| 基于CFD的恒通量陶瓷膜厚度设计 |
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| 引用本文： | 邹琳玲,漆虹,邢卫红.基于CFD的恒通量陶瓷膜厚度设计[J].化工学报,2010,61(10):2615-2619. |
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| 作者姓名： | 邹琳玲 漆虹 邢卫红 |
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| 作者单位： | 南京工业大学化学化工学院, 材料化学工程国家重点实验室 |
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| 基金项目： | 教育部新世纪优秀人才支持计划项目，江苏省高校科研成果产业化推进项目，江苏省"六大"人才高峰项目 |
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| 摘 要： | 膜厚度对膜渗透性能有着显著影响。本文结合Navier-Stokes公式和Darcy定律对恒通量膜的膜厚度沿程分布进行了模拟计算。膜通道内的主体流动采用Navier-Stokes公式来描述，多孔介质内的流动采用Darcy定律来描述，多孔介质比阻采用Konzey-Carmen方程来计算。结果表明，膜厚度的沿程分布趋近于线性分布，并随操作压力、错流速率、操作温度的变化而变化。错流速率对膜厚度分布的影响尤为显著，而压力和温度的影响较小。在不同的错流速率下，要实现恒通量操作，必须有合适的膜厚沿程分布的膜。本计算结果为恒通量膜的制备、应用提供了依据。
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| 关 键 词： | 恒通量膜 计算流体力学 膜厚度 |
Membrane thickness gradient of isoflux ceramic membrane based on CFD |
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| ZOU Linling,QI Hong,XING Weihong.Membrane thickness gradient of isoflux ceramic membrane based on CFD[J].Journal of Chemical Industry and Engineering(China),2010,61(10):2615-2619. |
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| Authors: | ZOU Linling QI Hong XING Weihong |
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| Abstract: | Membrane thickness has significant effect on permeability of membrane.In this work the membrane thickness gradient of isoflux ceramic membrane was calculated with the Navier-Stokes and Darcy equations,which governed the bulk flow and the flow through the membrane, respectively.The specific resistance of porous medium was calculated by Konzey-Carmen equation.The results showed that the membrane thickness was approximately linear to the distance in axial direction.The cross-flow velocity had a significant influence on the membrane thickness gradient along the axial direction, so it is necessary to choose different membrane thickness gradient along the axial direction to obtain uniform trans-membrane pressure at different cross-flow velocity.The effects of pressure and temperature were relatively insignificant.The result of this study may provide guidance on membrane preparation and application. |
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