In this work, atomization of the liquid sheet formed by two like-on-like impinging liquid jets is studied experimentally. The primary focus of this study concerns sheet breakup due to the formation and growth of perforations on the liquid sheet. In this mode of atomization, perforations or holes originate at a location where the liquid sheet becomes thin due to stretching. As time elapses, these perforations will grow in size and move either toward the bottom or toward the rim of the sheet. Depending on the initial location of their formation, these perforations either interact with the rim of the sheet or with other surrounding perforations and disintegrate the sheet into ligaments, which further disintegrate into drops. The phenomenon of perforation formation and growth is captured using a high-speed backlight imaging technique and processed using in-house-developed image processing algorithms based on MATLAB. The effect of liquid properties and Reynolds number on the growth of perforations is studied in this work. Based on the experiments conducted in this study, perforation-based atomization is broadly classified into three different modes. In the first mode, a single perforation interacts with the rim and disintegrates the sheet into ligaments. In the second mode, two or more perforations interact, and their common area of interaction is disintegrated into ligaments and droplets. In the third mode, the liquid sheet breaks up due to perforation interaction with impact waves. Studies on atomization behavior of the liquid sheet at high ambient pressure up to 0.8 MPa revealed improved atomization.

中文翻译：

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冲击射流雾化穿孔导致的液体片材破碎的实验研究

在这项工作中，实验研究了由两个类对类撞击液体射流形成的液层的雾化。本研究的主要关注点是由于液体层上穿孔的形成和生长导致的层破裂。在这种雾化模式中，穿孔或孔洞起源于液层由于拉伸而变薄的位置。随着时间的流逝，这些孔眼的尺寸会变大并朝底部或朝片材边缘移动。根据它们形成的初始位置，这些穿孔要么与薄片的边缘相互作用，要么与其他周围的穿孔相互作用，并将薄片分解成韧带，韧带进一步分解成液滴。使用高速背光成像技术捕捉穿孔形成和生长的现象，并使用基于 MATLAB 的内部开发的图像处理算法进行处理。本文研究了液体性质和雷诺数对射孔生长的影响。根据本研究中进行的实验，基于穿孔的雾化大致分为三种不同的模式。在第一种模式中，单个穿孔与轮辋相互作用并将薄片分解成韧带。在第二种模式中，两个或多个穿孔相互作用，它们的共同相互作用区域分解成韧带和液滴。在第三种模式中，由于穿孔与冲击波的相互作用，液层破裂。高至0环境压力下液层雾化行为的研究。