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首页> 外文期刊>International Journal of Multiphase Flow >Experimental statistics of droplet trajectory and air flow during aerodynamic fragmentation of liquid drops
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Experimental statistics of droplet trajectory and air flow during aerodynamic fragmentation of liquid drops

机译：液滴气动破碎过程中液滴轨迹和空气流动的实验统计

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摘要

The deformation and fragmentation of single ethyl alcohol drops injected into a continuous air-jet is experimentally investigated. High speed shadowgraphy coupled with image contour recognition is used to record the instantaneous droplet shape, trajectory, velocity and acceleration, while particle image velocimetry captures the gas-phase flow-field around the drop. All experiments are repeated hundreds of times in order to determine the statistics based mean flow behavior. Two conditions are considered-one which leads to the bag breakup morphology and one leading to the sheet-thinning morphology. Comparing the two cases, no significant differences are observed in the structure of the gas-phase wake, indicating that gas-phase flow morphologies may not significantly affect the transition between liquid-phase breakup morphologies. The results of this investigation will be useful for the development and validation of simulation techniques.
机译：实验研究了注入到连续空气喷嘴中的单个乙醇液滴的变形和破碎。高速阴影照相结合图像轮廓识别可用于记录瞬时液滴形状，轨迹，速度和加速度，而粒子图像测速仪可捕获液滴周围的气相流场。为了确定基于统计的平均流量行为，所有实验都重复了数百次。考虑两个条件，一个导致袋破裂形态，一个导致薄片变薄形态。比较这两种情况，在气相尾流的结构上没有观察到显着差异，这表明气相流动形态可能不会显着影响液相分解形态之间的过渡。研究的结果将对仿真技术的开发和验证有用。

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