Title: Large Eddy Simulation of non-reacting gas flow in a 40 MW pulverised coal combustor

Authors: O.T. Stein; A.M. Kempf; T. Ma; C. Olbricht; A. Duncan; G.D. Lewis

Addresses: Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK. ' Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK. ' Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK. ' Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK. ' Doosan Power Systems Ltd., Porter?eld Road, Renfrew, PA4 8DJ, UK. ' Doosan Power Systems Ltd., Porter?eld Road, Renfrew, PA4 8DJ, UK

Abstract: The Large Eddy Simulation (LES) of non-reacting ?ow in a full-scale single coal burner test facility is presented. The LES was run with the in-house code PsiPhi of Imperial College, using immersed boundary conditions and the Smagorinsky model. The burner quarl and upstream furnace were discretised with 45 million uniform cubic cells. The LES reveals highly unsteady ?ow and identi?es major recirculation zones crucial for coal ?ame stabilisation. LES results show a good accordance with available Reynolds-Averaged Navier–Stokes (RANS) data from FLUENT. The cost of the LES is reasonable (2 weeks CPU time, 4 nodes) given the wealth of time-resolved data it provides.

Keywords: LES; large eddy simulation; RANS; Reynolds-averaged Navier–Stokes; CFD; computational fluid dynamics; coal combustion; oxyfuel; non-reacting ?ows; unsteady ?ow; coal ?ame stabilisation.

DOI: 10.1504/PCFD.2011.042849

Progress in Computational Fluid Dynamics, An International Journal, 2011 Vol.11 No.6, pp.397 - 402

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 06 Oct 2011 *

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