SC2-3: Effect of the fuel temperature on the atomization performance of diesel and biodiesel fuel(SC: Spray and Spray Combustion,General Session Papers)

概要

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The aim of this study is to investigate the effect of the fuel temperature on the spray behavior and atomization characteristics. As a test fuels, it was used biodiesel fuel derived from the soybean oil and the ultra low sulfur diesel (ULSD). In order to analyze the spray characteristics such as the spray tip penetration, spray cone angle and injection delay, the spray images were obtained from the visualization system. The droplet sizes (Sauter mean diameter, SMD) of test fuels were analyzed to investigate the atomization characteristics by using the droplet analyzer system It was revealed that the injection quantity increases a little according to the increase of the fuel temperature of because the decrease of internal friction and dynamic viscosity by increasing of fuel temperature. When the fuel temperature increases, the spray tip penetration of diesel fuel has similar values, however, that of biodiesel fuel decreases due to the fuel evaporation and reduction of spray momentum. As the fuel temperature increases, the ratio of detected droplet for the smaller size droplets decreases, and the ratio of the larger size droplets increases, remarkably. These results lead to the increase of the droplet size at the high fuel temperature.
一般社団法人日本機械学会の論文
2008-07-28