An Experimental study on spray and atomization characteristics of advanced co-optima biofuels

View Video Presentation: https://doi.org/10.2514/6.2022-1259.vid This study was conducted to investigate the spray and atomization characteristics of advanced co-optima biofuels (Dodecane, Butylcyclohexane, Formaldehyde Dibutyl Acetyl, and Nonanol). Spray-atomization characteristics, which are spray tip penetration, spray cone angle, and Sauter Mean Diameter, were investigated and analyzed for different biofuels and compared with conventional diesel fuel. Spray tip penetration and spray cone angle characteristics were obtained from the line-of-sight measurements using high-speed imaging. Sauter Mean Diameter was captured utilizing a Phase Doppler Interferometer. Macroscopic analysis of the injector revealed that the temporal evolution of spray cone angle pertaining to these neat fuels is directly correlated to the Aerodynamic Weber Number. However, the breakup length characterized from resolving spray tip penetration was found to be inversely related to the Aerodynamic Weber Number. It was additionally found that Dodecane produced the largest cone angle, and Diesel produced the smallest cone angle. Furthermore, Dodecane produced the smallest SMD, and Diesel produced the largest SMD, portraying an inverse correlation between spray cone angle and SMD.