激波与SF_6球形气泡相互作用的数值研究

Numerical investigations on the interaction of shock waves with spherical SF_6 bubbles

本文基于大涡模拟方法,采用高阶精度格式对平面入射激波以及不同反射距离条件下的反射激波与SF6重气泡相互作用过程进行了三维数值模拟.数值结果清晰地显示了SF6重气泡在激波作用下诱导Richtmyer-Meshkov不稳定性过程,揭示了入射激波以及反射激波在气泡界面聚焦诱导射流的过程,详细分析了不同反射距离条件下反射激波与SF6重气泡作用过程及流场结构.

Based on the simulation of large eddy current, combined with the high-precision computational scheme, the study of planar shock wave and reflected shock waves at different reflected distances, which interact with spherical SF6 bubbles, is carried out numerically in 3D. Our numerical results show clearly the deformation of spherical interface that is induced by the Richtmyer-Meshkov instability due to the collision of shock wave. Jets induced by incident shock wave and reflected shock waves are revealed, and the flow field of the interactions between the reflected shock waves at different reflected distances and the SF6 bubbles is also discussed in detail.