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

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.

[1]  LES of the Sydney swirl flame series: A study of vortex breakdown in isothermal and reacting flows , 2007 .

[2]  Johannes Janicka,et al.  Efficient Generation of Initial- and Inflow-Conditions for Transient Turbulent Flows in Arbitrary Geometries , 2005 .

[3]  W. Jones,et al.  Large eddy simulation of a model gas turbine combustor , 2004 .

[4]  Hisao Makino,et al.  Large eddy simulation of a solid-fuel jet flame , 2003 .

[5]  O. Stein,et al.  Large eddy simulation of combustion in swirling and opposed jet flows , 2009 .

[6]  A. Sadiki,et al.  A digital filter based generation of inflow data for spatially developing direct numerical or large eddy simulations , 2003 .

[7]  Bruno Coriton,et al.  Large-Eddy Simulation and experiments on non-premixed highly turbulent opposed jet flows , 2011 .

[8]  Joseph C. Oefelein,et al.  Large eddy simulation of swirling particle-laden flow in a model axisymmetric combustor , 2007 .

[9]  Heinz Pitsch,et al.  Prediction of extinction and reignition in nonpremixed turbulent flames using a flamelet/progress variable model. 2. Application in LES of Sandia flames D and E , 2008 .

[10]  Heinz Pitsch,et al.  Prediction of extinction and reignition in nonpremixed turbulent flames using a flamelet/progress variable model: 1. A priori study and presumed PDF closure , 2008 .

[11]  Andreas Kempf.  Large eddy simulation of non-premixed turbulent flames , 2004 .

[12]  W. K. Bushe,et al.  Large eddy simulation of a turbulent reacting jet with conditional source-term estimation , 2001 .

[13]  W. Malalasekera,et al.  Large Eddy Simulations of Swirling Non-premixed Flames With Flamelet Models: A Comparison of Numerical Methods , 2008 .

[14]  S E Gant,et al.  Reliability Issues of LES-Related Approaches in an Industrial Context , 2010 .