Volume 38, Number 3, June 2020
|Page(s)||494 - 500|
|Published online||06 August 2020|
Study of Morphology and Secondary Droplet Behaviors during Droplets Impacting on Static Hot Film
School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
The phenomenon of droplet impacting on hot film exists widely in nature and engineering applications. Considering limitations in current researches, an experimental setup to record the process of droplets impacting on hot film was built in this paper. Lots of experiments have been done and then the transitional threshold was established to determine impingement outcomes. The number of secondary droplets and the temperature of the secondary droplet are investigated based on the experimental results. The results show that impingement outcomes can be determined by the splashing parameter provided in this paper. The number of secondary droplets increases with the splash parameter, the probability distribution function of secondary droplet diameters follows the Weibull distribution. The temperature of secondary droplets is close to the hot film and almost all secondary droplets' temperature is above 90% of the hot film.
Key words: droplet / hot film / experiment / transitional threshold / secondary droplet / temperature / Weibull
关键字 : 冷液滴 / 热液膜 / 碰撞试验 / 判断准则 / 二次液滴 / 液滴温度
© 2019 Journal of Northwestern Polytechnical University. All rights reserved.
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