交流电场下超疏水涂层表面液滴运动特性的体积效应研究  

Study on Volume Effect of Droplet Motion Characteristics on Superhydrophobic Coating Surface Under AC Electric Field

作　　者：吴田 种沛 冯平辉 方春华[1,2] 黎鹏 普子恒[1,2] WU Tian;CHONG Pei;FENG Pinghui;FANG Chunhua;LI Peng;PU Ziheng(Hubei Provincial Engineering Technology Research Center for Power Transmission Line,China Three Gorges University,Hubei Yichang 443002,China;College of Electrical Engineering&New Energy,China Three Gorges University,Hubei Yichang 443002,China;State Grid Zhejiang Huzhou County Power Supply Co.,Ltd.,Zhejiang Huzhou 313000,China)

机构地区：[1]三峡大学湖北省输电线路工程技术研究中心,湖北宜昌443002 [2]三峡大学电气与新能源学院,湖北宜昌443002 [3]国家电网浙江省湖州供电有限公司,浙江湖州313000

出　　处：《高压电器》2023年第9期142-149,共8页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(51807110)。

摘　　要：交流电场下超疏水涂层表面液滴的滑动和凝并特性对其污闪特性具有重要影响,为了表征超疏水涂层表面液滴的运动特性,以环氧树脂板为基底利用喷涂法制备了超疏水涂层,测量了均匀电场下超疏水涂层表面不同体积液滴的临界运动场强,并利用基于图像的目标跟踪方法绘制了不同体积液滴的运动轨迹;最后通过仿真计算和理论推导,分析了交流电场下液滴运动机理以及体积对液滴临界运动场强和运动速度的影响。结果表明:液滴体积对其临界运动场强的表现出明显的“体积效应”,0~100μL液滴的临界运动场强在体积为40μL出现一极小值;液滴体积对其临界运动场强影响主要与电晕起始场强和电荷积累量有关;而液滴平均运动速度与体积呈负相关,100μL液滴的平均运动速度较10μL减小了66.7%。The sliding and coagulation characteristics of droplets on the superhydrophobic coating surface under AC electric field have an important influence on its contamination flash-over characteristics.In order to characterize the motion characteristics of droplets on the surface of superhydrophobic coating,the superhydrophobic coating was prepared with the epoxy resin plate as the base and by the use of spraying method.The critical motion field strength of droplets with different volumes on the surface of superhydrophobic coating was measured under uniform electric field.The motion trajectories of droplets with different volume of droplets were drawn by image-based target tracking algorithm.Finally,the mechanism of droplet motion under AC electric field and the influence of volume on the critical motion field strength and velocity of droplet were analyzed through simulation calculation and theoretical derivation.The results show that the droplet volume has a significant’volume effect’on its critical motion field strength,and the critical motion field strength of 0~100μL droplets has a minimum value at a volume of 40μL.The influence of droplet volume on its critical motion field strength is mainly related to the initial corona field strength and charge accumulation.The average velocity of droplets is negatively correlated with the volume,and the average velocity of 100μL droplets is 66.7%lower than that of 10μL droplets.

关 键 词：超疏水涂层 电场力 临界运动场强 体积效应 运动轨迹 运动速度 

分 类 号：TM643[电气工程—电力系统及自动化]