A cylindrical converging shock tube for shock-interface studies.
A cylindrical converging shock tube for shock-interface studies.
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DOI：
10.1063/1.4861357
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发表时间：
2014-01
期刊：
影响因子：
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通讯作者：
Xisheng Luo;T. Si;Jiming Yang;Z. Zhai
中科院分区：
文献类型：
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作者：
Xisheng Luo;T. Si;Jiming Yang;Z. Zhai
本文介绍了一种用于产生圆柱形会聚激波的激波管装置。根据激波动力学理论，设计了一种特殊的激波管试验段壁面形状，使平面激波转化为圆柱激波。实验得到的收敛段激波阵面呈现完美的圆形，证明了该方法的可行性和可靠性。数值模拟、实验和理论估算得到的激波强度随时间的变化表明，激波管试验段的收敛效果较好。特别强调的是，然后放在激波界面相互作用引起的圆柱形会聚激波的问题。为此，采用无膜气缸来形成两种不同流体之间的界面，并采用激光片技术来显示流场。结果表明，在该装置上进行此类实验是方便的。
A shock tube facility for generating a cylindrical converging shock wave is developed in this work. Based on the shock dynamics theory, a specific wall profile is designed for the test section of the shock tube to transfer a planar shock into a cylindrical one. The shock front in the converging part obtained from experiment presents a perfect circular shape, which proves the feasibility and reliability of the method. The time variations of the shock strength obtained from numerical simulation, experiment, and theoretical estimation show the desired converging effect in the shock tube test section. Particular emphasis is then placed on the problem of shock-interface interaction induced by cylindrical converging shock waves. For this purpose, membrane-less gas cylinder is adopted to form the interface between two different fluids while the laser sheet technique to visualize the flow field. The result shows that it is convenient to perform such experiments in this facility.