Nonmonotonic Effects of Aerodynamic Force on Droplet Size of Prefilming Air-Blast Atomization,Industrial & Engineering Chemistry Research

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Nonmonotonic Effects of Aerodynamic Force on Droplet Size of Prefilming Air-Blast Atomization
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-01-29 00:00:00 , DOI: 10.1021/acs.iecr.7b05026
Hui Zhao _{1,

2} , Zhao-Wei Wu ₁ , Wei-Feng Li ₁ , Jian-Liang Xu ₁ , Hai-Feng Liu ₁

Affiliation

The goal of this investigation is to improve the understanding of the mechanism on prefilming atomization. The coaxial two-fluid prefilming air-blast atomization has two airflows: inner air jet and outer air jet. It is generally believed that droplet size decreases monotonically with increasing gas velocity in air-blast atomization. However, this work shows that in prefilming atomization the droplet size increases with the increase of gas velocity and then decreases with the increase of gas velocity when the velocity of the other airflow is high. The relationship between two air jets in prefilming air-blast atomization is mutual restriction rather than assistance. To investigate the nonmonotonic phenomenon, the modified Kelvin-Helmhotz and Rayleigh-Taylor instability atomization model for the prefilming air-blast nozzle is induced. This study presents the model developed to predict the performance of coaxial atomizers, and the experimental results are consistent with the model estimates.

中文翻译：

空气动力对成膜前鼓风雾化液滴尺寸的非单调影响

这项研究的目的是增进对预膜雾化机理的理解。同轴两流体预成膜鼓风雾化具有两种气流：内部气流和外部气流。通常认为，在鼓风雾化中，液滴尺寸随着气体速度的增加而单调减小。但是，这项工作表明，在预成膜雾化过程中，当另一气流的速度较高时，液滴尺寸会随气体速度的增加而增加，然后随气体速度的增加而减小。在预成膜的鼓风雾化过程中，两个空气喷嘴之间的关系是相互制约而不是相互帮助。为了研究非单调现象，引入了用于预成膜鼓风喷嘴的改进的Kelvin-Helmhotz和Rayleigh-Taylor不稳定性雾化模型。

更新日期：2018-01-29

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