Nozzle flow and atomization characteristics of ethanol blended biodiesel fuel
Nozzle flow and atomization characteristics of ethanol blended biodiesel fuel
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DOI：
10.1016/j.renene.2009.06.012
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发表时间：
2010
期刊：
影响因子：
8.7
通讯作者：
Su Han Park;H. Suh;C. Lee
中科院分区：
文献类型：
--
作者：
Su Han Park;H. Suh;C. Lee
研究了生物柴油-乙醇混合燃料的喷射和雾化特性。利用喷射速率测量系统从喷射速率特性出发，利用喷嘴流动模型从有效喷射速度和有效喷雾直径出发，对生物柴油-乙醇混合燃料的喷射性能进行了分析。同时，对生物柴油-乙醇混合燃料的雾化特性（如局部和整体SMD分布、整体轴向速度和液滴到达时间）进行了分析，并与柴油和生物柴油进行了比较，得到了生物柴油-乙醇混合燃料的雾化特性。结果表明，乙醇燃料由于降低了燃料的密度和动态粘度等特性，使峰值喷射率降低，延迟期缩短。此外，乙醇的加入改善了生物柴油的雾化性能，因为乙醇混合燃料具有较低的运动粘度和表面张力，与环境气体的相互作用较BD 100更为活跃。
This study was conducted to investigate the injection and atomization characteristics of biodiesel–ethanol blended fuel. The injection performance of biodiesel–ethanol blended fuel was analyzed from the injection rate characteristics using the injection rate measuring system, and the effective injection velocity and effective spray diameter using the nozzle flow model. Moreover, the atomization characteristics, such as local and overall SMD distributions, overall axial velocity and droplet arrival time were analyzed and compared with these from diesel and biodiesel fuels to obtain the atomization characteristics of biodiesel–ethanol blended fuel. It was revealed that ethanol fuel affects the decrease of the peak injection rate and the shortening of the injection delay due to the decrease of fuel properties, such as fuel density and dynamic viscosity. In addition, the ethanol addition improved the atomization performance of biodiesel fuel, because the ethanol blended fuel has a low kinematic viscosity and surface tension, then that has more active interaction with the ambient gas, compared to BD100.