关键词: 靶式喷嘴＋;燃油雾化;粒度;速度测量

Abstract: At target spray nozzle,high speed gas flow smashes the liquid film formed from jet impinging atomization into pieces. Atomizing flowfields at different vertical sections away from spray nozzle exit were measured by 3D PDPA system . The main respects measured are as follows:(1)The variation of particle mean velocity with Y ; (2) the proportion of particle number within different diameter ranges. The main results measured are as follows: (1) the target spray nozzle achieved good results; (2)atomized particle diameter decrease as ratio of air to water increases. (3)particle mean velocities are influenced by gravity

Key words: Target spray nozzle +;Fuel pulverization;Granularity;Velocity measurement