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Analysis of Turbulent Scales in Variable Density Jets Using Laser Anemometry Techniques

[+] Author Affiliations
S. Boujemaa, A. Gharbi

Campus Universitaire Le Belvédère, Tunis, Tunisie

M. Amielh, F. Anselmet

Institut de Recherche sur les Phénomènes Hors Equilibre, Marseille Cedex, France

Paper No. FEDSM2002-31161, pp. 95-101; 7 pages
doi:10.1115/FEDSM2002-31161
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 2: Symposia and General Papers, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3616-9 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

This experimental study is concerned with the effect of density variations on the development of a turbulent jet. Our interest concerns the large turbulent scales in order to understand how density variations affect these structures involved in the mixing process. The integral scale evolutions are estimated from laser velocimetry measurements (PIV or LDV). Comparisons between the results obtained in an air jet and a helium jet are given in the development zone (X/Dj < 20), so that the effect of strong density variations (ratio 1 to 7) on these scales is deduced.

Copyright © 2002 by ASME
Topics: Density , Lasers , Turbulence , Jets

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