Confined Jets in a Diverging Duct

  • G. Binder
  • K. Kian
Part of the International Union of Theoretical and Applied Mechanics book series (IUTAM)


Axi-symmetric turbulent confined jets in a diverging duct have been investigated experimentally by means of pressure measurements, laser Doppler velocimetry and flow visualizations. It is shown that the 2.5° angle divergence of the duct has an important effect on the flow especially when the inlet conditions lead to recirculation: the recirculation eddies extend jurther upstream and have larger volume flow, the pressure rise is steeper and higher and the jet expands faster than in constant area ducts flows with identical inlet conditions. The turbulent characteristics depart significantly from those of the free jet. The overall flow pattern is highly unsteady in the presence of recirculation.


Pressure Rise Ambiant Flow Turbulent Shear Stress Secondary Stream Positive Pressure Gradient 
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Copyright information

© Springer, Berlin Heidelberg New York 1983

Authors and Affiliations

  • G. Binder
    • 1
  • K. Kian
    • 1
  1. 1.Institut de Mécanique (Associé au C.N.R.S.)Université Scientifique et Médicale et Institut National Polytechnique de GrenobleGrenoble CedexFrance

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