2020年 04期

摘要(Abstract)：

采用计算颗粒流体力学(CPFD)的数值模拟方法,对直径为160 mm、高度为273 3 mm的变径流化床反应器内的气固流动特性进行冷态模拟,研究不同气速及不同初始物料量对流化床反应器气固流动特性的影响,得到流化床内颗粒体积分数、颗粒速度以及颗粒停留时间的分布。结果表明,当气速不小于2.5 m/s时,流化床内颗粒体积分数轴向分布更为均匀,颗粒速度呈中间高、两边低的倒"U"形分布;壁面附近的颗粒停留时间长于中心处,使得壁面附近的颗粒趋于聚集;流化床的轴径向颗粒体积分数随着初始物料量的增加而增大。

关键词(KeyWords)： 流化床;气-固两相流;流动特性;数值模拟

基金项目(Foundation): 国家自然科学基金项目(21766034);; 新疆维吾尔自治区自然科学基金项目(2016D01C035)

作者(Author): 陈艳,张亚新

DOI: 10.13349/j.cnki.jdxbn.2020.04.011

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