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Jet characteristics in confined swirling flow

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Abstract

Jets in confined swirling flow are investigated in a facility where the swirling flow in the tube is produced by a vane-type swirler. The jet is located centrally in the swirler, and the diameter ratio of the tube to the jet is ∼ 14. Both the jet and the swirling flow are fully turbulent. Results show that the confined jet is highly dissipative in nature. Consequently, the flow in the tube does not resemble a free jet with axial pressure gradient. The presence of swirl increases the rate of dissipation and the jet decays even faster. A fairly isotropic turbulence field is observed in the confined swirling flow. However, the introduction of the jet does not significantly affect this behavior and near isotropy of the turbulence field is again observed at ∼ 30 jet diameters downstream.

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Author notes

  1. H. C. Mongia

    Present address: Allison Gas Turbine Operation, P.O. Box 420, 46206, Indianapolis, In, USA

Authors and Affiliations

  1. Mechanical and Aerospace Engineering Department, Arizona State University, 85287, Tempe, AZ, USA

    R. M. C. So, S. A. Ahmed & H. C. Mongia

Authors
  1. R. M. C. So
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  2. S. A. Ahmed
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  3. H. C. Mongia
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So, R.M.C., Ahmed, S.A. & Mongia, H.C. Jet characteristics in confined swirling flow. Experiments in Fluids 3, 221–230 (1985). https://doi.org/10.1007/BF00265105

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  • DOI: https://doi.org/10.1007/BF00265105

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