Experimental and numerical investigation of inclined air/SF_6 interface instability under shock wave  

作　　者：Tao WANG Jin-hong LIU Jing-song BAI Yang JIANG Ping LI Kun LIU 王涛;刘金宏;柏劲松;姜洋;李平;刘坤(Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,Sichuang Province,P.R.China)

机构地区：[1]Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,Sichuang Province,P.R.China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2012年第1期37-50,共14页应用数学和力学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 11072228 and 11002129)

摘　　要：The shock tube experiments of inclined air/SF6 interface instability under the shock wave with the Mach numbers 1.23 and 1.41 are conducted. The numerical simulation is done with the parallel algorithm and the multi-viscous-fluid and turbulence （MVFT） code of the large-eddy simulation （LES）. The developing process of the interface accelerated by the shock wave is reproduced by the simulations. The complex wave structures, e.g., the propagation, refraction, and reflection of the shock wave, are clearly revealed in the flows. The simulated evolving images of the interface are consistent with the experimental ones. The simulated width of the turbulent mixing zone （TMZ） and the displacements of the bubble and the spike also agree well with the experimental data. Also, the reliability and effectiveness of the MVFT in simulating the problem of interface instability are validated. The more energies are injected into the TMZ when the shock wave has a larger Mach number. Therefore, the perturbed interface develops faster.The shock tube experiments of inclined air/SF6 interface instability under the shock wave with the Mach numbers 1.23 and 1.41 are conducted. The numerical simulation is done with the parallel algorithm and the multi-viscous-fluid and turbulence （MVFT） code of the large-eddy simulation （LES）. The developing process of the interface accelerated by the shock wave is reproduced by the simulations. The complex wave structures, e.g., the propagation, refraction, and reflection of the shock wave, are clearly revealed in the flows. The simulated evolving images of the interface are consistent with the experimental ones. The simulated width of the turbulent mixing zone （TMZ） and the displacements of the bubble and the spike also agree well with the experimental data. Also, the reliability and effectiveness of the MVFT in simulating the problem of interface instability are validated. The more energies are injected into the TMZ when the shock wave has a larger Mach number. Therefore, the perturbed interface develops faster.

关 键 词：interface instability multi-viscous-fluid and turbulence （MVFT） largeeddy simulation （LES） turbulent mixing zone （TMZ） VALIDATION 

分 类 号：O357.5[理学—流体力学] O347.5[理学—力学]