Detailed investigation of a pulverized fuel swirl flame in CO2/O2 atmosphere

Large Eddy Simulation of a 100 kWth swirling oxy-coal furnace

“…1, and a more detailed description is given by Toporov et al [14]. The furnace is cylindrical with an inner diameter of 0.4 m and a vertical height of 2.1 m. The burner consists of four inlets, where the O 2 /CO 2 mixture enters.…”

“…The purpose of this study is to apply LES to an oxy-coal swirl burner. The 100 kW th OXYCOAL-AC test facility at the Aachen University [13,14] is an ideal test case thanks to the relatively large amount of quantitative experimental data available, and the fact that it is in the heart of the new large-scale research program "Transregio 129 Oxyflame" of Aachen, Bochum and Darmstadt Universities [www.oxyflame.de]. The OXYCOAL-AC burner has been previously modelled in a RANS framework [14,15].…”

“…The 100 kW th OXYCOAL-AC test facility at the Aachen University [13,14] is an ideal test case thanks to the relatively large amount of quantitative experimental data available, and the fact that it is in the heart of the new large-scale research program "Transregio 129 Oxyflame" of Aachen, Bochum and Darmstadt Universities [www.oxyflame.de]. The OXYCOAL-AC burner has been previously modelled in a RANS framework [14,15]. Chen et al [16] performed a LES with RANS-like symmetry conditions, where they simulated only a section of the burner and then transposed the results to the other sections using periodic boundary conditions, which made the simulations a↵ordable but suppresses some large-scale turbulent modes, and underpredicts the turbulent stresses on the periodic boundaries.…”

Laser diagnostics of pulverized coal combustion in O2/N2 and O2/CO2 conditions: velocity and scalar field measurements

“…The present work is an advancement of the initial work carried out by Pickett et al (1999), Hwang et al (2005), Toporov et al (2008) and Balusamy et al (2013) to demonstrate how Mie scatter/OH PLIF, LDV and LII can be used in the study of the structure of swirling, turbulent, oxygenenriched pulverized coal flames. Furthermore, this work identifies under which conditions OH PLIF and Mie scatter can be usefully employed in combination with LII to determine the extent of reaction, interpret the flame structure and heat release rate.…”

Numerical Analysis of Pulverised Coal Fired Boiler with Different Burner Geometries

“…1) have been modelled in three dimensions using FLUENT, the commercial CFD software from ANSYS, version 14. FLUENT has been utilized for the numerical study of pulverized coal combustion in the past [1,3,5] and proved to be efficient. For air-fired combustion, the Gli-Tunçbilek Turkish coals have been used.…”