Soot Formation in Spray Flames

Soot and oxygen concentrations, and temperature distribution in kerosene spray flames were measured to study the relation between soot formation and characteristics of spray flames. The distributions of soot and oxygen concentrations have an inverse tendency to each other. The maximum soot concentration and the minimum oxygen concentration are observed at the same location, which is the inside of the maximum temperature zone in the flame. As the ignition location in the spray comes closer to an atomizer, the maximum value of soot concentration on spray axis becomes lower. When the Sauter mean diameter of droplets in the spray is kept constant, the maximum soot concentration increases and its axial location comes closer to the atomizer, as the issuing momentum flux of a spray decreases.