| 刘起立,司廷*,翟志刚,罗喜胜,杨基明.流动肥皂膜气体界面及其在柱状汇聚激波作用下演化的实验研究[J].实验力学,2011,26(2):132~138 |
| 流动肥皂膜气体界面及其在柱状汇聚激波作用下演化的实验研究 |
| Experimental Investigation on Flowing Soap Film Gaseous Interface and its Evolution Accelerated by a Cylindrical Converging Shock Wave |
| 投稿时间：2011-01-05 修订日期：2011-02-18 |
| DOI： |
| 中文关键词: Richtmyer-Meshkov不稳定性 流动肥皂膜 气体界面 柱状汇聚激波 高速纹影法 |
| 英文关键词:Richtmyer-Meshkov instability flowing soap film gaseous interface cylindrical converging shock wave high-speed schlieren photography |
| 基金项目:国家自然科学基金(Nos. 10972214, NSAF10776031)和中央高校基本科研业务费专项资金资助项目 |
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| 中文摘要: |
| 在Richtmyer-Meshkov (RM)不稳定性实验研究中,形成两种不同密度流体的初始扰动界面是前提和关键。本文提出了一种流动肥皂膜气体界面生成方法,其工作原理是由细丝构成的导流框从激波管实验段穿过,肥皂液从导流框的上端注入并在重力作用下在导流框中形成流动肥皂膜,膜的两侧可以分别充入不同密度的气体从而形成稳定的气体界面。改变导流框的结构可以得到多种界面形状,包括平面、柱形、分段光滑、弯曲和多层结构等。结果表明,该界面厚度小,易于形成特定的形状,与激波管实验段相匹配,而且维持时间足够长。本文利用流动肥皂膜气体界面生成方法开展了一种竖直界面在柱状汇聚激波冲击下演化的实验研究,通过高速纹影法获得了柱状汇聚激波的形状变化,得到了竖直SF6/空气界面RM不稳定性演化的整个过程。 |
| 英文摘要: |
| In the study of Richtmyer-Meshkov (RM) instability experiment, the formation of initial perturbation on the interface between two fluids with different densities is an essential precondition and key problem. A flowing soap film method for generating gaseous interface is proposed in this paper, in which a guiding frame made up of filaments passes through the shock tube test section. Soap liquid moves from the top of guiding frame due to the gravitation and forms a flowing soap film within the guiding frame. If on the both sides of film are filled with different gases, then a steady gaseous interface is formed. According to different configurations of guiding frame, various shapes of interface can be obtained, including planar, prismy, piecewise smooth, curved and multilayer structures. Results indicate that the flowing soap film interface is thin, easy to form specified shapes, able to match the shock tube test section and to maintain enough long time. Interaction of a cylindrical converging shock wave with a vertical interface was investigated experimentally. The shape change of cylindrical converging shock wave and the development process of RM instability of vertical SF6/air interface were observed based on high-speed schlieren photography. |
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