = 1.5, 2.0, and 2.5 are used. The results provide acceptable agreement in comparison with the experimental results in prior literature. Results show that the initial velocity of the inner jet has a significant effect on the location of the merging and combining points from the jet exit plane. Also, the increase of the initial jet velocity of the outer jets increases the mixing rate of the jets.

Copyright © 2008 by ASME
Topics: Turbulence , Jets

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