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An Experimental Investigation of a Plane Jet in a Wavy Crossflow

[+] Author Affiliations
A. A. Abdel-Rahman, M. A. Eleshaky

Alexandria University, Alexandria, Egypt

Paper No. FEDSM2003-45704, pp. 781-787; 7 pages
doi:10.1115/FEDSM2003-45704
From:
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 2: Symposia, Parts A, B, and C
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3697-5 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME

abstract

An experimental investigation has been undertaken to study the effect of a wavy crossflow on a plane jet discharged vertically downward in a water channel. Two groups of experiments were performed; one group for a jet discharged into a uniform crossflow, the second group for a jet discharged into a wavy crossflow. Experiments were conducted for four jet-to-crossflow velocity ratios (R = 1, 3, 5, and 7). For each experiment, measurements using LDA system were made at six stations downstream of the exit of the jet nozzle (x = 0.0, 6, 12, 18, 27, and 36 mm). During the course of the experiments, the channel flow velocity was maintained fairly constant at 15 cm/s, and the wave generated in the channel was not very steep. The results revealed that the oscillatory motion associated with the waves has a significant effect on both the mean and turbulent velocity fields. The mean velocity profiles were found to have no maximum values, compared with those of a uniform crossflow. The effect was most pronounced in the zone of flow establishment, where a region of intense fluid mixing arises, resulting in a significant shortening of the zone and a rapid development of the jet flow.

Copyright © 2003 by ASME

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