离子风作用下液滴的振荡蒸发特性  

Oscillating evaporation characteristics of droplets under action of ion wind

作　　者：王军锋[1] 赵天岳 田加猛 许浩洁 左磊 WANG Junfeng;ZHAO Tianyue;TIAN Jiameng;XU Haojie;ZUO Lei(School of Energy and Power Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]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）》2024年第2期206-212,228,共8页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51976084,52106201)。

摘　　要：设计搭建了离子风作用下液滴蒸发试验装置,研究了不同电场和环境气体中去离子水液滴的蒸发速率、振幅和振荡频率等动态蒸发行为参数,并测量了离子风的流场速度分布.结果表明:当电压低于起晕电压时,电场力会降低液滴蒸发速率;当电压高于起晕电压时,离子风的形成会强化液滴蒸发;电压和气体离子迁移率的增加均会提高离子风的风速,加剧液滴振荡,提高液滴蒸发速率;相比液滴自然蒸发,离子风作用下液滴蒸发速率的最大增强比可达9.89;随着电压增大,离子风从不稳定状态转变为稳定状态.An experimental device for testing droplet evaporation under the action of ionic wind was designed.The dynamic evaporation behaviors of evaporation rate,oscillation amplitude and oscillation frequency of deionized water droplet under different electric fields and ambient gases were investigated,and the velocity distribution of ion wind field was also measured.The results show that when the voltage is lower than the corona voltage,the electric field force can reduce the droplet evaporation rate.When the voltage is higher than the corona voltage,the formation of ion wind can strengthen the droplet evaporation.Both of the increases in voltage and gas ions mobility can augment the ionic wind speed,which intensifies the droplet oscillation and increases the droplet evaporation rate.Compared with the natural evaporation of droplet,the maximum enhancement ratio of droplet evaporation rate under the action of ion wind can reach 9.89.With the increasing of voltage,the ion wind changes from the unstable status to the stable status.

关 键 词：液滴 非均匀电场 蒸发特性 振荡特性 电晕离子风 环境气体 

分 类 号：TK124[动力工程及工程热物理—工程热物理]