分级供氧气流床气化炉冷态流场的数值模拟与实验研究

摘要

Using standard k-s turbulence model and SIMPLE algorithm, simulate the cold flow field in entrained-flow gasifier which is supplied with oxygen gradually. Compared the measurement results with the numerical simulation results,find that the two match perfectly. The numerical simulation show that there are recirculation areas in furnace, which are not simply plug-flows. The opening of secondary nozzle has great influence on cold flow field of its plane, meanwhile the height of nozzle also affects the distribution of the cold flow field.%采用标准k-ε湍流模型,运用SIMPLE算法对分级供氧气流床气化炉炉内的流场进行了数值模拟,并对实验测量结果与数值模拟结果进行比较,得到两者吻合的结果.通过对模拟结果进行分析,发现炉膛内存在回流区,并不是一个简单的平推流；二次喷嘴的开启对喷嘴所在面的流场有较大影响；同时二次喷嘴的高度对炉内流场分布也有影响.