基于欧拉-欧拉模型的气固鼓泡床数值模拟研究  

STUDY ON NUMERICAL SIMULATION OF GAS-SOLID FLOWIN BUBBLING BED BASED ON EULERIAN-EULERIAN MODEL

作　　者：曹玉春[1] 吴金星[1] 李言钦[1] 魏新利[1] 

机构地区：[1]郑州大学节能技术研究中心,河南郑州450001

出　　处：《热力发电》2008年第11期35-38,共4页Thermal Power Generation

基　　金：河南省教育厅自然科学研究项目(编号2007480006);郑州大学引进人才项目资助

摘　　要：通过基于颗粒动力学的双流体模型对气固流化床进行了数值模拟,分析考察了不同曳力模型、颗粒弹性恢复系数及计算时间步长等对床内混合及气泡的影响。数值计算结果表明:采用不同气固曳力模型会得到不同的气泡直径大小;对于同一曳力模型,随着颗粒弹性恢复系数的增加,床内流态化程度会加剧,计算时间步长增加,计算所得床内气泡直径略有减小。The numerical simulation of gas - solid flow in fluidized bed has been carried out through double fluid model based on granular dynamics, the influence of different drag force model, restitution coefficient of granular elasticity, and step length of calculated time ete upon mixing and bubbles appeared in the bed being analysed and investigated. Results of numerical calculation show that the different bubble diameter size can be obtained by using different drag force model; by using same drag force model, the fluidization level in the bed may be improved along with increase of the restinution coefficient of granular elasticity;the increase of step length in calculated time can sligbtly decrease the diameter of buhhles in the bed obtained from calculation.

关 键 词：气固多相流 鼓泡流化床 欧拉-欧拉模型 颗粒动力学 颗粒弹性恢复系数 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]