A COMPUTATIONAL COMBUSTION METHOD FOR TURBULENT PULVERIZED SOLID FUEL USING LES

Abstract

The solid fuels are still used in many regions of the world and assures the energy production. Nowadays, the mitigation of climate changes require strict regulations regarding the use and efficient combustion of solid fuels such as coal and reduction of the emissions. One way to ensure reduction of the emissions is an efficient combustion, which can be obtained using the pulverized coal. The pulverized coal ensure the good mixing of the fuel and air reactants and thus, it ensures an efficient combustion and minimization of the emissions. Experimental studies of solid fuels combustion are challenging and costly. Therefore, the computational methods offer the advantage of fast and accurate predictions of the flow variables and combustion products. In this study we propose a computational method using the large-eddy simulation (LES) approach along with the flamet combustion model. The study shows that the LES approach along with the flamet model predict very well the flow variables and combustion products. The study reveals an increase of entropy and decrease of density in the combustion region. As the flame moves towards the exit of the combustion the temperature decreases.