煤粉工业锅炉燃烧的数值模拟

为了更好地把握锅炉的性能，应用Fluent软件对某新型高效煤粉工业锅炉内的燃烧过程进行了三维数值模拟.采用非预混燃烧模型模拟化学反应过程，用P-1辐射模型计算辐射传热，用Realizable κ-ε湍流模型模拟气相运动，对固体颗粒相的求解采用随机轨道模型.模拟所得到的炉内温度场、离散相和连续相轨迹分布合理，温度场和实测值较为吻合.模拟结果表明，通过适当降低锅炉的负荷，能够进一步改善煤粉燃烧温度场分布.

Numerical simulation of combustion in the industial pulverized coal boiler

The software Fluent was used to simulate the coal powder combustion in three dimension for the better performance of the boiler.The non premixed combustion model and the P-1 radiation model were employed to simulate  the chemical reaction and heat transfer respectively. The gas phase transportation was simulated by the Realizable κ-ε turbulence model while particle phase used the stochastic model. The distribution of the temperature in the furnace is agreement with the measured values. The simulation results show that it can get a better distribution of the temperature in the furnace by reducing the load of the boiler.