文档介绍：四喷嘴对置式气化炉的冷态数值模拟
[周俊杰,房全国,郭朋飞,严伊莉]
[郑州大学,450001]
[ 摘要] 本文利用 fluent 软件对四喷嘴对置式气化炉进行了冷态数值模拟,湍流模型选择 Realizable k-e
model,颗粒相采用 DPM 模型,模拟得到气化炉内流场分布情况及颗粒停留时间的分布情况,
模拟结果与实验结果相一致。结果表明:流体撞击后,向下流动的流体有部分未经回流区很快
流出气化炉,不利于物料的充分反应;炉内撞击区及射流区的湍动能较大,此处混合效果较好,
湍动能最大值为 237m2/s2,其他区域湍动能较小,低于 10m2/s2,此区域的混合效果较差;颗
粒停留时间的分布较宽,从变化到 ,有 65%的颗粒停留时间小于平均值 ,
四喷嘴对置式气化炉内颗粒停留时间的分布有待改善。
[ 关键词] 气化炉;冷态模拟;DPM 模型;停留时间
Cold-Model Numerical Simulation of Opposed
Tetra-Burner Gasifier
[ZHOU Jun-jie, FANG Quan-guo, GUO Peng-fei, Yan Yi-li]
[Zhengzhou University, 450001]
[ Abstract ] This paper uses Fluent software to simulate the tetra-burner gasifier, chooses Realizable k-e
model, DPM model is used to simulate the particle phase, flow field and the distribution of
particle residence time are obtained, simulation result is consistent with the experimental
result. The results show that after impinging some fluid flows out quickly without passing the
recirculation zone, which is not conducive to the material full reaction; Turbulent ic
energy of the impinging zone and the jet zone is larger, mixing effect is better, maximum
turbulent ic energy is 237m2/s2. Turbulent ic energy of other areas is smaller, less
than 10 m2/s2, mixing effect is poorer. Distribution of particle residence time is wide, from
to , 65% of the particle residence