非均匀交变电场下液滴破碎与分散行为实验研究  

Experimental Study on Droplet Fragmentation and Dispersion Under Heterogeneous Alternating Electric Field

作　　者：王道睿 王军锋[1] 王东保 吴天一 李步发 WANG Daorui;WANG Junfeng;WANG Dongbao;WU Tianyi;LI Bufa(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源与动力工程学院,镇江212013

出　　处：《工程热物理学报》2024年第7期1994-2000,共7页Journal of Engineering Thermophysics

基　　金：江苏省科技创新支撑计划——“一带一路”创新合作项目(No.BZ2022016);常州国际合作项目(No.CZ2022004)。

摘　　要：本文基于显微高速摄像技术以及PIV技术实验研究了非均匀交变电场下液滴在不相溶介电液体中的变形、破碎和分散等复杂电流体动力学行为,精确捕捉了不同电场条件下荷电液滴动态行为过程的显微形貌特征以及流动特性,获得了荷电液滴特殊破碎形态,发现了液滴破碎过程中微尺度液滴的形成途径,归纳得到了莲状、冠状两种液滴破碎模式,分析了电参数对不相溶液-液多相分散过程的影响规律。In this study,the complex electrohydrodynamic behaviors of droplets in immiscible dielectric liquids under non-uniform alternating electric fields was studied based on experimental research using high-speed microscopy and PIV techniques.The microscopic morphological features and flow characteristics of charged droplets under different electric field conditions were captured accurately,and the special fragmentation patterns of charged droplets were obtained.The formation pathways of microscale droplets during the droplet fragmentation process are discovered,and two types of droplet fragmentation modes are summarized:lotus-shaped and crown-shaped.The impact of electrical parameters on the dispersion process of immiscible liquid-liquid multiphase systems was analyzed.

关 键 词：电流体动力学(EHD) 荷电液滴 非均匀电场 液-液分散 

分 类 号：TK175[动力工程及工程热物理—热能工程]