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Hydrogen-enriched non-premixed jet flames: analysis of the flame surface, flame normal, flame index and Wobbe Index

Hydrogen-enriched non-premixed jet flames: analysis of the flame surface, flame normal, flame index and Wobbe Index
Hydrogen-enriched non-premixed jet flames: analysis of the flame surface, flame normal, flame index and Wobbe Index
A non-premixed impinging jet flame is studied using three-dimensional direct numerical simulation with detailed chemical kinetics in order to investigate the influence of fuel variability on flame surface, flame normal, flame index and Wobbe index for hydrogen-enriched combustion. Analyses indicate that the fuel composition greatly influences the hydrogen(H2)/carbon monoxide (CO) syngas combustion, not only on the important local stoichiometric iso-mixture fraction surface distribution but also on the vortical structures in the flow field. As a result of CO addition to hydrogen-rich combustion, changes of the reaction zone in the flammable layer, shift of peak flame surface density distribution, shift of non-premixed regions, formation of widely populated scalar dissipation distribution rate with respect to tangential strain and reduction of global heat release are all found to appear. In particular, the CO addition induces a micromixing process which appears to be an important factor for the modelling investigation of turbulence/chemistry interaction especially for combustion modelling of H2-rich syngas fuels.
hydrogen-rich syngas combustion, flame surface, flame normal, flame index, wobbe index, micromixing
0360-3199
6753-6763
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jiang, X
69bfa956-bad2-4c93-b007-7c2392ffbbdc
Van Oijen, J.A
57e7e907-4a20-4c77-be43-b3722516ea7f
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jiang, X
69bfa956-bad2-4c93-b007-7c2392ffbbdc
Van Oijen, J.A
57e7e907-4a20-4c77-be43-b3722516ea7f

Ranga Dinesh, K.K.J., Jiang, X and Van Oijen, J.A (2014) Hydrogen-enriched non-premixed jet flames: analysis of the flame surface, flame normal, flame index and Wobbe Index. International Journal of Hydrogen Energy, 39 (12), 6753-6763. (doi:10.1016/j.ijhydene.2014.01.208).

Record type: Article

Abstract

A non-premixed impinging jet flame is studied using three-dimensional direct numerical simulation with detailed chemical kinetics in order to investigate the influence of fuel variability on flame surface, flame normal, flame index and Wobbe index for hydrogen-enriched combustion. Analyses indicate that the fuel composition greatly influences the hydrogen(H2)/carbon monoxide (CO) syngas combustion, not only on the important local stoichiometric iso-mixture fraction surface distribution but also on the vortical structures in the flow field. As a result of CO addition to hydrogen-rich combustion, changes of the reaction zone in the flammable layer, shift of peak flame surface density distribution, shift of non-premixed regions, formation of widely populated scalar dissipation distribution rate with respect to tangential strain and reduction of global heat release are all found to appear. In particular, the CO addition induces a micromixing process which appears to be an important factor for the modelling investigation of turbulence/chemistry interaction especially for combustion modelling of H2-rich syngas fuels.

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e-pub ahead of print date: 20 February 2014
Published date: 15 April 2014
Keywords: hydrogen-rich syngas combustion, flame surface, flame normal, flame index, wobbe index, micromixing
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 369671
URI: http://eprints.soton.ac.uk/id/eprint/369671
ISSN: 0360-3199
PURE UUID: a39a029a-d121-4b6c-91be-0120da6e9569
ORCID for K.K.J. Ranga Dinesh: ORCID iD orcid.org/0000-0001-9176-6834

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Date deposited: 07 Oct 2014 14:16
Last modified: 29 Oct 2019 01:38

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Author: X Jiang
Author: J.A Van Oijen

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