Abstract
The electrostatic spraying of liquids was investigated by using dc and ac voltages as a power supply under various experimental conditions.
The relation between spraying modes and controlling factors, in particular, varieties of applied power supply was examined. Three typical spraying modes appeared as the voltage was increased in the case of positive dc power supply, while, in the negative dc case, one additional singular mode with strong corona discharge appeared at high voltages above 20kV. These modes were divided into domains in terms of voltage and mass flow rate.
It is concluded that the positive do voltage is the most suitable power supply for liquid atomization in view of the fact that it gives droplets finer than negative dc or ac voltage. The general behaviour of liquid sprays observed in this experiment roughly coincide with those of the previous work.
