抄録
Coal is an important energy resource for future demand for electricity, as coal reserves are much more abundant than those of other fossil fuels. In pulverized coal fired power plants, it is very important to improve the combustion efficiency and the reduction of pollutants such as nitrogen oxide, sulfur oxide and ash particles. In order to achieve these requirements, understanding the pulverized coal combustion mechanism is necessary. However, the combustion process of the pulverized coal is not well clarified and physically modeled so far since pulverized coal combustion is so a complicated phenomenon that the maximum flame temperature exceeds 2000 ℃ and some substances which is difficult to be measured, for example, radical species and highly reactive solid particles are included. Accordingly, development of new combustion furnaces and burners requires high cost and takes a long period. In this study, a Large Eddy Simulation is applied to a pulverized coal combustion field.
