A numerical analysis of reaction-diffusion effects on species mixing rates in turbulent premixed methane-air combustion
A numerical analysis of reaction-diffusion effects on species mixing rates in turbulent premixed methane-air combustion
Reactive scalar mixing time scale have been investigated in direct numerical simulation data for turbulent premixed Bunsen flames with reduced methane-air chemistry. Previous conclusions from single step chemistry studies are confirmed regarding the role of dilatation and turbulence-chemistry interactions on the progress variable dissipation rate. Compared to the progress variable, the mixing rates of intermediate species can be several times greater. The variation of species mixing rates are explained with reference to the structure of one-dimensional flamelets. A new model is produced for the ratios of scalar mixing time scales which can be applied, for example, in transported probability density function simulations.
Richardson, E.S.
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Sankaran, R.
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Grout, R.W.
80b4fc77-9aad-45e9-b160-99251d3338ac
Chen, J.H.
fd295f97-acff-4984-a655-ee18d3b2a734
2009
Richardson, E.S.
a8357516-e871-40d8-8a53-de7847aa2d08
Sankaran, R.
7b937918-e417-409c-99e4-26c3a4ad154f
Grout, R.W.
80b4fc77-9aad-45e9-b160-99251d3338ac
Chen, J.H.
fd295f97-acff-4984-a655-ee18d3b2a734
Richardson, E.S., Sankaran, R., Grout, R.W. and Chen, J.H.
(2009)
A numerical analysis of reaction-diffusion effects on species mixing rates in turbulent premixed methane-air combustion.
6th US National Combustion Meeting, Ann Arbor, United States.
17 - 20 May 2009.
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Conference or Workshop Item
(Paper)
Abstract
Reactive scalar mixing time scale have been investigated in direct numerical simulation data for turbulent premixed Bunsen flames with reduced methane-air chemistry. Previous conclusions from single step chemistry studies are confirmed regarding the role of dilatation and turbulence-chemistry interactions on the progress variable dissipation rate. Compared to the progress variable, the mixing rates of intermediate species can be several times greater. The variation of species mixing rates are explained with reference to the structure of one-dimensional flamelets. A new model is produced for the ratios of scalar mixing time scales which can be applied, for example, in transported probability density function simulations.
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USNCM6_21D4.pdf
- Author's Original
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Published date: 2009
Venue - Dates:
6th US National Combustion Meeting, Ann Arbor, United States, 2009-05-17 - 2009-05-20
Organisations:
Engineering Science Unit
Identifiers
Local EPrints ID: 203197
URI: http://eprints.soton.ac.uk/id/eprint/203197
PURE UUID: 10955dec-e67a-4b02-ac85-6c303527daea
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Date deposited: 15 Nov 2011 15:29
Last modified: 15 Mar 2024 03:37
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Contributors
Author:
R. Sankaran
Author:
R.W. Grout
Author:
J.H. Chen
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