Abstract:The influences of parameters, such as delivery tube structure, gas pressure and the distance between the primary atomizer and the secondary atomizer, on gas flow field were investigated by simulation. The effects of primary pressure on gas velocity at the centerline were compared. Water atomizing experiment was carried out to validate gas scatter angle. The results show that the structure of primary atomizer plays an important role in the flow field near the exit of delivery tube. Metal protector with conical surface at the body extends certain length into the gas flow field to generate greater negative pressure near the tip of delivery tube. The application of primary gas can suppress the circulation generated by only using the secondary atomizer.

Key words: atomization; gas flow field; simulation