化工学报2017，Vol.68Issue(10)：3725-3732,8.DOI:10.11949/j.issn.0438-1157.20170394
CFB密相区大颗粒横向扩散系数的CPFD模拟
Lateral dispersion coefficient of large solid particles in CFB dense zone using CPFD method
摘要
Abstract
Computational particle fluid dynamics (CPFD), a discrete element method (DEM), was utilized to simulate the lateral diffusion behavior of large solid particles in a 900 mm×100 mm×1200 mm quasi-three dimensional fluidized-bed. Before the simulating, verification had been performed in accordance with previous experimental studies to ensure the reliability of CPFD. The effects of the tracer particle diameter and the fluidizing air velocity on lateral dispersion coefficient of large solid particles in dense zone were investigated by the method of tracer particle. The results showed that the bubble behavior was the major factor of solid mixing in dense zone, which had been confirmed in many literatures. An increased gas velocity or a reduced tracer particle diameter resulted in an increased lateral dispersion coefficient.关键词
流化床/密相区/CPFD/气泡/扩散/流化风速Key words
fluidized-bed/dense zone/CPFD/bubble/diffusion/fluidization air velocity分类
能源科技引用本文复制引用
张贤,葛荣存,张守玉,刘青,张缦,杨海瑞,吕俊复..CFB密相区大颗粒横向扩散系数的CPFD模拟[J].化工学报,2017,68(10):3725-3732,8.基金项目
国家重点研发计划项目(2016YFB0600201). Foundation item:supported by the National Key Research and Development Program (2016YFB0600201). （2016YFB0600201）
