摘要
为了研究燃油温度对GDI喷油器喷雾的影响,建立了喷油器喷雾特性的数学模型,并利用流体分析软件FLUENT在不同边界条件下对其孔内流动特性的影响。当燃油温度升高时,空穴现象更加明显;以及对喷雾形态、喷雾贯穿距、喷雾平均索特直径及喷雾锥角进行数值模拟研究,并通过试验来验证其喷雾特性。结果表明,数值模拟结果与试验结果相吻合,当燃油温度升高时,喷雾雾化效果提升不明显,喷雾贯穿距减小,索特平均直径减小,喷雾近场锥角增大,远场锥角减小。
In order to research the influence of fuel temperature on the GDI injector spray, and the flow characteristics of the hole under different boundary conditions are analyzed by using fluid analysis software FLUENT. The cavitation phenomenon is more obvious when the fuel temperature increases. The morphology of spray, spray penetration, spray Sauter mean diameter and spray cone angle is studied by numerical simulation through the experiment to verify. The results show that the numerical simulation result and the experimental result is consistent, when the fuel temperature increases and the spray atomization effect is not obvious ascension. The spray penetration decreases, Sauter mean diameter decreases and the spray cone angle increases with the increase of the near field and the decrease of far field cone angle.
出处
《汽车科技》
2016年第1期29-34,共6页
Auto Sci-Tech
关键词
GDI喷油器
孔内流动
喷雾特性
数值模拟
GDI injector
internal flow
spray characteristics
numerical simulation
