Integrated Computational/Experimental Study of Turbulence Modification and Mixing Enhancement in Swirling Jets

Abstract

Swirling jet flows have been studied experimentally and computationally and the results have been compared with theory. Three-component Laser Doppler Anemometry (LDA) measurements have been carried out for swirling jets of various strengths and swirl distributions. Radial profiles of velocity have been obtained from the jet exit to 50 diameters downstream. The experimental results are consistent with previous results and with similarity theory for weakly swirling turbulent jets. However, the parametric range and spatial domain of the current data set makes it suitable for validation. Computational simulations have also been performed using a combination of Reynolds Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) approaches. The results have been validated with experimental data and used to explore the mechanisms behind the increased mixing enhancement observed. The combined experimental/computational effort is still ongoing, but the experiences to date have demonstrated the effectiveness of such an approach.

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Document Details

Document Type
Technical Report
Publication Date
Jan 07, 2009
Accession Number
ADA495159

Entities

People

  • C. Zemtsop
  • D. Stanescu
  • J. Naughton
  • M. Stoellinger
  • Richard Semaan
  • S. Heinz

Organizations

  • University of Wyoming

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Computational Fluid Dynamics
  • Data Sets
  • Diameters
  • Equations
  • Experimental Data
  • Far Field
  • Fluid Dynamics
  • Fluid Flow
  • Large Eddy Simulation
  • Mathematics
  • Measurement
  • Mechanical Engineering
  • Near Field
  • Reynolds Number
  • Simulations
  • Turbulence
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Computational Fluid Dynamics (CFD)
  • Computational Modeling and Simulation

Technology Areas

  • Directed Energy