摘要
实验研究了不同加速度下不相溶流体斜界面Rayleigh-Taylor(R-T)不稳定性诱导湍流混合区的发展特征。利用高速阴影测试技术研究了硅油/碘化钾溶液界面R-T不稳定性诱导界面的演化规律,定量分析了混合区发展宽度、界面倾角与时间的关系。通过实验结果分析得出:水平界面与斜界面混合区宽度演化的差别主要体现在后期,前、中期两者演化规律基本一致;界面倾角的演化呈现出两种不同的趋势,随时间先呈抛物线增长,随后线性增长,演化后期流体界面发生翻转;由R-T不稳定性诱导的界面混合与K-H不稳定性诱导的界面混合呈相互竞争的关系。
Institute of Physics,CAEP,Mianyang 621999,China)Abstract:In this research,we experimentally investigated the characteristics of the turbulent mixing zone induced by Rayleigh-Taylor(R-T)instability under different accelerations.We used the high-speed shadowgraph to study the evolution of the interface composed with the silicone oil/potassium iodide solution,and analyzed the width of the mixing zone and the obliquity of the interface quantitatively.According to the experimental results,the difference in the evolution of width between horizontal interface and oblique interface exhibits mainly in late stage,and the evolution law is basically same with that in the early and middle stages.There are two different trends in the evolution of the interfacial obliquity.The interfacial obliquity increases with time parabolicaly at first,and then increases linearly.As a result,the fluid interface turns over in the later stage of evolution.There is a competitive relationship between the turbulent mixing induced by R-T instability and K-H instability respectively.
作者
江荣宝
黄熙龙
邹立勇
施红辉
吴鋆
JIANG Rongbao;HUANG Xilong;ZOU Liyong;SHI Honghui;WU Jun(Faculty of Mechanical Engineering&Automation,Zhejiang Sci-Tech University, Hangzhou 310000,China;National Key Laboratory of Shock Wave and Detonation Physics, Institute of Physics,CAEP,Mianyang 621999,China)
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2018年第5期78-84,共7页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(11472253
11672277
11602247)
科学挑战专题(TZ2016001)
