大颗粒流化床内压力波动现象的仿真研究  

Simulation of pressure fluctuation in a gas-solid coarse particle fluidized bed

作　　者：佟桂芳[1] 徐德龙[1] 

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055

出　　处：《西安科技学院学报》2002年第3期259-263,共5页

基　　金：国家九.五科技攻关项目 (97-5 9-0 4);陕西省自然科学研究计划项目 (2 0 0 1c2 7)

摘　　要：应用离散颗粒模型对大颗粒气固两相流化床系统进行了仿真研究 ,在完全流态化条件下对压力波动现象进行数值模拟。结果表明 ,压力波动的范围和频率与流化床内两相运动状态密切相关。随着床内颗粒相湍动的加剧 ,压力波动不断加剧 ,床内压降随表观气流速度的增加略有减少。The pressure fluctuation at fully fluidization state in a gas solid coarse particle fluidized bed was simulated using the discrete particle method. It was found that the pressure fluctuation was closely related to the gas solid two phases flow. As the superficial gas velocity increasing, the pressure fluctuation was intensified and the pressure drop slightly decreased. The simulation of pressure fluctuation in a gas solid coarse particle fluidized bed will give the basic understanding for stable operation of fluidized bed.

关 键 词：大颗粒流化床 数值仿真 压力波动 压降 离散颗粒模型 数值模拟 表观气流速度 

分 类 号：TQ051.13[化学工程] TQ018