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.