The University of Southampton
University of Southampton Institutional Repository

LES of turbulent swirling flames: a tool for gas turbine combustor simulations

LES of turbulent swirling flames: a tool for gas turbine combustor simulations
LES of turbulent swirling flames: a tool for gas turbine combustor simulations
Large eddy simulations (LES) of turbulent non-premixed swirling flames with strong emphasis on jet precession, recirculation and vortex breakdown have been investigated. LES techniques have been applied to predict several flames based on the Sydney swirl burner experiments. We solve numerically the governing equations for continuity, momentum and mixture fraction on a structured Cartesian grid, along with the Smagorinsky eddy viscosity model with dynamic procedure as the subgrid scale turbulence model. Finally, the conserved scalar mixture fraction based thermo-chemical variables are described using the steady laminar flamelet model. Results show that LES successfully predicts both the upstream first recirculation zone generated by the bluff body and the downstream second recirculation zone attributed to the vortex breakdown. Generated frequency spectrums demonstrate low frequency oscillations and the existence of precession in the centre jet which agrees very well with the experiment. The scalar predictions are also successful at the most axial locations away from the inlet. Additionally, the study further highlights the predictive capabilities of LES on jet precession with the laminar flamelet model providing a good technique for capturing the basic swirling flame structure.
swirl, vortex breakdown, recirculation, combustion, precession
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jenkins, K.W
eec6783a-46fd-4386-9346-52bd81875ce2
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jenkins, K.W
eec6783a-46fd-4386-9346-52bd81875ce2

Ranga Dinesh, K.K.J. and Jenkins, K.W (2008) LES of turbulent swirling flames: a tool for gas turbine combustor simulations. Cranfield Multi-Strand Conference: Creating Wealth Through Research and Innovation (CMC 2008), Cranfield, United Kingdom. 06 - 07 May 2008. 7 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Large eddy simulations (LES) of turbulent non-premixed swirling flames with strong emphasis on jet precession, recirculation and vortex breakdown have been investigated. LES techniques have been applied to predict several flames based on the Sydney swirl burner experiments. We solve numerically the governing equations for continuity, momentum and mixture fraction on a structured Cartesian grid, along with the Smagorinsky eddy viscosity model with dynamic procedure as the subgrid scale turbulence model. Finally, the conserved scalar mixture fraction based thermo-chemical variables are described using the steady laminar flamelet model. Results show that LES successfully predicts both the upstream first recirculation zone generated by the bluff body and the downstream second recirculation zone attributed to the vortex breakdown. Generated frequency spectrums demonstrate low frequency oscillations and the existence of precession in the centre jet which agrees very well with the experiment. The scalar predictions are also successful at the most axial locations away from the inlet. Additionally, the study further highlights the predictive capabilities of LES on jet precession with the laminar flamelet model providing a good technique for capturing the basic swirling flame structure.

Text
__soton.ac.uk_ude_personalfiles_users_jkk1d12_mydesktop_RANGADINESH_SOTON2013TO2017_ConferencePapersforEprints_2008_Cranfield_2008.doc - Author's Original
Download (783kB)

More information

Published date: 2008
Venue - Dates: Cranfield Multi-Strand Conference: Creating Wealth Through Research and Innovation (CMC 2008), Cranfield, United Kingdom, 2008-05-06 - 2008-05-07
Keywords: swirl, vortex breakdown, recirculation, combustion, precession
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 347914
URI: http://eprints.soton.ac.uk/id/eprint/347914
PURE UUID: 1dc62b72-3f3a-4c18-a28b-0f20183c89c4
ORCID for K.K.J. Ranga Dinesh: ORCID iD orcid.org/0000-0001-9176-6834

Catalogue record

Date deposited: 13 Feb 2013 12:30
Last modified: 15 Mar 2024 03:46

Export record

Contributors

Author: K.W Jenkins

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×