Large Eddy Simulation of a Novel Gas-Assisted Coal Combustion Chamber

Numerical investigation of failure evolution for the surrounding rock of a super‐large section chamber group in a deep coal mine

“…Coal resources account for 70% and 60% of the primary energy production and consumption structure, respectively, and they have always been the main energy source of China. In recent years, the mining scale and intensity of coal mines have gradually increased with the prosperity of coal production each year, and many large and super‐large section chambers and chamber groups have emerged . The cluster distribution of super‐large section chambers makes the interaction between the chambers fierce, and it is very easy to cause dynamic accidents such as roof fall and rib spalling.…”

Analysis of Gas-Assisted Pulverized Coal Combustion in Cambridge Coal Burner CCB1 Using FPV-LES

“…Yamamoto et al 25 simulated a coal jet flame in a lab-scale burner using FPV and an eddy dissipation concept model and found the FPV results to be closer to experimental data. Similarly, Rieth et al 26,27 and Knappstein et al 28,29 have demonstrated the high accuracy and computational affordability of flamelet methods for PCC-LES. Following up on this recent success of the FPV modelling framework, the FPV-LES method is employed to investigate PCC in the present study.…”

Detailed simulations for flamelet modelling of SOx formation from coal

“…Classically, turbulence closures for coal flames have been obtained in the Reynolds-Averaged Navier Stokes (RANS) framework [2]. More recently the potentially higher predictive capability of LES approaches for turbulence modelling has been investigated, where mostly flamelet approaches have been employed to model subgrid scale turbulence-chemistry interactions [3][4][5]. However, flamelet-LES modelling of PCC flames is not straightforward, since the mixing of several fuel (volatiles and char off-gases) and oxidiser streams needs to be accurately described [6] and because strong enthalpy changes due to gas-solid heat transfer must be considered [7].…”