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Comparison of RANS and LES turbulence models for predicting air-coal and oxy-coal combustion behaviours

Caridi, D, Couling, D, Gharebaghi, M, Gubba, SR, Irons, RMA, Ma, L, Pourkashanian, M, Pranzitelli, A and Williams, A (2011) Comparison of RANS and LES turbulence models for predicting air-coal and oxy-coal combustion behaviours. In: 2nd Oxyfuel Combustion Conference, 12 Sep 2011 - 16 Sep 2011 , Queensland, Australia.

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Abstract

It is commonly accepted that with existing physical sub-models, computational fluid dynamics (CFD) can offer significant insight to the complex combustion systems such as those found in the coal-fired power generation industry. With the growth of computing resources and, in particular, the availability of powerful computer clusters, application of Large Eddy Simulation (LES) emerges as an attractive option in modelling of turbulence combustions in coal-fired furnaces. This paper presents the results from a CFD simulation of the coal combustion processes, under both air-fired and oxy-fired conditions in a 1 MWth industrial combustion test facility. Both Reynolds Averaged Navier–Stokes (RANS) and LES approaches have been employed and the results are compared with each other and with experimental measurements. Advantages of the LES underlining its potential for future industrial applications are addressed. It is shown that validation a CFD model that is based on LES requires more detailed experimental data from well-controlled experimental measurements.

Item Type: Conference or Workshop Item (Paper)
Keywords: coal combustion, LES, CCS, CFD
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Process, Environmental and Materials Engineering (Leeds) > Centre for Computational Fluid Dynamics (Leeds)
Depositing User: Symplectic Publications
Date Deposited: 26 Aug 2011 10:31
Last Modified: 08 Feb 2013 17:33
Published Version: http://www.ieaghg.org/docs/General_Docs/OCC2/Abstr...
Status: Published
URI: http://eprints.whiterose.ac.uk/id/eprint/43158

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