Micro-explosion of a water-in-hexadecane compound drop
Micro-explosion of a water-in-hexadecane compound drop
复制标题
DOI：
10.1080/02533839.2012.679075
复制
发表时间：
2012-06
影响因子：
1.1
通讯作者：
Wei-Dong Hsieh;Rong-Horng Chen;Cheng-Wen Chen;S. Chiu;Ta-Hui Lin
中科院分区：
文献类型：
--
作者：
Wei-Dong Hsieh;Rong-Horng Chen;Cheng-Wen Chen;S. Chiu;Ta-Hui Lin
对油包水复合液滴在无乳化条件下的微爆炸进行了实验研究。将正十六烷壳包裹水核的复合液滴悬浮加热至微爆。通过高速摄像系统记录了加热过程和微爆行为，并在320°C、400°C和500°C三种环境温度下测量了复合液滴的温度历程。根据高速摄像机记录的微爆炸结果，将微爆炸行为分为直接爆炸、部分爆炸和膨胀3种模式。在400°C或500°C的环境温度下，观察到微爆起始时间随着微爆温度的增加而增加;但对于320°C的环境温度，这种趋势不那么明显。从二次液滴的产生来看，微爆的强度随着微爆时间的延长而增大，这是因为过饱和水芯液滴中热能的积累程度增大。
The micro-explosion of a water-in-oil compound drop, without emulsification, was investigated experimentally. The compound drop, composed of a water core encased by an n-hexadecane shell, was suspended and heated to micro-explosion. The heating process and the micro-explosion behavior were recorded by a high-speed video system, and the temperature history of the compound drop was measured under three ambient temperatures, namely 320°C, 400°C and 500°C. The behaviors of the micro-explosion were grouped into three modes, namely direct explosion, partial explosion, and swelling, according to the outcomes of micro-explosion recorded by the high-speed video camera. At an ambient temperature of 400°C or 500°C, the micro-explosion onset time was observed to increase with the micro-explosion temperature; but this trend was not as obvious for the ambient temperature of 320°C. The intensity, judged from the production of secondary drops, of the micro-explosion rose as the micro-explosion time lengthened because the accumulation of thermal energy within the oversaturated water core drop grew to a higher extent.