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A comparison of a single- and multiphase jets in a crossflow using LES

Salewski, Mirko LU ; Stankovic, Dragan LU and Fuchs, Laszlo LU (2005) ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future In Proceedings of the ASME Turbo Expo 2. p.77-86
Abstract
Large eddy simulations are performed for a 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 counter-rotating 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 reveals also the intermittent formation of upright wake vortices from the horseshoe vortices on the ground towards... (More)
Large eddy simulations are performed for a 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 counter-rotating 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 reveals also the intermittent formation of upright wake vortices from the horseshoe vortices on the ground towards 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. 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. Copyright (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Mass fractions, Flow solvers, Mass flow ratios, Taylor analogy
in
Proceedings of the ASME Turbo Expo
volume
2
pages
77 - 86
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future
external identifiers
  • WOS:000243376400008
  • Scopus:27744468257
language
English
LU publication?
yes
id
d8babdb2-7ad0-4705-9f31-f7cdf4f4048a (old id 615601)
date added to LUP
2007-11-25 16:17:44
date last changed
2017-01-01 07:56:29
@inproceedings{d8babdb2-7ad0-4705-9f31-f7cdf4f4048a,
  abstract     = {Large eddy simulations are performed for a 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 counter-rotating 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 reveals also the intermittent formation of upright wake vortices from the horseshoe vortices on the ground towards 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. 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. Copyright},
  author       = {Salewski, Mirko and Stankovic, Dragan and Fuchs, Laszlo},
  booktitle    = {Proceedings of the ASME Turbo Expo},
  keyword      = {Mass fractions,Flow solvers,Mass flow ratios,Taylor analogy},
  language     = {eng},
  pages        = {77--86},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {A comparison of a single- and multiphase jets in a crossflow using LES},
  volume       = {2},
  year         = {2005},
}