双毛细管静电雾化模式试验  

Experiment on electro-spraying modes with double-capillaries

作　　者：王贞涛 朱忠辉[2] 夏磊 张永辉[2] 李睿[2] WANG Zhentao;ZHU Zhonghui;XIA Lei;ZHANG Yonghui;LI Rui(Postdoctoral Scientific Research Workstation,Jiehua Holdings Co.,Ltd.,Haining,Zhejiang 314419,China;School of Energy and Power Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]洁华控股股份有限公司博士后科研工作站,浙江海宁314419 [2]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2018年第3期284-289,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51106064);江苏省自然科学基金资助项目(BK20171301);江苏大学科技项目青年扶持基金资助项目(FCJJ2015001);江苏省高校优势学科建设工程项目

摘　　要：采用带有显微变焦镜头的高速摄像技术对不锈钢双毛细管产生的静电雾化现象进行了可视化研究.以无水乙醇和去离子水为雾化介质,采用高速相机以104Hz的拍摄频率记录静电雾化图像,通过对大量图像的离线对比分析,获得了双毛细管静电雾化模式,并与单毛细管静电雾化模式进行对比.试验结果表明:在无水乙醇静电雾化中观察到了滴状、斜滴状、纺锤、锥射流、鞭式射流与多股射流等多种雾化模式,而去离子水静电雾化中存在滴状、斜滴状、纺锤、锥射流以及振荡射流等雾化模式;双毛细管静电雾化中,除电压较低的滴状模式外,其余雾化模式中雾化射流中心线与毛细管轴线之间的呈现出不同的夹角,夹角与雾化模式和流量均有关;不同的雾化模式下,雾滴的粒径分布也有显著差别;在相同的试验范围内,无水乙醇和去离子水的表面张力不同,静电雾化模式不同,无水乙醇能够呈现出更多的雾化模式,雾滴粒径更为细小,射流与雾滴的界面更加光滑.Based on microscopic high-speed camera technology,the visualization study of electro-spraying from stainless steel double-capillaries was conducted.Anhydrous ethanol and deionized(DI)water were used as experimental liquids,and the pictures of electro-spraying were captured by microscopy morphology with photographing frequency of 10 4 Hz.The electro-spraying modes for double-capillaries were obtained by off-line analyzing many pictures and compared with typical electro-spraying modes for single capillary.The results indicate that the dripping,skew dripping,spindle,cone-jet,whipping jet and multi-jet modes are observed for anhydrous ethanol,while the dripping,skew dripping,cone-jet and oscillating-jet modes are captured for deionized water.Except the dripping mode,there exists a different angle between the center line of atomization jet and the axis of capillary in the electro-spraying modes due to electrical forces from another capillary.The droplets size has different distributions for different electro-spraying modes.The electro-spraying modes of anhydrous ethanol and DI water are different.For anhydrous ethanol,more electro-spraying modes can be observed,and the surfaces of jets or droplets are much smoother with much smaller droplet size than those for DI water in present experiment parameters due to different surface tensions.

关 键 词：静电雾化 雾化模式 雾滴 双毛细管 显微高速数码相机 

分 类 号：TK018[动力工程及工程热物理]