化工学报 ›› 2011, Vol. 62 ›› Issue (5): 1358-1364.

• 表面与界面工程 • 上一篇    下一篇

高压交流电场中单液滴变形度影响因素

杨东海,何利民,叶团结,罗小明   

  1. 1中国石油大学储运与建筑工程学院,山东 青岛 266555;2中国石油北京油气调控中心,北京 100007
  • 出版日期:2011-05-05 发布日期:2011-05-05

Factors influencing single drop deformation in high-voltage AC electric field

YANG Donghai1, HE Limin1, YE Tuanjie2, LUO Xiaoming1   

  • Online:2011-05-05 Published:2011-05-05

摘要:

采用不同的白油和水为实验介质对高压交流电场作用下单液滴的变形特性进行了研究。研究了电场强度、油品黏度、界面张力以及液滴直径等因素对液滴变形度的影响规律,并利用显微高速摄像系统结合图像处理技术对单液滴的变形规律进行了观察和分析。结果表明:液滴变形度主要受电场强度、液滴直径以及界面张力等的影响。与电场强度的N1.7<N<2.4)次幂呈正比;与液滴直径近似呈线性关系;界面张力较低时,液滴更容易变形。油品黏度对液滴变形度没有明显影响。在变形度较小时,离心率和Weissenberg数具有较好的一致性,但We不适用于变形度较大的情况。

关键词: FONT-SIZE: 10.5pt, mso-ascii-font-family: Times New Roman, mso-bidi-font-family: Times New Roman, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-hansi-font-family: Times New Roman">交流电场;液滴;变形度;离心率

Abstract:

Experiments were carried out to investigate the deformation of single drop in high voltage AC electric field with different types of white oil and water.The effects of electric field strength, viscosity of oil, interfacial tension and droplet diameter on the deformation of droplet were studied.With a micro high-speed camera system and image processing technology, the deformation of droplet was observed and analyzed.The results indicate that the deformation is mainly affected by electric field strength, drop diameter and interfacial tension.The eccentricity of ellipsoid drop is approximately proportional to the power of the electric field strength, N(1.7<N<2.4), and the diameter.The drop with lower interfacial tension is more prone to deform in the electric field.The effect of oil viscosity on droplet deformation is not obvious.When the deformation is small, the change of drop eccentricity is accordance with the change of Weissenberg number, but the phenomenon is different when the deformation is large.

Key words: FONT-SIZE: 10.5pt, mso-ascii-font-family: Times New Roman, mso-bidi-font-family: Times New Roman, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-hansi-font-family: Times New Roman">交流电场;液滴;变形度;离心率