旋流泡罩流体力学性能研究  

Study on the Hydrodynamic Performance of Swirl Bubble-Cap

作　　者：袁惠新[1,2] 莫倪旭 付双成[1,2] 周发戚 王伟鹏 YUAN Huixin;MO Nixu;FU Shuangcheng;ZHOU Faqi;WANG Weipeng(School of Mechanical Engineering and Rail Transit,Changzhou University,Changzhou 213164,China;Jiangsu Key Laboratory of Green Process Equipment,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学机械与轨道交通学院,江苏常州213164 [2]江苏省绿色过程装备重点实验室(常州大学),江苏常州213164

出　　处：《常州大学学报（自然科学版）》2022年第5期57-64,共8页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21676031);江苏省高校自然科学研究资助项目(19KJB530003)。

摘　　要：传统塔设备存在雾沫夹带甚至液泛,为此提出了旋流泡罩,其基于旋流聚结和离心沉降原理减小雾沫夹带。利用CFD数值模拟探究旋流泡罩的流体力学性能,包括压力降和相分离性能。采用出、入口平均粒度之比的聚结效果来评估相分离性能。首先用压力降试验数据来验证模拟的可靠性,用RNG k-ε模型来处理湍流,用双欧拉模型来处理气液两相流,并用PBM模型考虑液滴的聚结破碎,来探究旋流泡罩进气量对压力降的影响,进气量、进气中液滴体积分数和粒度对聚结效果的影响。结果显示,随进气量的增加,旋流泡罩压力降增加;在研究范围内,聚结效果随进气量的增大而增加,而后趋于平缓;聚结效果随进气中液滴体积分数的增加而提高,随进气中液滴粒度的减小而提高。The mist entrainment even flooding would unavoidably occur in traditional towers.Therefore,swirl bubble-cap is proposed,which would be expected to reduce the mist entrainment based on the principle of swirl coalescence and centrifugal sedimentation.In this paper,CFD numerical simulation is used to explore the hydrodynamic performance of swirl bubble-cap,including pressure drop and phase separation performance.The coalescence effect of the ratio of the average particle size at the outlet to the inlet is used to evaluate the phase separation performance.Firstly,the reliability of the simulation was verified with the pressure drop data tested.The RNG k-ε model was used to deal with turbulence,the Euler-Euler model to deal with gas-liquid two-phase flow,the PBM model to consider the coalescence and breakage of droplets.Results showed that the pressure drop increased with the increase in feed flowrate,the coalescence effect increased with the increase in feed flowrate and then leveled off with further increase in feed flowrate,increased with the increase in droplet concentration and decreased with the increase in droplet size.

关 键 词：旋流泡罩 流体力学性能 压降 聚结效果 

分 类 号：TQ028[化学工程]