| 增压导向式喷动流化床流动特性的数值模拟 |
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| 引用本文： | 肖睿,章名耀,金保升.增压导向式喷动流化床流动特性的数值模拟[J].燃烧科学与技术,2001,7(3):262-266. |
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| 作者姓名： | 肖睿 章名耀 金保升 |
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| 作者单位： | 东南大学洁净煤发电及燃烧技术教育部重点实验室 |
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| 基金项目： | 国家"973”煤转化过程概念验证及过程的优化集成项目子课题;东南大学科学基金资助项目. |
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| 摘 要： | 采用双流体模型对增压导向式喷动流化床内喷动区和环形区气固运动速度和空隙率进行数值模拟。计算结果表明,喷动区颗粒速率在初始阶段急剧上升而气体速度则急剧下降,进入导向管后趋于平缓,而且颗粒加速程度不写系统压力有关,还形区气体速度在卷吸段增大,进入隔离流区后保持不变,而颗粒下降速度一直保持不变,喷动区的空隙率在卷吸段下降,进入导向管后又开始上升。
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| 关 键 词： | 喷动流化床锅炉 导向管 数值模拟 流动特性 |
| 文章编号： | 1006-8740(2001)03-0262-05 |
| 修稿时间： | 1999年9月24日 |
Numerical Simulation of Hydrodynamics in Pressurized Spout-fluid Bed with a Draft-tube |
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| XIAO Rui,ZHANG Ming yao,JIN Bao sheng.Numerical Simulation of Hydrodynamics in Pressurized Spout-fluid Bed with a Draft-tube[J].Journal of Combustion Science and Technology,2001,7(3):262-266. |
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| Authors: | XIAO Rui ZHANG Ming yao JIN Bao sheng |
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| Abstract: | A new multiflow model of a pressurized spout fluid bed with a draft tube has been developed to investigate the voidage and the velocities of particle and gas in spout and annular region.The results indicated that the spout particle velocities increase and the gas velocities decrease dramatically at the initial length,after entering draft tube,the two velocities slow down.In addition,the pressure affects the acceleration of particle.The annular gas velocities grow in entrainment region and keep constant in separate region,while the annular particle velocities are constant.The spout voidage decreases in entrainment region and increases in draft tube. |
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| Keywords: | spout fluid bed draft tube pressure numerical simulation |
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