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Proper Orthogonal Decomposition of Round Jet Turbulence Measured by Dynamic PIV

[+] Author Affiliations
W. Bi, Y. Sugii, K. Okamoto, H. Madarame

University of Tokyo, Tokai-mura, Ibaraki, Japan

Paper No. FEDSM2003-45217, pp. 2337-2343; 7 pages
doi:10.1115/FEDSM2003-45217
From:
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 1: Fora, Parts A, B, C, and D
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3696-7 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME

abstract

In this study, we have used Dynamic PIV to measure the time-resolved turbulent velocity distributions of the near field flow of round jet turbulence. The Dynamic PIV system allows capturing particle images with kilohertz frame rate, mega-pixel resolution and gigabyte memory. We apply the system to study the spatial and temporal evolution of the coherent vortical structures in the near field of the round jet. 2-D and 3-D Proper Orthogonal Decomposition (POD) are employed to extract the coherent structures. The 3-D POD shows advantages over 2-D POD. The spatial distribution and temporal evolution of the flow structures extracted by 3-D POD are uncovered.

Copyright © 2003 by ASME

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