Puffing/micro-explosion of two closely spaced composite droplets in tandem: experimental results and modelling
Puffing/micro-explosion of two closely spaced composite droplets in tandem: experimental results and modelling
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DOI：
10.1016/j.ijheatmasstransfer.2021.121449
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发表时间：
2021-05
影响因子：
5.2
通讯作者：
D. Antonov;R. Fedorenko;P. Strizhak;G. Castanet;S. Sazhin
中科院分区：
文献类型：
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作者：
D. Antonov;R. Fedorenko;P. Strizhak;G. Castanet;S. Sazhin
实验和理论研究的结果，他们的膨化/微爆炸液滴在流中的相互影响，使用的例子中的两个紧密间隔的液滴串联，提出。结果表明，先导液滴的膨化/微爆时间（τ p）总是小于下游液滴的膨化/微爆时间（τ p），且两者的差异随液滴间距除以液滴初始直径（2 RD 0）的增大而减小.结果表明，两种液滴的τ p均随R d 0的增大而增大.实验结果被解释在先前开发的模型燃料/水滴膨化/微爆炸，假设水的子液滴位于燃料液滴的中心，这个过程被触发时，在水/燃料界面的温度达到水的成核温度的基础上。铅和下游液滴之间的相互作用的影响被考虑到通过修改这些液滴的Nusselt和舍伍德数使用数值计算的结果。实验观察到的和预测值的τ p示出增加与增加的R d 0。他们被证明是较长的下游液滴比铅液滴。实验观察到的前导液滴和下游液滴的τ p差异接近预测差异。
The results of the experimental and theoretical investigations of the mutual effect on their puffing/micro-explosion of droplets in a flow, using an example of two closely spaced droplets in tandem, are presented. It is shown that the time to puffing/micro-explosion (τ p) of the lead droplet is always shorter than that of the downstream droplet, and the difference between them decreases with increasing distance between droplets divided by their initial diameters (2 R d 0). It is shown that the τ p of both droplets increases with increasing R d 0. The experimental results are interpreted in terms of the previously developed model for fuel/water droplet puffing/micro-explosion, based on the assumptions that the water sub-droplet is located in the centre of the fuel droplet and that this process is triggered when the temperature at the water/fuel interface reaches the water nucleation temperature. The effect of interaction between the lead and downstream droplets is taken into account via modifications to the Nusselt and Sherwood numbers for these droplets using the results of numerical calculations. Both experimentally observed and predicted values of τ p are shown to increase with increasing R d 0. They are shown to be longer for the downstream droplets than for the lead droplets. The experimentally observed differences in τ p for the lead and downstream droplets are close to the predicted differences.