Free Lagrange simulations of flame/vortex interactions, including detailed finite rate chemical kinetics and heat release
Free Lagrange simulations of flame/vortex interactions, including detailed finite rate chemical kinetics and heat release
New chemical kinetics (Sunicks) and transport solvers (Sunids) are presented for use with a recently published Free-Lagrange flow solver (Vucalm). The combined solvers provide a novel solving technique for the resolution of reacting flows. The kinetics and transport solvers are developed and successfully validated against analytical and published data. Following validation, the coupled solvers are used to calculate vortex interactions for a methane-air diffusion flame, using detailed chemical kinetics and multi-component diffusion. The reacting flow for a two dimensional, generic IDI-diesel configuration is simulated. Large scale effects of the flame-vortex interaction are well represented, but due to an elementary treatment of turbulence small scale effects on the kinetics are not and the calculation is qualitative.
The subsequent calculations simulate a methane-air flame in a counterflow configuration, and as the flow field is laminar the calculation is considered to be quantitative. Following the establishment of a near steady flame it is interacted with vortices, blown onto it from the air side. The simulations presented show flame-vortex entrainment, associated local extinctions and effects on NOx chemistry. The calculations give insight into the mechanisms of flame-vortex interaction and highlight the Free-Lagrange method as being a highly efficient technique for resolution of transient reacting flow fields, particularly those containing diffusion flames.
University of Southampton
1997
Loyez, Marc Jason
(1997)
Free Lagrange simulations of flame/vortex interactions, including detailed finite rate chemical kinetics and heat release.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
New chemical kinetics (Sunicks) and transport solvers (Sunids) are presented for use with a recently published Free-Lagrange flow solver (Vucalm). The combined solvers provide a novel solving technique for the resolution of reacting flows. The kinetics and transport solvers are developed and successfully validated against analytical and published data. Following validation, the coupled solvers are used to calculate vortex interactions for a methane-air diffusion flame, using detailed chemical kinetics and multi-component diffusion. The reacting flow for a two dimensional, generic IDI-diesel configuration is simulated. Large scale effects of the flame-vortex interaction are well represented, but due to an elementary treatment of turbulence small scale effects on the kinetics are not and the calculation is qualitative.
The subsequent calculations simulate a methane-air flame in a counterflow configuration, and as the flow field is laminar the calculation is considered to be quantitative. Following the establishment of a near steady flame it is interacted with vortices, blown onto it from the air side. The simulations presented show flame-vortex entrainment, associated local extinctions and effects on NOx chemistry. The calculations give insight into the mechanisms of flame-vortex interaction and highlight the Free-Lagrange method as being a highly efficient technique for resolution of transient reacting flow fields, particularly those containing diffusion flames.
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Published date: 1997
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Local EPrints ID: 463059
URI: http://eprints.soton.ac.uk/id/eprint/463059
PURE UUID: c77a1bf7-02e4-42bc-b92d-824441be04aa
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Date deposited: 04 Jul 2022 20:43
Last modified: 04 Jul 2022 20:43
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Author:
Marc Jason Loyez
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