Study on micro-explosion intensity characteristics of biodiesel, RP-3 and ethanol mixed droplets
Study on micro-explosion intensity characteristics of biodiesel, RP-3 and ethanol mixed droplets
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DOI：
10.1016/j.fuel.2019.115942
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发表时间：
2019-11
期刊：
影响因子：
7.4
通讯作者：
Kesheng Meng;Wei Fu;Y. Lei;Dongmei Zhao;Qizhao Lin;Gaofeng Wang
中科院分区：
文献类型：
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作者：
Kesheng Meng;Wei Fu;Y. Lei;Dongmei Zhao;Qizhao Lin;Gaofeng Wang
设计了一种测量微小液滴体积的方法，并利用该方法制备了10种相同体积、不同比例的航空燃料（RP-3）、生物柴油和乙醇混合液滴。搭建了两种观察液滴微爆炸的实验平台（加热板和管式炉）。利用由7块加热板组成的燃烧室、可控移动滑轨等设备组成的加热板实验平台，研究了混合液滴在高环境温度（480℃）下的膨胀、喷射和微爆特性。 BD10R20E70和BD40R50E10混合液滴在实验中产生了喷射和膨胀现象，其他种类的混合液滴不仅产生了膨胀和喷射，而且还产生了微爆炸，但这些微爆炸的强度不同。此外，在BD40R10E50液滴的加热实验中还观察到了液滴的二次微爆炸。建立了微爆炸强度计算方程，计算了10种混合液滴的微爆炸强度。通过对微爆炸强度值的分析，区分出四种不同级别的微爆炸强度。利用管式炉实验平台对BD60R10E30和BD60E40混合液滴的微爆炸特性进行了对比分析。分析了两种混合液滴微爆强度差异的原因，验证了微爆强度划分的合理性。
A method to measure the volume of tiny droplets was designed, and 10 kinds of aviation fuel (RP-3), biodiesel and ethanol mixed droplets with the same volume and different proportions were prepared by using this method. Two kinds of experimental platforms (heating plate and tube furnace) for observing droplet micro-explosion were established. The expansion, ejection and micro-explosion characteristics of mixed droplets at high ambient temperature (480 °C) were studied by a heating plate experimental platform consisting of a combustion chamber composed of 7 heating plates, a controllable movable slide rail and other equipment. The BD10R20E70 and BD40R50E10 mixed droplets produced ejection and expansion phenomena in the experiment, other kinds of mixed droplets not only produced expansion and ejection, but also produced micro-explosion, but the intensity of these micro-explosion was different. Moreover, secondary micro-explosion of droplets was also observed in the heating experiment of BD40R10E50 droplet. The calculation equation of micro-explosion intensity was established and the micro-explosion intensity of 10 kinds of mixed droplets was calculated. Through the analysis of the micro-explosion intensity value, four different levels of micro-explosion intensity were distinguished. The micro-explosion characteristics of BD60R10E30 and BD60E40 mixed droplets were compared and analyzed by using a tubular furnace experimental platform. The reason for the difference in micro-explosion intensity between the two mixed droplets was analyzed, and the rationality of the division of micro-explosion strength was verified.