流体机械微气泡发生器的结构优化研究  

Structural Optimization Study of Microbubble Generator

作　　者：郭旭[1] 李强[1] 张健[1] 雷毛 刘佳琳 朱浩玮 GUO Xu;LI Qiang;ZHANG Jian;LEI Mao;LIU Jialin;ZHU Haowei(New Energy College of China University of Petroleum(East China),Qingda2o66580,China)

机构地区：[1]中国石油大学(华东)新能源学院,青岛266580

出　　处：《工程热物理学报》2023年第7期1815-1822,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.52176050);山东省自然科学基金资助项目(No.ZR2020ME174)。

摘　　要：本文基于CFD技术对文丘里式微气泡发生器进行了研究,分析了微气泡发生器内流动特性及微气泡在管内扩散段的发展过程,得出气泡在湍流剪切作用下逐渐破碎。同时,分析了喉部、渐扩角对气泡发生器发泡性能的影响规律,通过实验对模拟结果进行了验证。结果表明:随着喉部内径的增大,气泡粒径呈逐渐增大趋势,入口压力也逐渐增大;随着扩张角的增大,气泡粒径呈先减小后增大的趋势;改变喉部结构形式,当采用阶梯喉部结构时,气泡粒径更小。In this paper,we studied the venturi type microbubble generator based on CFD technology,analyzed the fow characteristics inside the microbubble generator and the development process of microbubbles in the diffusion section of the tube,and concluded that the bubbles are gradually broken under the effect of turbulent shear.At the same time,the infuence law of the throat and tapering angle on the foaming performance of the bubble generator was analyzed,and the simulation results were verified by experiments.The results show that:with the increase of the inner diameter of the throat,the bubble particle size tends to increase gradually,and the inlet pressure also increases gradually;with the increase of the expansion angle,the bubble particle size tends to decrease first and then increase;when the throat structure is changed,the bubble particle size is smaller when the stepped throat structure is used.

关 键 词：气泡发生器 湍流剪切 发泡性能 结构优化 

分 类 号：TQ021.1[化学工程]