Experimental Study of Time-Dependent Evolution of Water Droplet Breakup in High-Speed Air Flows
Experimental Study of Time-Dependent Evolution of Water Droplet Breakup in High-Speed Air Flows
复制标题
高速气流中水滴破碎随时间演化的实验研究
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
K. Moon
中科院分区：
文献类型：
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作者：
G. Park;G. Yeom;Y. Hong;K. Moon
本文介绍了高速气流中水滴破碎的实验数据。使用阴影图技术以光学方式可视化波和液滴相互作用以及破碎过程的精确时间依赖性演化。液滴实验在激波管中进行。使用五种流动条件，入射冲击波马赫数为 1.40 至 2.19，韦伯数分别基于液滴初始直径为 2300 至 38000。这对应于从亚音速到超音速变化的冲击后流速。考虑的液滴直径为 2.0 毫米至 3.6 毫米。在近尾流中发现了一些有趣的波浪模式。目前的数据表明，随着韦伯数的增加，液滴加速系数下降，并且对于较高马赫数的情况，下降程度较弱。这种情况与文献中现有的数据不同。讨论了可能的原因。
This paper presents experimental data on water droplet breakup in high-speed air flows. Exact-time-dependent evolution of wave and droplet interaction as well as breakup processes were optically visualized using a shadowgraph technique. Droplet experiments were conducted in a shock tube. Five flow conditions were used with an incident shock wave Mach number from 1.40 to 2.19 with Weber number based on the droplet initial diameter from 2300 to 38000, respectively. This corresponds to post-shock flow speeds varying from subsonic to supersonic. The considered droplet diameters were 2.0 mm to 3.6 mm. Some interesting wave patterns in the near wake were found. The present data shows that with an increase in the Weber number the droplet acceleration coefficient decreases and the level of decrease was weaker for the case of higher Mach numbers. This state of affair is different to the existing data in literature. Possible reasons are discussed.