摘要
为探讨荷电液滴的变形机理,对滴状模式下荷电液滴的脉动变形特征进行了实验研究。综合考虑毛细管经、荷电电压及液滴的物性参数,采用带有显微变焦镜头的高速数码相机对荷电液滴进行了微距拍摄,并结合图像处理技术研究了荷电液滴的脉动变形问题。实验结果表明:随着电压的增加,液滴的最大变形率逐渐增大,但其脉动变形周期却逐步减小。对于导电性液体,电导率对荷电液滴的变形率及脉动周期影响微弱。表面张力与荷电液滴的最大变形率呈反比,与其脉动变形周期呈正比。
This study concerns the effects of drop properties,capillary diameter and applied voltage on drop deformation and oscillation in the dripping mode.A high-speed camera combined with a microscopic zoom lens has been used to take images of the deformed shape of charged droplet,and the droplet deformation rate which was calculated by the image processing technology was used to analyze the effects of some parameters on droplet oscillation and deformation.The results show that the mediums with different conductivities will tend to have little effect on droplet oscillation cycle and deformation rate for the conductive liquids.Bigger surface tension turns out to be lower deformation rate but bigger oscillation cycle.Higher applied voltage implies larger deformation rate but smaller oscillation cycle.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2013年第1期99-102,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51006047
No.51106064)
关键词
荷电液滴
物性参数
变形率
高速数码
charged droplet
physical parameters
deformation rate
high-speed camera
