激波作用下水膜变形和雾化实验研究

Study on Deformation and Atomization of Water Films Induced by Shock Wave

在激波与液滴作用研究的基础上,开展了激波作用下水膜的变形和雾化过程研究。通过阴影照相技术捕捉激波与水膜作用的典型照片,并以此分析其作用机理。通过改变激波强度观察水膜的变形和雾化情况。研究发现激波强度越大,水膜雾化后抛撒的距离越远,证明气动力在作用过程中起主导作用。使用PDPA系统对抛撒后水雾粒子的直径和速度进行测量,结果发现激波作用后初期,气动力仍起着主导作用。

On the basis of the investigation about the reaction between shock wave and liquid drops, experiments for the deformation and atomization of water films under the reaction of shock wave are carried out. Shadow photography technology is used to capture the typical photos of the reaction processes and the mechanism is analyzed. The intensity of shock wave is changed to observe the variation of the reaction processes. The results indicate that the higher the intensity of shock wave, the farther the dispersal distance, which proves that the aerodynamic force plays the leading part in the reaction processes. The diameter and velocities of water particles are measured by PDPA system, and the results indicate that the aerodynamic force also is the main force in the initial time period under the reaction of shock wave.