Atomization and spray characteristics of bioethanol and bioethanol blended gasoline fuel injected through a direct injection gasoline injector

作者：Park Su Han; Kim Hyung Jun; Suh Hyun Kyu; Lee Chang Sik^*

来源：International Journal of Heat and Fluid Flow, 2009, 30(6): 1183-1192.

DOI：10.1016/j.ijheatfluidflow.2009.07.002

• Atomization
• Bioethanol
• E85
• Linearized instability sheet atomization (LISA) model
• Spray tip penetration
• Sauter mean diameter (SMD)

The focus of this study was to investigate the spray characteristics and atomization performance of gasoline fuel (G100), bioethanol fuel (E100), and bioethanol blended gasoline fuel (E85) in a direct injection gasoline injector in a gasoline engine. The overall spray and atomization characteristics such as an axial spray tip penetration, spray width, and overall SMD were measured experimentally and predicted by using KIVA-3V code.
The development process and the appearance timing of the vortices in the test fuels were very similar. In addition, the numerical results accurately described the experimentally observed spray development pattern and shape, the beginning position of the vortex, and the spray breakup on the spray surface. Moreover, the increased injection pressure induced the occurrence of a clear circular shape in the downstream spray and a uniform mixture between the injected spray droplets and ambient air. The axial spray tip penetrations of the test fuels were similar, while the spray width and spray cone angle of El 00 were slightly larger than the other fuels. In terms of atomization performance, the El 00 fuel among the tested fuels had the largest droplet size because E100 has a high kinematic viscosity and surface tension.

• 出版日期2009-12