【摘要】 利用高速摄影机直接观测了激波加载下球形气泡的演化过程。采用白色的烟雾颗粒对气泡内透明的测试气体进行染色,直接观察到了气泡界面。通过对平面弱激波加载下轻气体气泡和重气体气泡进行研究,成功验证了轻气体气泡和重气体气泡演化过程中出现的典型界面结构,获得了弱激波加载轻气体气泡中背风涡环的环状几何结构。运用相关方法分析了轻气体气泡实验初期的流场分布,得到的结果与理论分析结果吻合得很好,对于此类实验的数据处理具有一定的启发意义。同时,实验中使用的烟雾颗粒法为今后在球形气泡实验中引入更为精确的平面激光诱导荧光技术(PLIF)、激光粒子图像测速技术(PIV)等实验测试系统提供了布撒示踪粒子的范例。更多还原

【Abstract】 The interaction of a shock wave with a spherical gaseous interface(soap bubble) was observed directly by a high-speed camera.To trace the picture of the interface,white droplets were used to dye the test gas inside the bubble.Light gas bubble and heavy gas bubble under weak planar shock waves loading were studied.The geometrical characteristics of bubble evolution were obtained,and the ring-shaped structure in the light gas bubble was observed for the first time.We also analyzed the distribution of the displacement for the light gas bubble with the correlation method.The results agree quite well with the theoretical analysis.The successful usage of droplets encourages the introduction of more accurate diagnostic system like planar laser induced fluorescence(PLIF) or particle image velocimetry(PIV) into experiments in the future.更多还原