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Wavelet Multi-Resolution Analysis of Coherent Structure in a Jet Issuing From Rotating Circular Pipe With Inclined Section

[+] Author Affiliations
Masahiro Nakashima, Takahide Tabata

Kagoshima National College of Technology, Hayato, Kagoshima, Japan

Hui Li, Tsutomu Nozaki

Kagoshima University, Kagoshima, Kagoshima, Japan

Paper No. FEDSM2002-31116, pp. 1571-1575; 5 pages
doi:10.1115/FEDSM2002-31116
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 1: Fora, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3615-0 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

The flow feature of the jet issuing from the circular pipe with the rotating inclined section has been investigated by the method of the flow visualization and the image processing. It has been found that the jet diffusion is affected by the inclined angle and the rotating speed. The coherent structure of the jet has been also studied by using the wavelet multi-resolution analysis. The multi-scale turbulent structures were visualized and the core and edge of the vortex were identified at different broad scales.

Copyright © 2002 by ASME

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