A flamelet/progress variable approach for modeling coal particle ignition

Detailed simulations for flamelet modelling of SOx formation from coal

“…Recently a number of fully-resolved simulations of single particles [8][9][10][11] and coal particle arrays [12][13][14] have been performed. Vascellari et al [8] pioneered the work on fully-resolved simulations of single coal particle ignition experiments [15] for flamelet modelling.…”

“…Tufano et al [9] conducted fully-resolved simulations of single coal particle ignition experiments [15] in various gas atmospheres. Vascellari et al [11] modelled the fully-resolved data of [9] with a flamelet approach, in both a priori and a posteriori simulations. The experimental trends of ignition delay times in various N 2 /O 2 /CO 2 mixtures were captured and the sensitivity of absolute ignition delay time predictions to gas phase chemistry, particle Reynolds number Re p , particle preheat and extraction criteria for ignition delay were highlighted.…”

“…The experimental trends of ignition delay times in various N 2 /O 2 /CO 2 mixtures were captured and the sensitivity of absolute ignition delay time predictions to gas phase chemistry, particle Reynolds number Re p , particle preheat and extraction criteria for ignition delay were highlighted. Vascellari et al [11] modelled the fully-resolved data of [9] with a flamelet approach, in both a priori and a posteriori simulations. The flamelet table was based on unsteady laminar diffusion flamelets and a novel theoretical formulation of the scalar dissipation rate in the vicinity of single particles allowed for accurate flamelet predictions of the ignition process.…”

Numerical Analysis of a Turbulent Pulverized Coal Flame Using a Flamelet/Progress Variable Approach and Modeling Experimental Artifacts

“…Vascellari et al used an extended FPV approach in fully resolved simulations to correctly reproduce the flame structure of single-coal particles before and during the ignition process. 18 Wen et al performed fully resolved laminar counterflow PCC flame simulations with FPV and compared their results to the results from simulations with detailed chemistry integration, finding a good agreement. 19 Rieth et al tested the FPV approach performing carrier-phase DNS of a reacting mixing layer with entrained coal particles.…”

“…They extended the model to include another mixture fraction for coal moisture and tested it on a laboratory coal jet flame, obtaining good results in terms of ignition. Vascellari et al used an extended FPV approach in fully resolved simulations to correctly reproduce the flame structure of single-coal particles before and during the ignition process . Wen et al performed fully resolved laminar counterflow PCC flame simulations with FPV and compared their results to the results from simulations with detailed chemistry integration, finding a good agreement .…”