Shock wave focusing in water inside convergent structures
Shock wave focusing in water inside convergent structures
复制标题
冲击波在会聚结构内的水中聚焦
DOI：
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
V. Eliasson
中科院分区：
文献类型：
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作者：
Chuanxi Wang;V. Eliasson
进行了充水收敛结构中激波聚焦的实验研究。水中的冲击波是通过从气枪发射的弹丸撞击充满水的收敛结构而产生的。已经测试了两种结构：散装材料和薄壳结构。会聚结构的几何形状由对数螺线给出，之所以选择这种特殊形状，是因为它最大化了到达焦点区域的能量。高速纹影摄影被用来显示聚焦事件期间的冲击动力学。结果表明，薄壳结构与水中冲击波之间的流固耦合作用不同于散体结构，薄壳内部冲击波的多次反射被反射回水中，从而形成了波列，这是在散体材料中没有观察到的激波聚焦。
Experiments on shock focusing in water-filled convergent structures have been performed. A shock wave in water is generated by means of a projectile, launched from a gas gun, which impacts a water-filled convergent structure. Two types of structures have been tested; a bulk material and a thin shell structure. The geometric shape of the convergent structures is given by a logarithmic spiral, and this particular shape is chosen because it maximizes the amount of energy reaching the focal region. High-speed schlieren photography is used to visualize the shock dynamics during the focusing event. Results show that the fluid-structure interaction between the thin shell structure and the shock wave in the water is different from that of a bulk structure; multiple reflections of the shock wave inside the thin shell are reflected back into the water, thus creating a wave train, which is not observed for shock focusing in a bulk material.
影响因子：
2.4
作者：
Johnsen, Eric;Colonius, Tim
通讯作者：
Colonius, Tim