摘要
采用高速数码相机对毛细管带电射流破碎形态的演化过程进行了可视化研究,探讨了大流量下带电射流破碎的基本形态及射流不稳定破碎模式的转变,分析了物性参数、电压及液体流量对带电射流破碎模式的影响.采用半球形毛细管喷嘴研究锥射流模式向简单射流模式演化的过程,采用普通毛细管喷嘴对比研究去离子水和乙醇的静电简单射流雾化模式.结果表明:在特定电压下,随着流量增加,锥射流模式可以逐渐过渡为简单射流模式;当初始状态为射流时,随着电压增加,大流量下的去离子水静电雾化射流破碎模式主要为曲张不稳定破碎和鞭动不稳定破碎;表面张力较小的无水乙醇更容易产生破碎,还出现了鞭动辅助分叉模式和枝状破碎模式.
The high-speed digital camera was used to visualize the evolution of electrostatic atomization,where the capillary was considered as spraying nozzle.The morphology of electrostatic atomization pattern and the transformation of the instability breakup pattern at high flow rates were investigated,and the effects of physical parameters,applied voltage and liquid flow rate on the instability breakup of electrified jets in electrostatic atomization were explored.The evolution from cone-jet to simple-jet was studied using hemispherical capillary,and simple-jet atomization of deionized water and ethanol was conducted using common capillary.The results indicate that cone-jet mode can be gradually transfered into simple-jet mode with the increasing of flow rate at specific voltage.For the initial state of jetting,with the increasing of external potential,the instability breakup modes of simple-jet for deionized water at high flow rates are mainly varicose instability breakup and kink instability breakup.Anhydrous ethanol with low surface tension is easy to be overcome by electric force and easier to break,and the whipping assisted bifurcation and ramified modes also appear.
作者
王贞涛
陈永钟
孔茜
杨诗琪
岑旗刚
WANG Zhentao;CHEN Yongzhong;KONG Qian;YANG Shiqi;CEN Qigang(School of Energy and Power Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Key Laboratory of Advanced Reactor Engineering and Safety,Ministry of Education,Tsinghua University,Beijing 100084,China)
出处
《江苏大学学报（自然科学版）》
CAS
北大核心
2024年第2期213-219,共7页
Journal of Jiangsu University：Natural Science Edition
基金
江苏省自然科学基金资助项目(BK20171301)
先进反应堆工程与安全教育部重点实验室开放基金资助项目(ARES-2022-05)。
关键词
毛细管喷嘴
静电雾化
简单射流
曲张不稳定破碎
鞭动不稳定破碎
capillary nozzle
electrostatic atomization
simple-jet
varicose instability breakup
kink instability breakup
作者简介
王贞涛(1978-),男,山东齐河人,教授,博士生导师(wickol@hotmail.com),主要从事静电雾化理论及应用的研究;陈永钟(1998-),男,云南昭通人,硕士研究生(chenyongzhong1998@163.com),主要从事静电雾化理论及应用的研究.
