Large Eddy Simulation of non-reacting gas flow in a 40 MW pulverised coal combustor. (7th October 2011)

• Record Type: Journal Article
• Authors: Stein, O.T.; Kempf, A.M.; Ma, T.; Olbricht, C.; Duncan, A.; Lewis, G.D.
• Is Part Of: Progress in computational fluid dynamics. Volume 11:Number 6(2011)
• Page Start: 397
• Page End: 402
• Publication Date: 2011-10-07
• Subjects: LES -- large eddy simulation -- RANS -- Reynolds-averaged Navier?Stokes -- CFD -- computational fluid dynamics -- coal combustion -- oxyfuel -- non-reacting ?ows -- unsteady ?ow -- coal ?ame stabilisation; Fluid dynamics -- Data processing -- Periodicals; Fluid dynamics -- Mathematics -- Periodicals; 620.10640285
• Languages: English
• ISSNs: 1468-4349

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.