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Measurements and LES calculations of turbulent premixed flame propagation past repeated obstacles

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journal contribution
posted on 2011-11-24, 10:19 authored by Sreenivasa Rao Gubba, Salah Ibrahim, Weeratunge MalalasekeraWeeratunge Malalasekera, Assaad R. Masri
Measurements and large eddy simulations (LES) have been carried out for a turbulent premixed flame propagating past solid obstacles in a laboratory scale combustion chamber. The mixture used is a stoichiometric propane/air mixture, ignited from rest. A wide range of flow configurations are studied. The configurations vary in terms of the number and position of the built-in solid obstructions. The main aim of the present study is two folded. First, to validate a newly developed dynamic flame surface density (DFSD) model over a wide range of flow conditions. Second, to provide repeatable measurements of the flow and combustion in a well-controlled combustion chamber. A total of four groups are derived for qualitative and quantitative comparisons between predicted results and experimental measurements. The concept of groups offers better understanding of the flame-flow interactions and the impact of number and position of the solid baffle plates with respect to the ignition source. Results are presented and discussed for the flame structure, position, speed and accelerations at different times after ignitions. The pressure-time histories are also presented together with the regimes of combustion for all flow configurations during the course of flame propagation.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Combustion and Flame

Citation

GUBBA, S.R., IBRAHIM, S.S., MALALSEKERA, W., and MASRI, A.R., 2011. Measurements and LES calculations of turbulent premixed flame propagation past repeated obstacles. Combustion and Flame, 158 (12), pp. 2465–2481.

Publisher

© The Combustion Institute. Published by Elsevier Inc.

Version

  • AM (Accepted Manuscript)

Publication date

2011

Notes

This article was published in the journal, Combustion and Flame [© The Combustion Institute. Published by Elsevier Inc.] and the definitive version is available at: http://dx.doi.org/10.1016/j.combustflame.2011.05.008

ISSN

0010-2180

eISSN

1556-2921

Language

  • en