液体环二次破碎所形成云雾区基本特性的研究

An Investigation of Basic Behaviour of AtomizationRegion Formed by Secondary Breakup of Liquid Ring

二次破碎是液体抛撒、破碎和雾化过程中一个非常重要的阶段，这个过程直接影响到雾化液滴尺寸的分布。本文介绍了可移动式无膜激波管工作原理和在这种新实验设备上进行光学测量的理论依据和实验结果。实验结果表明，液体环二次破碎产生云雾区的液滴Ｓａｕｔｅｒ平均直径在固定点随时间的增加呈减小的趋势，而云雾区的宽度和云雾区前缘的液滴颗粒的Ｓａｕｔｅｒ平均直径则随测量的距离增加都有所增加。

The secondary breakup is a important phase in the process of dissemination,breakup and atomization of liquid.In this paper,a set of experiments have been conducted in a movable diaphragmless shock tube,and some experimental data have been obtained.The experimental results show that,at the fixed observing point,the Sauter mean diameter of the liquid drops which were generated by the secondary breakup of liquid annular decreased with the time,the Sauter mean diameter of liquid drops in the front part of atomization region and with of the atomization region increased with the increasing of measuring distance.