Convergent Richtmyer-Meshkov instability on two-dimensional tri-mode interfaces

作     者：Zhigang Zhai Jinru Xu Xisheng Luo 

作者机构：Advanced Propulsion LaboratoryDepartment of Modern MechanicsUniversity of Science and Technology of ChinaHefei230026China State Key Laboratory of High Temperature Gas DynamicsInstitute of MechanicsChinese Academy of SciencesBeijing100190China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2024年第67卷第12期

页      面：106-118页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.12372281 and 12388101) the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No.XDB0620201) Youth Innovation Promotion Association CAS 

主　　题：convergent shock wave tri-mode interface mode-coupling 

摘      要：Interfacial fluid mixing driven by a shock wave is a common phenomenon that occurs frequently in basic science research and in a variety of *** this work,shock-tube experiments on the developments of two-dimensional tri-mode interfaces accelerated by a convergent shock wave are *** sets of different combinations in the value of phase and that of amplitude in a tri-mode perturbed interface are studied to evaluate the effect of mode coupling on the amplitude growths of the basic *** qualitative results show that the phase combination obviously affects the interface morphologies and flow *** alternation of each mode amplitude does not affect the major flow features,such as the number and arrangement of the bubbles and spikes,but affects the local interface *** upon the phase combination,the mode amplitude growth is either promoted or suppressed by mode coupling relative to the single-mode *** considering the feedbacks from both the first-order and second-order mode couplings,the mode amplitude growth can be qualitatively *** to dual-mode interface,mode coupling occurs earlier in tri-mode *** the sets of parameters we studied,the effect of initial phase on the amplitude growth is greater and occurs earlier for the mode with low mode *** addition,the amplitude development of mode with high mode number is more affected by initial amplitudes of basic modes than that of mode with low mode *** introduction of the third mode affects the amplitude growths of original two modes,but has little effect on the final mixing width ***,a theoretical model is proposed to predict the amplitude growth of each basic mode.