Pulverised coal combustion (PCC) dominates the global sources of primary energy required to meet the demand for electrical base load power. Despite recent efforts to mitigate the adverse effects of thermal coal conversion such as pollutant formation and climate change, further research on the underlying physical and chemical processes of PCC is needed. PCC is a complex multiphase problem, which can be split into turbulent flow, particle transport, pyrolysis, volatile combustion, char conversion and thermal radiation. The large eddy simulation (LES) technique provides an accurate framework for the numerical simulation of turbulent flow, which is responsible for the mixing of fuel (volatiles and char off-gases) with the oxidiser stream(s) inside the furnace. The details of this turbulent fuel/oxidiser mixing ultimately determine the ignition and flame stabilisation of pulverised coal flames. This project extends the LES method, which is fairly established for pure gas flames, to pulverised coal flames and to validate the LES results against well-established experimental data on the laboratory and pilot scale.
- Y. Chen, O. T. Stein, A. Kronenburg, J. Xing, K. Luo, K. H. Luo, and C. Hasse, “Analysis of Gas-Assisted Pulverized Coal Combustion in Cambridge Coal Burner CCB1 Using FPV-LES,” Energy & Fuels, vol. 34, pp. 7477–7489, (2020).
- G. Olenik, O. T. Stein, and A. Kronenburg, “LES of swirl-stabilised pulverised coal combustion in IFRF furnace No. 1,” Proc. Combust. Inst., vol. 35, pp. 2819–2828, (2015).
- G. Olenik, O. T. Stein, and A. Kronenburg, “LES of an industrial scale swirled pulverised coal furnace,” in 26th German Flame Day, VDI-Tagungsband 2161:235-242, (2013).
- O. T. Stein, G. Olenik, A. Kronenburg, F. Cavallo Marincola, B. M. Franchetti, A. M. Kempf, M. Ghiani, M. Vascellari, and C. Hasse, “Towards Comprehensive Coal Combustion Modelling for LES,” Flow, Turbul. Combust., vol. 90, pp. 859–884, Jun. (2013).
- G. Olenik, O. T. Stein, and A. Kronenburg, “LES of a piloted pulverized coal jet,” in 1st ERCOFTAC Conf. on Simul. of Multiphase Flows in Gasific. and Combust., Dresden, Germany, (2011).