不同界面约束对爆炸作用下液体抛撒影响分析

采用高速摄影仪拍摄了不同界面约束条件液体抛撒的高速撮影图片,通过对这些图片的分析,得出了不同界面约束条件液体抛撒的最大速度、作用时间、半径、速度衰减系数以及液体抛撒的不对称性。依据不可压缩柱面流体界面运动、变化规律,在分析了爆炸作用下液体抛撒初期界面初始扰动运动、变化的基础上,探讨了不同界面约束对扰动放大因子及界面稳定的影响。根据液体二次破碎理论,分析了不同界面约束条件对液体二次破碎的影响;结合实验结果讨论了不同界面约束对液体抛撒的作用时间、半径以及速度衰减系数的影响。

AN ANALYSIS OF INFLUENCE OF DIFFERENT INTERFACE RESTRICTION ON LIQUID DISPERSAL BY BLASTING

With the help of high-speed CCD camera,photographs of liquid dispersal in different interface restrictions were obtained.Maximum velocity,periods,radius,velocity attenuation coefficient and non-symmetry of the liquid dispersal were obtained through analyzing these photographs.In the view of the movement and its nature of incompressible fluid interface, and based on the analysis of the movement of interface preliminary disturbance in the initial stages,the influence of different interface restrictions on disturbance factor and interface stability were analyzed.According to the theory of secondary breakup the influence of different interface restriction on liquid secondary breakup was discussed.Combining the experimental results with theoretical analysis,the influence of different interface restriction on periods,radius and velocity attenuation coefficient of the liquid dispersal was discussed.