ORIGINAL PAPER
Combustion Characteristics and Flame Behavior of Premixed Mixtures Supported by Pilot Flames with Different Equivalence Ratio
2019 Volume 61 Issue 196 Pages 149-154
Details
2019 Volume 61 Issue 196 Pages 149-154
In this study, we have investigated the combustion characteristics of premixed mixtures supported by pilot flames with different equivalence ratio. The flame behavior was measured by OH-PLIF imaging. The turbulent flames were stabilized in a cyclone-jet combustor. The fuel was propane. The main jet velocity and the cyclone jet velocity were fixed at 10 or 30 m/s. On the other hand, these equivalence ratios were widely changed. When the extinction limit was measured, the equivalence ratio of the main jet was decreased by keeping that of the cyclone jet in the range of φp = 0 - 5.0. The overall equivalence ratio was one parameter for discussing the flame stability and the emission characteristics. Results showed that the equivalence ratio of the cyclone jet greatly affected the flame extinction limit. The soot concentration was almost zero for all conditions in this experimental condition. EINOx was smaller as the overall equivalence ratio decreased.
