An experimental study of injection and spray characteristics of diesel and gasoline blends on a common rail injection system

An experimental study of injection and spray characteristics of diesel and gasoline blends on a common rail injection system
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共轨喷射系统柴油和汽油混合物喷射和喷雾特性的实验研究

DOI:
10.1016/j.energy.2014.08.006
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发表时间:
2014-10
期刊:
影响因子:
9
通讯作者:
Zhen Huang
Zhen Huang
中科院分区:
工程技术1区
文献类型:
--
作者:
Chunhai Wang;Yaozong Duan;Zhisong Tian;Zhen Huang

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在共轨喷射系统上研究了柴油和汽油混合燃料的喷射和喷雾特性。分析了喷油规律、喷雾演化过程(尖端贯穿距离、喷雾锥角、喷雾投影面积和相对亮度强度等值线)和微观液滴特征。结果表明,柴油和汽油混合燃料具有较高的容积喷射速率、较早的喷射开始和较短的喷射延迟,但不同试验燃料的质量喷射速率差异不大。随着汽油比例的增加,喷雾锥角增大,但贯穿距离略有减小。同时,柴油和汽油混合燃料的射流中观察到更多的较小尺寸的液滴,表明喷雾破碎和雾化过程得到促进。
The injection and spray characteristics of diesel and gasoline blends are investigated on a common rail injection system. The injection rate, fuel spray evolution process (tip penetration distance, spray cone angle, projected spray area and relative brightness intensity contour) and microscopic droplet features are analyzed. The results show that diesel and gasoline blends have higher volumetric injection rates, earlier starts of injection and shorter injection delays, but little variances are observed in the mass injection rates for different test fuels. Increased gasoline proportion in the test blends causes slightly decreased spray tip penetration distance but increased spray cone angle. Also, more smaller-size droplets are observed in the fuel jet of the diesel and gasoline blends, indicating that the spray breakup and atomization processes are promoted.
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