抄録
Secondary atomization of emulsified fuel in spray flame was visualized by magnified shadow imaging. An emulsified fuel spray was injected into a flame stabilized in a laminar counterflow field. Direct photography of the flame using a color high-speed video camera and magnified shadow imaging of spray droplets using a monochrome high-speed video camera were used. As a result, "blight spots" were observed in spray flame of the emulsified fuel, whereas it was rarely observed in spray flame of n-dodecane. Observations indicated that the droplet flame rapidly expanded. This expansion was linked to secondary atomization such as puffing and micro-explosion, which were visualized by magnified shadow imaging.
