An investigation was conducted to quantify the unsteady heat transfer and phase changing process of a large droplet impinging onto cold surface under different surface temperature

through high speed imaging and infrared thermal imaging technology. In addition

a new method of deicing was presented. The deicing experiment using high-frequency nanosecond pulse dielectric barrier discharge plasma actuator was conducted

and thermodynamic analysis was also carried out. The results reveal that cold surface temperature has little effect on the spreading process

but has obvious effect on receding process

oscillation process and final ice shape. The icing starts at the bottom of the droplet

with the decrease of the wall surface temperature

the temperature difference between droplet and cold wall surface get bigger

hence the underlying liquid droplet freeze faster

the liquid film on the top of droplet get thinner

and the time needed for freezing phase change get shorter. By using high-frequency nanosecond pulse dielectric barrier discharge

the deicing effect is obvious

and the discharge area acts seem as a “heat source”. According to the way it functions

the process of deicing can be divided into two stages.