A membraneless experiment for the study of Richtmyer–Meshkov instability of a shock-accelerated gas interface
A membraneless experiment for the study of Richtmyer–Meshkov instability of a shock-accelerated gas interface
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DOI：
10.1063/1.869416
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发表时间：
1997-10
影响因子：
4.6
通讯作者：
M. A. Jones;J. Jacobs
中科院分区：
文献类型：
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作者：
M. A. Jones;J. Jacobs
以前在激波管中进行的Richtmyer-Meshkov不稳定性实验由于需要用一层薄塑料薄膜分离这两种气体而受到阻碍。因此，这些实验中的许多与Richtmyer的线性稳定性理论的一致性很差。纯苹果。数学课。23,297(1960)]。在目前的研究中，通过使用一种新的技术来消除这一限制，其中界面是由来自垂直激波管两端的流动的轻(N_2)和重(SF_6)气体形成的。这两种气体都通过测试段壁上的狭缝离开激波管，留下一个平坦的静止界面，然后通过以规定的频率在水平方向上轻轻振动激波管来赋予该界面一个正弦的初始形状。激波管中产生的弱激波(ms=1.10)冲击界面，产生不稳定。界面的照片，这是可视化的种子重气体与水滴雾和照明它…
Previous Richtmyer–Meshkov instability experiments carried out in shock tubes have been hampered by the need to separate the two gases with a thin plastic membrane. As a result, many of these experiments have had poor agreement with the linear stability theory of Richtmyer [Commun. Pure Appl. Math. 23, 297 (1960)]. This limitation has been removed in the present investigation by the use of a novel technique in which the interface is formed by flowing light (N2) and heavy (SF6) gases from opposite ends of a vertical shock tube. Both gases exit the shock tube through slots in the test section walls leaving behind a flat motionless interface which is then given a sinusoidal initial shape by gently oscillating the shock tube at a prescribed frequency in the horizontal direction. A weak shock wave (Ms=1.10), generated in the shock tube, impacts the interface and produces the instability. Photographs of the interface, which is visualized by seeding the heavy gas with a water droplet fog and illuminating it with...