摘要
为丰富细微颗粒物的收集手段,通过分析水雾凝聚的机理,发现在超声驻波场中微粒之间存在的流体力学和同向凝聚作用更有利于凝聚.为验证流体力学中超声驻波场对液体微粒具有更好的凝聚效果,初步搭建了水雾凝聚试验台,并开展了试验研究,试验采用无声场、普通声场及驻波场3种声场进行测试.选取凝聚管道的5个关键位置进行测量并开展了25组试验,主要测量了微粒粒径均值分布情况与微粒的数量.结果表明,驻波场的凝聚效率最高,普通声场次之,无声场时基本没有凝聚现象的产生.测试结果有助于研究超声凝聚对细微颗粒物的去除方式.
To enrich the approaches of collecting fine particles,this work analyzed the coalescence mechanism of water mist,and establishing the conducive to the coagulation of the hydrodynamics and isotropic coalescence between particles in the ultrasonic standing wave field.Initially a water mist coalescence test bench was set up and brought into operation.There were three kinds of sound fields applied to experiment,which refer to the no sound field,normal sound field and standing wave field.Then researchers can verify that ultrasonic standing wave field has better coalescence effect on liquid particles in fluid mechanics.Experiments were conducted in 25 Twenty-five key locations in the coalescence pipeline,mainly measuring the mean particle size distribution and the number of particles.Results illustrated the coalescence efficiency of the standing wave field was the highest,followed by the normal acoustic field.Basically,there was no coalescence in silent field.This work will contribute to the study of the removal mode of fine particles by ultrasonic coagulation.
作者
张勤俭
李海洋
张武
俞径舟
严鲁涛
张向燕
ZHANG Qinjian;LI Haiyang;ZHANG Wu;YU Jingzhou;YAN Lutao;ZHANG Xiangyan(School of Electromechanical Engineering,Beijing Information Science and Technology University,Beijing 100192,China;School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China;School of Automation,Beijing University of Posts and Telecommunications,Beijing 100876,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2022年第5期1321-1330,共10页
Journal of Basic Science and Engineering
基金
国家重点研发计划项目(2019YFC0119200)
关键词
超声凝聚
凝聚试验
驻波声场
效率检测
图像处理
数据分析
ultrasonic coagulation
coagulation experiment
standing wave sound field
efficiency detection
image processing
data analysis
