Evaporation characteristics of dual component droplet of benzyl azides-hexadecane mixtures at elevated temperatures

Evaporation characteristics of dual component droplet of benzyl azides-hexadecane mixtures at elevated temperatures
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苄基叠氮化物-十六烷混合物双组分液滴高温蒸发特性

DOI:
10.1016/j.fuel.2015.05.004
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发表时间:
2015-10
期刊:
影响因子:
7.4
通讯作者:
Yuchuan Li
Yuchuan Li
中科院分区:
工程技术1区
文献类型:
--
作者:
Geng Fu;Fujun Zhang;Siping Pang;Yuchuan Li

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利用悬浮液滴装置和高速摄像机对不同双组分液滴的蒸发特性进行了实验研究。研究了十六烷、十二烷-十六烷混合物和苄基叠氮-十六烷混合物的液滴。熔滴初始直径约为1.21-1.23 mm,由电炉提供473 - 773 K的高温环境。结果表明,在不同环境温度下,十二烷-十六烷混合液滴的蒸发趋势与十六烷相同,而在673 K高温下,苄叠氮化合物-十六烷混合液滴的蒸发特性与十六烷完全不同。在高温环境下,苄叠氮化合物-十六烷混合液滴的蒸发过程分为瞬态加热、波动蒸发和稳态蒸发三个阶段。由于苄基叠氮化合物在液相中的反应性,在苄基叠氮化合物-十六烷液滴中观察到气泡的形成和膨胀、液滴的变形、膨化和不完全微爆。此外,苄基叠氮化合物-十六烷混合液滴寿命的减少大于十二烷-十六烷混合液滴寿命的减少。苄叠氮化合物液相反应速率的提高是改善二元燃料液滴蒸发的主要原因。此外,随着叠氮苄质量分数的增加,叠氮苄-十六烷二元液滴寿命降低。
The evaporation characteristics of different dual component droplets are experimentally studied through a suspended droplet device and a high-speed video camera. The droplets of hexadecane, dodecane–hexadecane mixture and benzyl azides-hexadecane mixture are studied. The initial diameter of droplet is about 1.21–1.23 mm, and the elevated temperature environment in the range of 473 and 773 K is provided by an electric furnace. The results indicate that the evaporation trend of the dodecane–hexadecane blend droplet is the same as hexadecane at the different ambient temperatures, while the evaporation characteristics of the benzyl azides-hexadecane blend droplet are completely different from that of the dodecane–hexadecane at the high temperature of 673 K. The evaporation process of the benzyl azides-hexadecane blend droplet consists of three stages: transient heating, fluctuation evaporation and steady evaporation at the high ambient temperatures. The bubble formation and expansion, droplet distortion, puffing and incomplete micro-explosion are observed for benzyl azides-hexadecane droplet due to the reactivity of benzyl azides at liquid phase. Moreover, the reduction of the benzyl azides-hexadecane blend droplet lifetime is larger than that of the dodecane–hexadecane blend droplet with increasing ambient temperature. The increase of the liquid-phase reaction rate of benzyl azides is the main reason for improving the evaporation of the binary fuel droplet. In addition, with increasing benzyl azides mass fraction, the benzyl azides-hexadecane binary droplet lifetime decreases.
DOI: --
发表时间: 2003
期刊: Vehicle Engine
影响因子: --
作者:
Caifengyao Zhong
通讯作者: Caifengyao Zhong
DOI: 10.4271/2005-01-1545
发表时间: 2005-04
期刊: --
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作者:
C. Raffa;E. Schwarz;John Tasdemir
通讯作者: C. Raffa;E. Schwarz;John Tasdemir
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发表时间: 2006-06-01
影响因子: 1.9
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DOI: --
发表时间: 2006
期刊: Vehicle Engine
影响因子: --
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DOI: 10.1016/j.energy.2009.08.021
发表时间: 2010-02
期刊: Energy
影响因子: 9
作者:
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