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Hydrogen-enriched non-premixed jet flames: compositional structures with near-wall effects

Hydrogen-enriched non-premixed jet flames: compositional structures with near-wall effects
Hydrogen-enriched non-premixed jet flames: compositional structures with near-wall effects
The species concentrations of non-premixed hydrogen and syngas flames were examined using results obtained from direct numerical simulation technique with flamelet generated manifold chemistry. Flames with pure H2 and H2/CO mixtures are discussed for an impinging jet flame configuration. Single-point data analyses are presented illustrating the effects of fuel composition on species concentrations. In general, scatterplots of all species show the effects of fuel variability on the flame compositional structures. The behaviours of major combustion products and key radicals species indicate the effects of CO concentration on the H2/CO syngas combustion. In particular, high concentration of CO tends to induce local extinction in the H2/CO flames in which critical chemical reactions of the fuel mixture such as CO + OH become important. The unsteady fluctuations of species profiles in the wall jet region characterise the complexity of the distributions of compositional structures in the near-wall region with respect to the effects of CO concentration on the combustion of hydrogen-enriched fuels.
hydrogen, syngas, single-point analysis, species concentrations, radicals
0360-3199
5050-5164
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jiang, X.
008a11fa-f330-4355-b5c6-2878d1ab0f5c
van Oijen, J.A.
e6566136-6e12-416a-838f-2089a7ad8151
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jiang, X.
008a11fa-f330-4355-b5c6-2878d1ab0f5c
van Oijen, J.A.
e6566136-6e12-416a-838f-2089a7ad8151

Ranga Dinesh, K.K.J., Jiang, X. and van Oijen, J.A. (2013) Hydrogen-enriched non-premixed jet flames: compositional structures with near-wall effects. International Journal of Hydrogen Energy, 38 (12), 5050-5164. (doi:10.1016/j.ijhydene.2013.02.041).

Record type: Article

Abstract

The species concentrations of non-premixed hydrogen and syngas flames were examined using results obtained from direct numerical simulation technique with flamelet generated manifold chemistry. Flames with pure H2 and H2/CO mixtures are discussed for an impinging jet flame configuration. Single-point data analyses are presented illustrating the effects of fuel composition on species concentrations. In general, scatterplots of all species show the effects of fuel variability on the flame compositional structures. The behaviours of major combustion products and key radicals species indicate the effects of CO concentration on the H2/CO syngas combustion. In particular, high concentration of CO tends to induce local extinction in the H2/CO flames in which critical chemical reactions of the fuel mixture such as CO + OH become important. The unsteady fluctuations of species profiles in the wall jet region characterise the complexity of the distributions of compositional structures in the near-wall region with respect to the effects of CO concentration on the combustion of hydrogen-enriched fuels.

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e-pub ahead of print date: 13 March 2013
Published date: 22 April 2013
Keywords: hydrogen, syngas, single-point analysis, species concentrations, radicals
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 351814
URI: http://eprints.soton.ac.uk/id/eprint/351814
ISSN: 0360-3199
PURE UUID: c29b258b-ae93-445a-9c67-6f97a1b7dd7e
ORCID for K.K.J. Ranga Dinesh: ORCID iD orcid.org/0000-0001-9176-6834

Catalogue record

Date deposited: 25 Apr 2013 13:27
Last modified: 07 Aug 2019 00:33

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