Simulations of edge-flame propagation in turbulent non-premixed jets
Simulations of edge-flame propagation in turbulent non-premixed jets
Ignition, flame propagation and stabilisation have been simulated and analysed in a turbulent jet of non-premixed methane and air. The first order Conditional Moment Closure (CMC) turbulent combustion model was fully coupled with a Reynolds-Averaged Navier Stokes (RANS) flow simulation. A CMC model was developed to account for spark ignition. The over-prediction of turbulent flame propagation was attributed to the limitations of the first order reaction rate closure, and of the RANS description of the flow in the presence of thermal expansion around the flame front. A new model for the effects of counter gradient turbulent transport in partially premixed flows was implemented and the modification of the flame front was presented. The coupled CMC-CFD model successfully captures the physics necessary to represent unsteady flame evolution and hence may be used for simulation of ignition in practical combustor designs.
Richardson, E.S.
a8357516-e871-40d8-8a53-de7847aa2d08
Mastorakos, E.
159653c4-33f6-4f4a-8f79-4751bfd4ba64
11 April 2007
Richardson, E.S.
a8357516-e871-40d8-8a53-de7847aa2d08
Mastorakos, E.
159653c4-33f6-4f4a-8f79-4751bfd4ba64
Richardson, E.S. and Mastorakos, E.
(2007)
Simulations of edge-flame propagation in turbulent non-premixed jets.
ECM2007: 3rd European Combustion Meeting, Chaniá, Greece.
11 - 13 Apr 2007.
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Conference or Workshop Item
(Paper)
Abstract
Ignition, flame propagation and stabilisation have been simulated and analysed in a turbulent jet of non-premixed methane and air. The first order Conditional Moment Closure (CMC) turbulent combustion model was fully coupled with a Reynolds-Averaged Navier Stokes (RANS) flow simulation. A CMC model was developed to account for spark ignition. The over-prediction of turbulent flame propagation was attributed to the limitations of the first order reaction rate closure, and of the RANS description of the flow in the presence of thermal expansion around the flame front. A new model for the effects of counter gradient turbulent transport in partially premixed flows was implemented and the modification of the flame front was presented. The coupled CMC-CFD model successfully captures the physics necessary to represent unsteady flame evolution and hence may be used for simulation of ignition in practical combustor designs.
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ECM07_CMC_of_jet_ignition.pdf
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Published date: 11 April 2007
Venue - Dates:
ECM2007: 3rd European Combustion Meeting, Chaniá, Greece, 2007-04-11 - 2007-04-13
Organisations:
Engineering Science Unit
Identifiers
Local EPrints ID: 203181
URI: http://eprints.soton.ac.uk/id/eprint/203181
PURE UUID: f3d2b2f8-1ba2-49fb-ac4a-6b8ff407a518
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Date deposited: 15 Nov 2011 14:30
Last modified: 15 Mar 2024 03:37
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Author:
E. Mastorakos
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