Host: The Japan Society of Mechanical Engineers
Name : Mechanical Engineering Congress,Japan
Date : September 11, 2016 - September 14, 2016
An experimental study was performed to investigate the influences of fuel nozzle shape on soot emission from coflow propane-air diffusion flame. Two different fuel nozzles, which have circular and square outlet shape respectively, were used in this study. Excess air ratio was varied by adjusting air flow rate with fuel flow rate kept constant. The soot discharge rate, flame luminosity and flame temperature are measured. Soot was collected by a glass filter and then the filter was weighed to obtain the mass of soot by an electric balance. The soot discharge rate is determined by dividing the mass of soot by suction time. The obtained results are summarized as follows: 1) When the excess air ratio is low, the soot discharge rate of the diffusion flame formed on square nozzle is lower than that formed on circular nozzle. 2) Comparing flame temperature in the upstream of the flame, the temperature of the square nozzle flame is higher than that of the circular nozzle flame. 3) The difference of nozzle shape changes the flame temperature and affects the soot emission.
