Experimental study on electro-spraying modes from multi-capillary
WANG Zhentao
XIA Lei
ZHANG Yonghui
QIAN Yisong
GU Liding
QIU Qiansheng
Abstract：High speed digital camera was used to record eletrohydrodynamics spraying modes of multi-capillary with ethanol.The spraying modes of multi-capillary were obtained by analyzing the pictures,and the effect of operating parameters on electro-spraying modes was discussed.The spraying modes with two configurations were classified by the dimensionless parameter flow (α) and electric Bond number (β).The experimental results indicated that similar to spraying mode of mono-capillary,dripping,spindle,jet and multi-jet modes could be observed in spraying mode of multi-capillary.The modes could transits from one mode to another with varying applied voltage and flow rate.The two jets from double-capillary showed symmetrical skewed distribution due to Coulomb repulsive forces between them.Although there are different configurations for two kinds of capillaries,the spindle and pulsated jet modes could be observed.For these two modes,the frequency of spindle and pulsated jet ejected from the capillary would also increased and the swing range of the spindle and jet would reduce with an increase in electric Bond number.The transition from spindle to pulsated jet mode would be observed at a critical electric Bond number.With electric Bond number further increased,the multi-jet mode would be observed for two configurations.The number of jet increased with an increase in electrical Bond number.
Keywords：multi-capillaryelectro-spraying modenon-dimensional flow αelectric Bond number β
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 96-103 )