Rear-Surface Deformation of a Water Drop in Aero-Breakup of Shear Mode  

作　　者：易翔宇 朱雨建 杨基明 王暾 孙明宇 

机构地区：[1]Department of Modern Mechanics,University of Science and Technology of China [2]Institute of Fluid Science,Tohoku University

出　　处：《Chinese Physics Letters》2017年第8期92-95,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11102204,11572313 and 11621202;the Natural Science Foundation of Anhui Province under Grant No 1608085MA16

摘　　要：Deformation of water drops in shock-induced high-speed flows is investigated with a focus to the influence of primitive flow parameters on the rear-surface deformation features. Two typical deformation patterns are discovered through high-speed photography. A simple equation to evaluate the radial acceleration of the drop surface is derived. The combined use of this equation and outer flow simulation makes it possible for us to reconstruct the profiles of the early deformed drops. The results agree well with the experiments. Further analysis shows that the duration of flow establishment with respect to the overall breakup time shapes the rear side profile of the drop. Thereby the ratio of the two times, expressed as the square root of the density ratio, appears to be an effective indicator of the deformation features.Deformation of water drops in shock-induced high-speed flows is investigated with a focus to the influence of primitive flow parameters on the rear-surface deformation features. Two typical deformation patterns are discovered through high-speed photography. A simple equation to evaluate the radial acceleration of the drop surface is derived. The combined use of this equation and outer flow simulation makes it possible for us to reconstruct the profiles of the early deformed drops. The results agree well with the experiments. Further analysis shows that the duration of flow establishment with respect to the overall breakup time shapes the rear side profile of the drop. Thereby the ratio of the two times, expressed as the square root of the density ratio, appears to be an effective indicator of the deformation features.

关 键 词：Rear-Surface Deformation of a Water Drop in Aero-Breakup of Shear Mode 

分 类 号：O35[理学—流体力学]