Abstract
This study developed a mathematical model of solid coal combustion in long-burning boilers and analyzed the influence of chemical reactions and heat transfer processes. The model is based on Reynolds-averaged Navier-Stokes equations (RANS), closed using a k-ε realizable turbulence model. The dynamics of coal particles are described using a discrete phase model (DPM). A numerical simulation of the combustion process was performed, followed by a comparison of the calculated data with experimental results. Thestudy shows a good agreement between temperature fields and the main flow parameters obtained numerically and experimentally. The conducted validation confirms the reliability and accuracy of the developed mathematical model.