Mode coupling between two different interfaces of a gas layer subject to a shock

doi:10.1017/jfm.2024.232

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Mode coupling between two different interfaces of a gas layer subject to a shock
	Chen, Chenren 2; Wang, He 2; Zhai, Zhigang 2; Luo, Xisheng 1,2
刊名	JOURNAL OF FLUID MECHANICS
	2024-04-03
卷号	984 页码:25
关键词	shock waves
ISSN号	0022-1120
DOI	10.1017/jfm.2024.232
通讯作者	Zhai, Zhigang(sanjing@ustc.edu.cn) ; Luo, Xisheng(xluo@ustc.edu.cn)
英文摘要	Shock-tube experiments and theoretical studies have been performed to highlight mode-coupling in an air-SF6-air fluid layer. Initially, the two interfaces of the layer are designed as single mode with different basic modes. It is found that as the two perturbed interfaces become closer, interface coupling induces a different mode from the basic mode on each interface. Then mode coupling further generates new modes. Based on the linear model (Jacobs et al., J. Fluid Mech., vol. 295, 1995, pp. 23-42), a modified model is established by considering the different accelerations of two interfaces and the waves' effects in the layer, and provides good predictions to the linear growth rates of the basic modes and the modes generated by interface coupling. It is observed that interface coupling behaves differently to the nonlinear growth of the basic modes, which can be characterized generally by the existing or modified nonlinear model. Moreover, a new modal model is established to quantify the mode-coupling effect in the layer. The mode-coupling effect on the amplitude growth is negligible for the basic modes, but is significant for the interface-coupling modes when the initial wavenumber of one interface is twice the wavenumber of the other interface. Finally, amplitude freeze-out of the second single-mode interface is achieved theoretically and experimentally through interface coupling. These findings may be helpful for designing the target in inertial confinement fusion to suppress the hydrodynamic instabilities.
资助项目	National Natural Science Foundation of China[12372281] ; National Natural Science Foundation of China[12022201] ; National Natural Science Foundation of China[12388101] ; National Natural Science Foundation of China[12102425] ; Youth Innovation Promotion Association CAS
WOS关键词	RICHTMYER-MESHKOV INSTABILITIES ; RAYLEIGH-TAYLOR ; HYDRODYNAMIC INSTABILITIES ; NONLINEAR EVOLUTION ; DRIVEN ; GROWTH
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001196063900001
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94863]
专题	力学研究所_高温气体动力学国家重点实验室
通讯作者	Zhai, Zhigang; Luo, Xisheng
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 2.Univ Sci & Technol China, Dept Modern Mech, Adv Prop Lab, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Chen, Chenren,Wang, He,Zhai, Zhigang,et al. Mode coupling between two different interfaces of a gas layer subject to a shock[J]. JOURNAL OF FLUID MECHANICS,2024,984:25.
APA	Chen, Chenren,Wang, He,Zhai, Zhigang,&Luo, Xisheng.(2024).Mode coupling between two different interfaces of a gas layer subject to a shock.JOURNAL OF FLUID MECHANICS,984,25.
MLA	Chen, Chenren,et al."Mode coupling between two different interfaces of a gas layer subject to a shock".JOURNAL OF FLUID MECHANICS 984(2024):25.