Abstract
The objective of this study was to investigate the effect of diesel fuels blended with various oxygenates on spray characteristics of plain-orifice nozzle. The oxygenates evaluated were DEE, DMM , diglyme and MTBE . Those were blended in weights of 5, 10, 15 , 20 and 30 % in a baseline diesel fuel. The influence of oxygenated fuels on spray characteristics was investigated by using the particle motion analysis system. The oxygenated fuels produced wider spray angle and shorter spray tip penetration than those of diesel fuel. SMD decreased with increase in blending ratio of four oxygenated fuels. It was found that the results in changes of spray characteristics were easily large enough to impact pollutant emissions from diesel engines when the oxygenated fuels are applied.