Analysis of Diesel Spray Droplets Behavior using Shadowgraph Technique Images

This study investigates the effects of injection pressure and ambient temperature on distribution of number density and diameter of fuel droplet in diesel fuel spray by using shadow-graph photography technique. The large number of fuel droplets was statistically analyzed by
newly developed algorithm. The results show that the larger-size particles exist closer to the spray tip. Higher injection pressure promotes atomization and high ambient temperature has great effect on formation of small-size droplet at early time of injection period, especially at up and midstream of the spray.