柱式膜组件曝气过程的气液两相流模拟

发布时间：2018-03-19 08:14

本文选题：柱式膜组件　切入点：计算流体力学　出处：《高校化学工程学报》2017年05期 　论文类型：期刊论文

【摘要】：采用欧拉模型与多孔介质模型对柱式膜组件的曝气过程中气液两相流进行了计算模拟,研究了曝气量、曝气孔数目以及相对位置对膜组件的气液两相分布、流体湍流黏度、液体速度场的影响,模拟数据与实验数据吻合良好。研究结果表明:随着曝气孔数目增加与相对位置均匀排布使得膜组件内气液两相分布更加均匀;湍流黏度随着曝气量增大而增大,当曝气量达到5 m~3×h~(-1)时,湍流黏度不再增加;随着曝气孔数目增加与相对位置的均匀排布使得液体形成较多涡流流动与循环流动。增加曝气孔数目与优化曝气孔相对位置能够有效提高组件内部流场的均匀分布,有利于膜丝的清洗。
[Abstract]:Euler model and porous media model were used to simulate the gas-liquid two-phase flow in the aeration process of the column membrane assembly. The effects of aeration rate, aeration porosity and relative position on the gas-liquid two-phase distribution and turbulent viscosity of the membrane assembly were studied. The simulation data agree well with the experimental data due to the effect of liquid velocity field. The results show that the gas-liquid two-phase distribution is more uniform with the increase of the number of aeration pores and the uniform arrangement of the relative position. The turbulent viscosity increases with the increase of aeration rate. When the aeration rate reaches 5 mm3 脳 ht-1), the turbulent viscosity does not increase. With the increase of the number of aerated pores and the uniform arrangement of the relative position, more swirl flow and circulation flow can be formed, and increasing the number of aerated pores and optimizing the relative position of the aerated pores can effectively improve the uniform distribution of the flow field in the assembly. It is advantageous to the cleaning of the membrane wire.
【作者单位】：南京工业大学化工学院材料化学工程国家重点实验室;
【基金】：国家自然科学基金项目(21576132) 江苏省六大人才高峰计划(2013-XCL-027) 青海省重点实验室(Q-SYS-201516-KF-01)
【分类号】：TQ028.8

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