Abstract
In this research, secondary atomization of emulsififed fuel spray was investigated. An emulsified fuel spray was injected into the high temperature inert gas, and its secondary atomization behavior was observed by a high-speed video camera with shadow imaging method. As a result, spray droplets with a diameter of around 50 μm were clearly visualized. Puffing behavior of spray droplets was also clearly visualized. Puffing behavior of spray droplet observed in this research was quite similar to that of single droplet with a diameter of about 1 mm. Time scale of puffing was about 1/100,000 sec. Comparison of spray droplet diameter of emulsified fuel with that of n-dodecane spray showed that secondary atomization improved spray characteristics.
