A numerical study of airflow and spray transport from electrostatic rotary cup atomizer using KIVA-3V program is carried out. The interaction between the electrical field and the droplet dynamics are accounted for by considering the electric field between the six external electrodes and an infinite large grounded target plane. For simplicity, water is used as the atomization fluid. The numerical results show that the electrostatic field speed up spray droplet speed and improve transfer efficiency. Breakup model produces smaller drops which are entrained into the center recirculation zone. The results of a parametric study considering typical automotive operation conditions, including different cup rotational speed, shaping airflow rate, liquid flow rate, target distance, charge-mass ratio are also summarized.
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