中文摘要：

模拟了劣质烟煤和无烟煤在1台300 MW四角切圆锅炉炉内分层混合燃烧的过程.模拟使用了两种方法：一种是双混合分数/PDF（Probability Density Function）方法,使用2种不同煤质特性的煤;另一种是单混合分数/PDF方法,将混煤当作一种单煤,使用质量加权平均的煤质特性进行计算.模拟及实际测量结果表明：在这种混烧方式下炉内温度及氧浓度分布呈现非均匀和对角对称的分布特征.双混合分数/PDF方法的模拟结果更符合混煤在炉内的实际燃烧过程.图6表1参11

英文摘要：

The combustion process in a 300 MW tangentially fired boiler furnace employing inferior bituminous coal and anthracite as fuel, injected at different floor levels, has been simulated in two ways. One way is calculation by the twomixture-fraction/probability density function approach, assuming the simultaneous presence of 2 kinds of coal of different property. Another way is using the single-mixture fraction/probability density function method, assuming a single coal blend of weighted average property. Simulation and actual test measured results show that the temperature and the oxygen concentration distribution in the furnace is nonuniform, but symmetric across comers and that the two-mixture-fraction / PDF calculation approach is more in conformity with the actual combustion process of coal blends. Figs 6, table 1 and refs 11.