Puffing and micro-explosion of diesel-biodiesel-ethanol blends
Puffing and micro-explosion of diesel-biodiesel-ethanol blends
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DOI：
10.1016/j.fuel.2015.10.107
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发表时间：
2016-02-15
期刊：
影响因子：
7.4
通讯作者：
Megaritis, Athanasios
中科院分区：
文献类型：
--
作者：
Avulapati, Madan Mohan;Ganippa, Lionel Christopher;Megaritis, Athanasios
由纯柴油、油菜籽甲酯 (RME) 组成的单个燃烧液滴的膨化和微爆炸；柴油-乙醇、柴油-RME、RME-乙醇的二元燃料混合物；使用高速背光成像方法研究了这些燃料混合物在不同组成下的三元微乳液。燃料滴悬浮在 130 pm 规格热电偶的尖端上，并使用电热塞加热器将其点燃。根据液滴投影面积的时间变化，将所研究的燃料液滴的特性分为平滑燃烧、膨化和爆炸。提出了三元图来识别可导致平稳燃烧、膨胀和爆炸的混合物的混合物组成。乙醇含量在10%~40%的三元共混物中观察到微爆炸现象。观察到悬浮母液滴的膨胀和爆炸产生的二次液滴经历进一步的爆炸。发现与二次液滴完全分解相关的时间尺度与柴油发动机中喷雾的混合和化学反应时间尺度相当。 (C) 2015 年作者。由爱思唯尔有限公司出版
The puffing and micro-explosion of a single burning droplet comprised of neat diesel, rapeseed methyl ester (RME); binary fuel mixtures of diesel-ethanol, diesel-RME, RME-ethanol; and ternary microemulsion of these fuel blends at various compositions have been studied using high speed backlight imaging method. Fuel droplet was suspended on the tip of a 130 pm gauge thermocouple and it was ignited using a glow plug heater. Based on the temporal variation of droplet projected area, the characteristics of fuel droplets studied were classified into smooth burning, puffing and explosion. A ternary plot has been proposed to identify the mixture composition of the blends that can result in smooth burning, puffing and explosion. Micro-explosion phenomenon was observed in the ternary blends with ethanol percentages between 10% and 40%. Secondary droplets resulted from the puffing and explosion of suspended parent droplet were observed to undergo further explosion. The time scales associated with complete disintegration of secondary droplets are found to be comparable to the mixing and the chemical reaction time scales of sprays in diesel engines. (C) 2015 The Authors. Published by Elsevier Ltd.