Behavior of Small Droplet Impinging on a Hot Surface
Behavior of Small Droplet Impinging on a Hot Surface
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DOI：
10.1080/01457632.2013.812496
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发表时间：
2014-01
影响因子：
2.3
通讯作者：
S. Fukuda;M. Kohno;K. Tagashira;Nobuya Ishihara;S. Hidaka;Y. Takata
中科院分区：
文献类型：
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作者：
S. Fukuda;M. Kohno;K. Tagashira;Nobuya Ishihara;S. Hidaka;Y. Takata
研究了液滴直径、表面粗糙度和撞击速度对液滴撞击热表面行为的影响。实验中使用的表面样品是具有四种不同粗糙度的不锈钢气缸体：Ra 0.04、Ra 0.2、Ra 3和Ra 10。采用微射流分散器对颗粒直径和撞击速度进行独立控制，其值分别在300-700 μm和1.0- 4.0m/s范围内。的接触时间被认为是增加与表面粗糙度的增加，是水滴的自振荡的顺序。液滴的最大扩展随撞击速度的增加而减小。获得了表面温度在500°C至100°C范围内的冷却曲线，并且发现冷却时间随着不锈钢表面粗糙度的增加而减少。此外，每个液滴的冷却效率增加的表面粗糙度的增加，在液滴直径的减小，和在撞击速度的增加。
The effects of droplet diameter, surface roughness, and impinging velocity on the behavior of a droplet impinging on a hot surface were studied. The surface samples used in the experiment were cylinder blocks of stainless steel having four different degrees of roughness: Ra 0.04, Ra 0.2, Ra 3, and Ra 10. The diameter and impinging velocity were controlled independently using a microjet dispenser, and their values were in the ranges of 300–700 μm and 1.0–4.0 m/s, respectively. The contact time was found to increase with an increase in the surface roughness and was of the order of the self-oscillation of the water droplet. The maximum spread of the droplet decreased with increasing impinging velocity. A cooling curve was obtained for surface temperatures ranging from 500°C to 100°C, and the cooling time was found to decrease with an increase in the surface roughness of stainless steel. Moreover, the cooling effectiveness of each droplet increased with an increase in the surface roughness, a decrease in the droplet diameter, and an increase in the impinging velocity.