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Influence of fuel variability on the characteristics of impinging non-premixed syngas burning

Influence of fuel variability on the characteristics of impinging non-premixed syngas burning
Influence of fuel variability on the characteristics of impinging non-premixed syngas burning
Investigations of instantaneous flame characteristics and near-wall heat transfer of syngas mixtures including H2-rich and H2-lean flames have been performed in an impinging non-premixed configuration for a Reynolds number of 2000 and a nozzle-to-plate distance of 4 jet nozzle diameters by direct numerical simulation and flamelet generated manifold chemistry. The results presented were obtained from simulations using a uniform Cartesian grid with 200 × 600 × 600 points. The spatial discretisation was carried out using a sixth-order accurate compact finite difference scheme and the discretised equations were advanced using a third-order accurate fully explicit compact-storage Runge–Kutta scheme. Results were discussed for the flame characteristics, reaction progress variable, velocity field and Nusselt number distributions. Significant differences have been found for the flame characteristics of syngas burning depending on the hydrogen, carbon monoxide, carbon dioxide and nitrogen percentages of the syngas mixture. High diffusivity in the H2-rich flame leads to form weaker vortical structures and thicker flames than those in the H2-lean flame. It has been observed that the maximum flame temperature decreases from the H2-rich to the H2-lean flames. It is also found that the maximum flame temperature occurs at the lean side of the stoichiometric mixture fraction of the syngas fuel mixtures. The composition of the syngas mixture has a significant impact on the flame characteristics of the impinging flame, including the near-wall flame structure and heat transfer.
1540-7489
3219-3229
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jiang, X
69bfa956-bad2-4c93-b007-7c2392ffbbdc
van Oijen, J.A.
e6566136-6e12-416a-838f-2089a7ad8151
Bastiaans, R.J.M.
677adf0a-d815-4289-b298-f8e6f7cc2656
de Goey, L.P.H.
b994c553-37c0-4f94-8ed7-843f42525151
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Jiang, X
69bfa956-bad2-4c93-b007-7c2392ffbbdc
van Oijen, J.A.
e6566136-6e12-416a-838f-2089a7ad8151
Bastiaans, R.J.M.
677adf0a-d815-4289-b298-f8e6f7cc2656
de Goey, L.P.H.
b994c553-37c0-4f94-8ed7-843f42525151

Ranga Dinesh, K.K.J., Jiang, X, van Oijen, J.A., Bastiaans, R.J.M. and de Goey, L.P.H. (2013) Influence of fuel variability on the characteristics of impinging non-premixed syngas burning. Proceedings of the Combustion Institute, 34 (2), 3219-3229. (doi:10.1016/j.proci.2012.06.081).

Record type: Article

Abstract

Investigations of instantaneous flame characteristics and near-wall heat transfer of syngas mixtures including H2-rich and H2-lean flames have been performed in an impinging non-premixed configuration for a Reynolds number of 2000 and a nozzle-to-plate distance of 4 jet nozzle diameters by direct numerical simulation and flamelet generated manifold chemistry. The results presented were obtained from simulations using a uniform Cartesian grid with 200 × 600 × 600 points. The spatial discretisation was carried out using a sixth-order accurate compact finite difference scheme and the discretised equations were advanced using a third-order accurate fully explicit compact-storage Runge–Kutta scheme. Results were discussed for the flame characteristics, reaction progress variable, velocity field and Nusselt number distributions. Significant differences have been found for the flame characteristics of syngas burning depending on the hydrogen, carbon monoxide, carbon dioxide and nitrogen percentages of the syngas mixture. High diffusivity in the H2-rich flame leads to form weaker vortical structures and thicker flames than those in the H2-lean flame. It has been observed that the maximum flame temperature decreases from the H2-rich to the H2-lean flames. It is also found that the maximum flame temperature occurs at the lean side of the stoichiometric mixture fraction of the syngas fuel mixtures. The composition of the syngas mixture has a significant impact on the flame characteristics of the impinging flame, including the near-wall flame structure and heat transfer.

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Published date: 2013
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 347367
URI: http://eprints.soton.ac.uk/id/eprint/347367
ISSN: 1540-7489
PURE UUID: b74671a8-79b8-4ccb-b09f-565de950b803
ORCID for K.K.J. Ranga Dinesh: ORCID iD orcid.org/0000-0001-9176-6834

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Date deposited: 21 Jan 2013 16:32
Last modified: 05 Nov 2019 01:37

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