| D类颗粒节涌流态化的实验和数值模拟 |
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| 引用本文： | 杨富军,王嘉骏,顾雪萍,冯连芳.D类颗粒节涌流态化的实验和数值模拟[J].过程工程学报,2005,5(6):597-600. |
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| 作者姓名： | 杨富军 王嘉骏 顾雪萍 冯连芳 |
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| 作者单位： | 浙江大学化学工程联合国家重点实验室聚合反应工程分室,浙江,杭州,310027 |
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| 基金项目： | 国家自然科学基金资助项目（编号：20490200） |
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| 摘 要： | 应用双流体气固两相流模型，对均一粒径分布的Geldart D类颗粒的节涌流态化过程进行了模拟. 研究了流化过程中流化状态转变、床层膨胀比以及压力脉动功率谱，从Froude准数和颗粒动能的角度分析了模拟结果中的流化特性，并与实验数据进行了对比. 模拟结果准确预测了Geldart D类颗粒的节涌流态化特性，对床层膨胀高度和功率谱的预测与实验基本吻合. Froude准数和颗粒动能随时间的周期性脉动较好地反映了流化床内节涌流态化的气泡行为.
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| 关 键 词： | Geldart D类颗粒 流化床 双流体模型 节涌流态化 |
| 文章编号： | 1009-606X（2005）06-0597-04 |
| 收稿时间： | 2004-09-21 |
| 修稿时间： | 2005-03-14 |
Experiment and Numerical Simulation on Slug Fluidization of Geldart D Particles |
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| YANG Fu-jun,WANG Jia-jun,GU Xue-ping,FENG Lian-fang.Experiment and Numerical Simulation on Slug Fluidization of Geldart D Particles[J].Chinese Journal of Process Engineering,2005,5(6):597-600. |
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| Authors: | YANG Fu-jun WANG Jia-jun GU Xue-ping FENG Lian-fang |
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| Affiliation: | State Key Lab. Chem. Eng., Polymer Reaction Engineering Division, Zhejiang University, Hangzhou, Zhejiang 310027, China |
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| Abstract: | The fluidization of mono-diameter Geldart D particles was experimentally studied and numerically simulated with the two-fluid model based on the granular kinetic theory. The simulation results of voidage distribution show the clear characterization of slug fluidization. The predictions of bed expansion ratio and power spectrum density of pressure fluctuation calculated using FFT method are in agreement with those from experiments. Analysis on Froude number and particle kinetic energy is also carried out. The pseudo-periodicity of Froude number and particle kinetic energy against time reflects exactly the gas-solid heterogeneous flow structure and motion of large gas bubbles in slug fluidized bed. |
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| Keywords: | Geldart D particles fluidized bed two-fluid model slug fluidization |
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