Abstract：Based on high-speed camera technology, the visualization study on the electro-spraying ejected from stainless steel twin-capillary was conducted, and the relationship among droplet separation cycle, applied voltage and electro-spraying mode was discussed. The results show that the dripping mode(skew-dripping), spindle, pulsated cone-jet, whipping-jet and multi-jet modes are observed in turn for ethanol with the increasing of electric potential. The included angle between the centerlines of atomization jet and the capillary is related to the electro-spraying modes and is increased with the increasing of applied voltage in dripping mode. The included angle changes little in spindle mode and changes intense in jet mode. The droplet separation cycle is also associated with the electro-spraying modes. In dripping and spindle modes, the time of droplet formation is far greater than that of falling down from the end of capillary, and the droplet separation cycle is decreased linearly with the increasing of applied voltage. For pulsated jet and whipping jet, the droplet separation cycle is very short. The droplet sizes are large for dripping and spindle modes, while the size is small for jet mode.
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2022, Vol. 43 
