Large eddy simulations (LES) are performed for single and multiphase jets in crossflow (JICF). The multiphase JICF are compared to the single-phase case for the same momentum and mass flow ratios but with droplets of different sizes. Multiphase JICF have stronger counterrotating vortex pairs (CVPs) than a corresponding single-phase JICF. Moreover, their trajectories are higher and their induced wakes weaker. The smaller the Stokes number of the droplets, the more the solution approaches the solution for single-phase flow. The computed results show the formation of a CVP and horseshoe vortices, which are convected downstream. LES also reveals the intermittent formation of upright wake vortices from the horseshoe vortices on the ground toward the CVP. The dispersion of polydisperse spray droplets is computed using the stochastic parcel method. Atomization and droplet breakup are modeled by a combination of the breakup model by Reitz and the Taylor analogy breakup model (see Caraeni, D., Bergström, C., and Fuchs, L., 2000, Flow, Turbul. Combust., 65(2), pp. 223–244). Evaporation and droplet collision are also modeled. The flow solver uses two-way coupling. Averages of the velocity and gaseous fuel mass fraction are computed. The single-phase JICF is validated against experimental data obtained by PIV. Additionally, the PDFs and frequency spectra are presented.
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January 2007
Technical Papers
A Comparison of Single and Multiphase Jets in a Crossflow Using Large Eddy Simulations
Mirko Salewski,
Mirko Salewski
Division of Fluid Mechanics, Department of Heat and Power Engineering,
e-mail: mirko.salewski@vok.lth.se
Lund Institute of Technology
, P.O. Box 118, 22100 Lund, Sweden
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Dragan Stankovic,
Dragan Stankovic
Division of Fluid Mechanics, Department of Heat and Power Engineering,
Lund Institute of Technology
, P.O. Box 118, 22100 Lund, Sweden
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Laszlo Fuchs
Laszlo Fuchs
Division of Fluid Mechanics, Department of Heat and Power Engineering,
Lund Institute of Technology
, P.O. Box 118, 22100 Lund, Sweden
Search for other works by this author on:
Mirko Salewski
Division of Fluid Mechanics, Department of Heat and Power Engineering,
Lund Institute of Technology
, P.O. Box 118, 22100 Lund, Swedene-mail: mirko.salewski@vok.lth.se
Dragan Stankovic
Division of Fluid Mechanics, Department of Heat and Power Engineering,
Lund Institute of Technology
, P.O. Box 118, 22100 Lund, Sweden
Laszlo Fuchs
Division of Fluid Mechanics, Department of Heat and Power Engineering,
Lund Institute of Technology
, P.O. Box 118, 22100 Lund, SwedenJ. Eng. Gas Turbines Power. Jan 2007, 129(1): 61-68 (8 pages)
Published Online: September 28, 2005
Article history
Received:
August 25, 2005
Revised:
September 28, 2005
Citation
Salewski, M., Stankovic, D., and Fuchs, L. (September 28, 2005). "A Comparison of Single and Multiphase Jets in a Crossflow Using Large Eddy Simulations." ASME. J. Eng. Gas Turbines Power. January 2007; 129(1): 61–68. https://doi.org/10.1115/1.2180810
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