ディーゼル噴霧の初期液滴群の空間分布

抄録

Spatial characteristics of fine droplets formed at an initial injection stage has a great influence on mixture formation and ignition of diesel sprays. In this paper, a size and shape of each droplet near a nozzle tip has been analyzed by the back light illumination photography using a nano-spark light technique. The results show that fine droplets are formed immediately after 50μs from the commencement of the injection near the nozzle tip regardless of different nozzle hole sizes. Then, at the early stage of the injection period, the structure like a branch occurs at the periphery of a dense spray behind a spray tip and a number of fine droplets were produced in this region.