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Dynamical behaviour of counter-curren axisymmetric shear flows

  • Xilin Xie
  • Weiwei Ma
  • Huiliang Zhou 
Conference paper
Part of the Fluid Mechanics and Its Applications book series (FMIA, volume 71)

Abstract

The dynamical behaviour of coherent structures in counter-current axisymmetric shear flow has been experimentally studied. Two kinds of vortices, i.e., axisymmetric and helical structures, were discovered with respect to different regimes in the forward velocity versus velocity ratio diagram. On axisymmetric structures, two global self-excited oscillation modes referred to as the shear layer and jet column modes could be set in the flow system and the effect of the velocity ratio on the dynamical behaviour of this kind of structures could be concluded as the principle of relative movement. On helical structures, it is a kind of streamwise vortex structures resulting from the jet column bifurcations whose temporal asymptotic behaviour could be described as a 2-torus.

Keywords

Shear Layer Hopf Bifurcation Coherent Structure Helical Structure Velocity Ratio 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Xilin Xie
    • 1
  • Weiwei Ma
    • 2
  • Huiliang Zhou 
    • 1
  1. 1.Department of Mechanics & Engineering ScienceShanghaiP.R.China
  2. 2.College of Basic ScienceDonghua UniversityShanghaiP.R. China

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