医用压缩雾化器结构优化与雾化效果数值模拟  

Structural Optimization of Medical Compression Nebulizer and Numerical Simulation of Atomization Effect

作　　者：卢涛[1] 柯顺利 朱明宽 徐坤 LU Tao;KE Shun-li;ZHU Ming-kuan;XU Kun(College of Electrical Engineering,Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]河南工业大学电气工程学院,郑州450001

出　　处：《科学技术与工程》2023年第31期13367-13374,共8页Science Technology and Engineering

基　　金：河南省科技攻关项目(212102110205)。

摘　　要：医用压缩雾化器结构对呼吸系统疾病的雾化吸入治疗起决定作用。通过流体体积法-离散颗粒法(volume of fluid-discrete particle model,VOF-DPM)的方法,研究了医用压缩雾化器喷嘴结构、气体流速和液体通道宽度等对雾化效果的影响。结果表明,压缩雾化后液滴的动能和5μm以下的液滴粒径占比与气体流速成正比;随着液体通道宽度的增加,雾化后液滴的动能会增加,但是5μm以下的液滴粒径占比会相对减小;使用锥型破碎挡板结构,不仅能提升雾化后液滴的动能,而且能够使5μm以下的液滴粒径占比相比原来提升5%~7%。通过改变药液破碎挡板的形状,使得药液雾化后液滴直径在5μm以下的占比、药液雾化后液滴动能都有所增加,提升了雾化器的雾化效果。这些分析结果对后续医用压缩雾化器的性能表征和结构优化设计具有指导意义。The structure of medical compression nebulizer plays a decisive role in the atomized inhalation treatment of respiratory diseases.The effects of the nozzle structure,gas flow rate and liquid channel width of the medical compression nebulizer on the atomization effect were studied by the volume of fluid-discrete particle model(VOF-DPM).The results show that the kinetic energy of the droplets after compression atomization and the proportion of droplet size below 5μm are proportional to the gas flow rate.With the increase of the width of the liquid channel,the kinetic energy of the droplets will increase after atomization,but the proportion of droplet size below 5μm will be relatively reduced.The use of conical crushing baffle structure can not only improve the kinetic energy of the droplets after atomization,but also increase the proportion of droplet size below 5μm by about 5%~7%compared with the original.By changing the shape of the chemical solution crushing baffle,the proportion of droplet diameter below 5μm,and the kinetic energy of the droplet after atomization of the chemical solution are increased,which improves the atomization effect of the atomizer.These analysis results have guiding significance for the performance characterization and structural optimization design of subsequent medical compression nebulizers.

关 键 词：压缩雾化 结构优化 液滴直径 粒径分布 VOF-DPM 

分 类 号：TH138[机械工程—机械制造及自动化]