分解炉内煤粉燃烧气固流场分布及NO生成的数值模拟

It is difficult to measure the flow of gas- solid phase for coal combustion. In order o predict the flow field and the rule of two phases concentration distribution, a model of a simplied coal combustion with FLUENT procedure was set up. The fuel composition was defined in PDF，standard k –ε and no-slip boundary condition were used for the gas phase turbulence . Coal particles phase makes use of stochastic tracking model. Second –step windward format, finite difference method and SIMPLE arithmetic were utilized to discrete and solve a reacting equation. The distribution of gas fraction was obtained, as well as the velocity contour and the distribution of temperature were displayed . The formation of NO was simulated as well. The process of combustion was showed and the mechanism of the formative NO was also simulated, which is conductive to reconstructing of the pulverized coal stove.