Abstract Fundamental study on breakup of the supercooled large droplet is important for understanding the microphysical phenomenon in aircraft icing. The deformation and breakup processes of water droplets with diameters in the range of 700 to 1000 microns injected into continuous air jet flow are investigated experimentally. Evolutions of the bag, the bag and stamen and the dual breakup morphology are recorded through the high-speed photography. Experiments are repeated 319 times to determine the statistics based dynamic behavior, including the mean deformation rate, velocity and duration. As concluded, minimum value of the droplet deformation rate in the x-direction increases from 0.46 to 0.72 when Weber number increases from 18 to 56. When the initial droplet breaks, the velocity of droplet tip is more than two times of the velocity of droplet terminal. Duration of the deformation stage accounts for about half of the total duration. Besides, a new interpretation of physical mechanism, combining effects of the aerodynamic drag, motion hysteresis and inertia, is proposed to explain formation and development of different deformation and breakup morphologies. This work is meaningful for the development of numerical simulation and theoretical models.

中文翻译：

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连续空气射流中微米级水滴变形及破碎行为的实验统计

摘要 过冷大液滴破碎的基础研究对于理解飞机结冰的微物理现象具有重要意义。实验研究了注入连续空气射流中直径在 700 到 1000 微米范围内的水滴的变形和破碎过程。通过高速摄影记录袋子、袋子和雄蕊的演变以及双重分裂形态。实验重复 319 次以确定基于统计的动态行为，包括平均变形率、速度和持续时间。综上所述，当韦伯数从 18 增加到 56 时，x 方向上液滴变形率的最小值从 0.46 增加到 0.72。当初始液滴破裂时，液滴尖端的速度是液滴末端速度的两倍以上。变形阶段的持续时间约占总持续时间的一半。此外，提出了一种新的物理机制解释，结合气动阻力、运动滞后和惯性的影响，解释了不同变形和破碎形态的形成和发展。这项工作对数值模拟和理论模型的发展具有重要意义。