Analysis of turbulent flame propagation in equivalence ratio-stratified flow
Analysis of turbulent flame propagation in equivalence ratio-stratified flow
Effects of equivalence ratio stratification on turbulent combustion processes are investigated using Direct Numerical Simulation. The simulation results are analysed in terms of flame surface area and the burning intensity. The local effects of stratification are then investigated further by examining statistics of the displacement speed conditioned on the flame-normal equivalence ratio gradient. The local burning intensity is found to depend on the orientation of the stratification with respect to the flame front, so that burning intensity is enhanced when the flame speed in the products is faster than in the reactants. The flame surface area is also influenced by equivalence ratio stratification and this may be explained by differences in the surface averaged consumption speed and differential propagation effects due to flame speed variations associated with equivalence ratio fluctuations
Richardson, E.S.
a8357516-e871-40d8-8a53-de7847aa2d08
Chen, J.H.
fd295f97-acff-4984-a655-ee18d3b2a734
30 March 2015
Richardson, E.S.
a8357516-e871-40d8-8a53-de7847aa2d08
Chen, J.H.
fd295f97-acff-4984-a655-ee18d3b2a734
Richardson, E.S. and Chen, J.H.
(2015)
Analysis of turbulent flame propagation in equivalence ratio-stratified flow.
7th European Combustion Meeting, Budapest, Hungary.
30 Mar - 02 Apr 2015.
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Conference or Workshop Item
(Other)
Abstract
Effects of equivalence ratio stratification on turbulent combustion processes are investigated using Direct Numerical Simulation. The simulation results are analysed in terms of flame surface area and the burning intensity. The local effects of stratification are then investigated further by examining statistics of the displacement speed conditioned on the flame-normal equivalence ratio gradient. The local burning intensity is found to depend on the orientation of the stratification with respect to the flame front, so that burning intensity is enhanced when the flame speed in the products is faster than in the reactants. The flame surface area is also influenced by equivalence ratio stratification and this may be explained by differences in the surface averaged consumption speed and differential propagation effects due to flame speed variations associated with equivalence ratio fluctuations
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ECM2015_Richardson_Chen_final.pdf
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Published date: 30 March 2015
Venue - Dates:
7th European Combustion Meeting, Budapest, Hungary, 2015-03-30 - 2015-04-02
Organisations:
Aerodynamics & Flight Mechanics Group
Identifiers
Local EPrints ID: 381693
URI: http://eprints.soton.ac.uk/id/eprint/381693
PURE UUID: cf40befc-a512-419c-a555-81632b4be394
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Date deposited: 09 Oct 2015 14:26
Last modified: 15 Mar 2024 03:37
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Author:
J.H. Chen
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