Characteristics of non-evaporating, evaporating and burning sprays of hydrous ethanol diesel emulsified fuels
Characteristics of non-evaporating, evaporating and burning sprays of hydrous ethanol diesel emulsified fuels
复制标题
含水乙醇柴油乳化燃料的非蒸发、蒸发和燃烧喷雾特性
DOI：
10.1016/j.fuel.2016.11.070
复制
发表时间：
2017-03
期刊：
影响因子：
7.4
通讯作者：
Ming Zheng
中科院分区：
文献类型：
--
作者：
Bin Wang;Tao Guo;Qi Shi;Ming Zheng
在柴油发动机中使用含水乙醇不仅有利于减少废气污染物排放，而且有利于提高发动机和炼油厂的生命周期燃料效率。然而，迄今为止，含水乙醇柴油乳化燃料的喷雾燃烧特性的详细研究很少报道，虽然这方面的信息是至关重要的燃烧系统设计，更好地应用这些燃料在柴油机上。本文首次研制了含水乙醇体积分数为10 ~ 30%的柴油与含水乙醇质量分数为20%的柴油的乳状液。然后，对混合物的稳定性、密度、运动粘度、表面张力、蒸馏温度、蒸发潜热等理化性质进行了研究。最后，利用共轨燃油喷射系统和高温高压定容燃烧室，研究了不同喷射条件和环境条件下的非蒸发、蒸发和燃烧喷雾特性。结果表明，不同燃料在非蒸发和蒸发条件下的喷雾锥角和尖端穿透长度差异较小，而蒸发喷雾中液体的最大穿透长度随含水乙醇添加量的增加而急剧增加。在喷雾燃烧的情况下，火焰的自然光度随含水乙醇的增加而显著降低，表明火焰中的碳烟减少。随着环境氧浓度的降低，这种效应变得更加明显。深入探讨了上述现象的发生机制。
Utilization of hydrous ethanol in diesel engines is beneficial not only for reducing the exhaust pollutant emissions but also for improving the lifecycle fuel efficiency including both in engines and refineries. However, so far detailed investigations on spray combustion characteristics of hydrous ethanol diesel emulsified fuels are rarely reported, though this information is crucial in combustion system design for better application of these fuels in diesel engines. In this paper, emulsions of the 20 wt% water-containing ethanol and commercial diesel fuel with volume fraction of the hydrous ethanol varied from 10 to 30% were firstly developed. Then, the physicochemical properties including the mixture stability, density, kinematic viscosity, surface tension, distillation temperature, latent heat of evaporation, etc. were investigated. Finally, the characteristics of non-evaporating, evaporating and burning sprays under the various injection and ambient conditions were clarified with the common-rail fuel injection system and the high-temperature, high-pressure, constant-volume combustion vessel. The results reveal that the difference of the spray cone angle and tip penetration length under either the non-evaporating or evaporating conditions for various fuels are relatively small, while the maximum liquid penetration length in the evaporating spray increases drastically with increased addition of the hydrous ethanol in the emulsions. In the case of burning spray, the natural luminosity of the flame decreases remarkably with the hydrous ethanol increasing, indicating the soot reduction in the flame. This effect becomes more pronounced with the ambient oxygen concentration decreasing. The mechanism of the above phenomena is discussed in depth.
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DOI：
10.1115/1.4028771
发表时间：
2015-05-01
影响因子：
3
作者：
Fang, Wei;Fang, Junhua;Northrop, William F.
通讯作者：
Northrop, William F.
影响因子：
7.4
作者：
J. Pastor;J. M. García-Oliver;Jean-Guillaume Nerva;B. Giménez
通讯作者：
J. Pastor;J. M. García-Oliver;Jean-Guillaume Nerva;B. Giménez
影响因子：
10.4
作者：
Ronnachart Munsin;Y. Laoonual;S. Jugjai;M. Matsuki;H. Kosaka
通讯作者：
Ronnachart Munsin;Y. Laoonual;S. Jugjai;M. Matsuki;H. Kosaka
DOI：
10.1299/jsme1958.3.123
发表时间：
1959
期刊：
Jsme International Journal Series B-fluids and Thermal Engineering
影响因子：
--
作者：
Y. Wakuri;Masaru Fujii;T. Amitani;R. Tsuneya
通讯作者：
Y. Wakuri;Masaru Fujii;T. Amitani;R. Tsuneya
影响因子：
7.4
作者：
Andrés F. López;Marlon Cadrazco;Andrés F. Agudelo;L. Corredor;Juan A. Vélez;J. Agudelo
通讯作者：
Andrés F. López;Marlon Cadrazco;Andrés F. Agudelo;L. Corredor;Juan A. Vélez;J. Agudelo