刘春江 ^{1, 2}，卜孟庄 ¹ ，郭 凯 ¹ ，郑龙云 ¹ ，项文雨 ¹ ，刘 辉 ¹

AuthorsHTML:刘春江 ^{1, 2}，卜孟庄 ¹ ，郭 凯 ¹ ，郑龙云 ¹ ，项文雨 ¹ ，刘 辉 ¹

AuthorsListE:Liu Chunjiang^{1, 2}，Bu Mengzhuang¹，Guo Kai¹，Zheng Longyun¹，Xiang Wenyu¹，Liu Hui¹
AuthorsHTMLE:Liu Chunjiang^{1, 2}，Bu Mengzhuang¹，Guo Kai¹，Zheng Longyun¹，Xiang Wenyu¹，Liu Hui¹
Unit:1. 天津大学化工学院，天津 300072；
2. 化学工程联合国家重点实验室(天津大学)，天津 300072
Unit_EngLish:1. School of Chemical Engineering and Technology，Tianjin University，Tianjin 300072，China；
2. State Key Laboratory of Chemical Engineering(Tianjin University)，Tianjin 300072，China
Abstract_Chinese:Winpak是一种新型的规整填料．为了探讨其在液液单相混合过程中的应用前景，采用实验与计算流体力学(CFD)方法，对Winpak 填料混合性能及其混合强化机制进行了研究．本文设计了包含压降测量以及取样分析的液液单相混合实验装置对Winpak填料混合性能进行测试．通过Standard k-ω湍流模型，建立了液液单相混合过程的CFD模型，并与实验测量结果进行对比，模拟值与实验值达到较好的吻合效果，证明了CFD模型的准确性．随后，通过CFD方法考察了压降以及变异系数(coefficient of variation，CoV)随流量变化的情况．当液体总流量由1.35m3/h提高到3.02m3/h时，Winpak填料的压降提高了227.1%，同时CoV值下降了2.8%．CFD计算结果表明随着混合过程压降的提高，混合性能也有相应的提高．Winpak填料内部速度场与浓度场的模拟结果表明，CoV值沿流动方向逐渐下降，而CoV值急剧下降的位置均处于Winpak填料的开窗结构处．对比Winpak填料与板波纹填料的模拟结果，Winpak填料压降平均提高了15.0%，但同时CoV值平均降低了24.1%．对比两种填料同一截面处的径向速度分布模拟结果可以看出，Winpak填料的开窗结构可以在更大的流动区域内产生有利于混合的径向速度，达到强化混合的效果．从而证明了Winpak填料对液液单相混合过程具有促进作用，而Winpak填料的开窗结构是其具有较高混合性能的主要原因．
Abstract_English:Winpak is a novel structured packing technology. To investigate its application prospects with respect to liquid-liquid single-phase mixing，we used experimentation and computational fluid dynamics(CFD)analysis to study Winpak’s mixing performance and its mechanism of mixing enhancement. To test the mixing performance of Winpak，the experimental setup was designed to measure the pressure drop and concentration. Using the Standard k-ω turbulence model，we built a CFD model of the single-phase mixing process. The accuracy of the CFD model was determined by comparing the simulation and experimental results，which were found to agree well. Then，using CFD，we investigated the mixing performance based on the pressure drop and coefficient of variation at different flow rates. The results indicate that when the flow rate is increased from 1.35 m3/h to 3.02 m3/h，the pressure drop of the Winpak increases by 227.1%，and correspondingly the CoV value decreases by 2.8%. It was obvious that the pressure drop increased with improvements in the mixing performance. The simulation results of the velocity and concentration fields in Winpak revealed that the CoV value decreases gradually along the direction of flow. A sharp decrease in the CoV value was found to occur in the window structure of Winpak. Comparing the simulation results of packing with a corrugated structure，the simulated pressure drop of Winpak packing increased by 15.0% on average，and its CoV value decreased by 24.1% on average. A comparison of the simulated radial velocity contours of these two kinds of packing along the same cross section indicates that the window arrangement in the Winpak packing sheet generates radial flow over a larger region that is very beneficial to the mixing process. The above results demonstrate that Winpak can promote liquid-liquid single-phase mixing，with its window structure being the main reason for its excellent mixing performance.
Keyword_Chinese:规整填料；Winpak 填料；混合性能；计算流体力学
Keywords_English:structured packing；Winpak packing；mixing performance；computational fluid dynamics

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