Evolution of weakly unstable oblique detonation in disturbed inflow

doi:10.1063/5.0184971

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

	Evolution of weakly unstable oblique detonation in disturbed inflow
	Niu, Shuzhen 1; Yang PF(杨鹏飞)2; Xi, Xuechen 1,3; Li, Zhenzhen 1; Teng, Honghui 1,4
刊名	PHYSICS OF FLUIDS
	2024
卷号	36 期号:1 页码:12
ISSN号	1070-6631
DOI	10.1063/5.0184971
通讯作者	Li, Zhenzhen(zhenzhenli@bit.edu.cn) ; Teng, Honghui(hhteng@bit.edu.cn)
英文摘要	The surface instability of oblique detonation waves (ODWs) without perturbations has been extensively investigated, yet the impact of external perturbations remains under-explored. Utilizing reactive Euler equations coupled with a two-step induction-exothermic reaction model, this study conducts a numerical examination of the evolution of unstable ODW surfaces subjected to a continuous sinusoidal density/temperature perturbation inflow. The results show that, without inflow perturbations, the ODW can evolve into triple points in the downstream due to detonation instability, similar to previous work. However, a small continuous perturbation can induce a significant forward movement of the ODW unstable position. Surprisingly, as the perturbation magnitude increases, the changes in the unstable position become progressively less pronounced. By increasing the perturbation frequency, the oscillation amplitude first increases, but a decreasing period/stage occurs with a modest frequency. To investigate the response of ODW to the increase in perturbation, the frequency characteristics and numerical smoked cells of detonation surfaces are examined and analyzed using Fast Fourier Transformation. The power spectral density indicates the presence of two distinct oscillation modes within oblique detonation. Low-frequency, small-amplitude perturbations serve to amplify the instability of the detonation, and more irregular oscillations could be observed. Conversely, high-frequency, large-amplitude perturbations suppress the development of small-scale waves on the detonation wavefront and lead to a relative regular oscillation, indicating that the wavefront pressure oscillations are entirely determined by inflow perturbations and become predictable. These findings have significant implications for the control of intrinsically unstable ODWs, providing valuable insights into the regulation of ODW dynamics.
分类号	一类/力学重要期刊
WOS关键词	NUMERICAL-SIMULATION ; CELLULAR STRUCTURE ; WAVES ; WEDGE ; PROPAGATION ; INSTABILITY ; MECHANISMS ; INITIATION ; STEADY
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001138760800016
其他责任者	Li, Zhenzhen ; Teng, Honghui
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94646]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 3.Shanxi Police Coll, Dept Publ Secur, Taiyuan 030401, Shanxi, Peoples R China; 4.Aero Engine Acad China, Adv Jet Prop Innovat Ctr, Beijing 101300, Peoples R China
推荐引用方式 GB/T 7714	Niu, Shuzhen,Yang PF,Xi, Xuechen,et al. Evolution of weakly unstable oblique detonation in disturbed inflow[J]. PHYSICS OF FLUIDS,2024,36(1):12.
APA	Niu, Shuzhen,杨鹏飞,Xi, Xuechen,Li, Zhenzhen,&Teng, Honghui.(2024).Evolution of weakly unstable oblique detonation in disturbed inflow.PHYSICS OF FLUIDS,36(1),12.
MLA	Niu, Shuzhen,et al."Evolution of weakly unstable oblique detonation in disturbed inflow".PHYSICS OF FLUIDS 36.1(2024):12.