| 气固流化床中气泡流运动特征和空隙率径向分布 |
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| 引用本文： | 郝晓刚,石炎福,余华瑞.气固流化床中气泡流运动特征和空隙率径向分布[J].化工学报,1998(3). |
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| 作者姓名： | 郝晓刚 石炎福 余华瑞 |
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| 作者单位： | 太原工业大学化工系!四川联合大学化学工程系成都610065(郝晓刚)，四川联合大学化学工程系!成都610065(石炎福，余华瑞) |
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| 基金项目： | 国家自然科学基金!29476226 |
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| 摘 要： | 引言流态化技术在工业领域应用越来越广，但由于流态化行为复杂，许多内在规律还有待于进一步揭示．气固流化床中最基本的特征是颗粒聚集的乳化相与气体聚集的气泡相共存，它的复杂性就在于它的不均匀性和多态性．气固流化床中的不均匀性是由空隙率分布来描述的，然而空隙率的分布目前还未能从理论上得到定量的描述．气固流化床内的空隙率分布与气泡的运动密切相关，因此对床层空隙率的了解最终决定于对流化床气泡运动的研究．在此作者采用流体力学的方法从宏尺度和宇尺度范围来探讨气固流化床内气泡的运动规律，建立相应的多尺度、连续介质…
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| 关 键 词： | 流化床 气泡流 空隙率 多尺度 |
FLOW BEHAVIOR OF BUBBLE AND RADIAL POROSITY DISTRIBUTION IN GAS/SOLID FLUIDIZED BEDS |
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| Hao Xiaogang,Shi Yanfu,Yu Huarui.FLOW BEHAVIOR OF BUBBLE AND RADIAL POROSITY DISTRIBUTION IN GAS/SOLID FLUIDIZED BEDS[J].Journal of Chemical Industry and Engineering(China),1998(3). |
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| Authors: | Hao Xiaogang Shi Yanfu Yu Huarui |
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| Abstract: | The flow behavior of the bubble in gas/solid fluidized bed is studied in multi-scales.A hypotheses of taking dispersed bubble as the continuous medium and the hydromechanics expression based on volume flux are proposed.The mathematical model of radial porosity distribution in the dense zone is developed.The radial distribution of the porosity is parabolic in nature according to the theoretical calculation and the calculated data is consistent with experimental data satisfactorily. |
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| Keywords: | fluidized bed bubble-fluid porosity multi-scaleconcentration near interface |
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