Self-similar unstart characteristics of supersonic contraction duct with an expansion corner

doi:10.1063/5.0180243

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

	Self-similar unstart characteristics of supersonic contraction duct with an expansion corner
	Tong XT(仝晓通); Yue LJ(岳连捷); Wu WN(邬婉楠); Zhang QF(张启帆); Chen H(陈昊)
刊名	PHYSICS OF FLUIDS
	2024
卷号	36 期号:1 页码:20
ISSN号	1070-6631
DOI	10.1063/5.0180243
通讯作者	Yue, Lian-Jie(yuelj@imech.ac.cn) ; Chen, Hao(chenhao@imech.ac.cn)
英文摘要	Inlet unstart is detrimental to hypersonic airbreathing flights. By unstart, we mean the separation-induced collapse of a supersonic duct flow. The unstart characteristics of a two-dimensional contraction duct with an expansion corner are numerically investigated to develop a universal prediction method and to determine the unstart mechanism. The unstart boundaries under varying contraction angles, entrance heights, and Reynolds numbers are obtained by translating the cowl plate. A self-similar empirical equation of unstart boundary that unifies multiple variables is proposed through similarity analysis. To estimate the unstart boundaries of large-angle ducts, the alternative area ratio is presented. Three types of unstarts are identified according to the distribution of the unstart boundaries and the evolution mechanism of separation region: the long-cowl, transitional, and short-cowl unstart. The long-cowl unstart stems from the mass flow limit at the throat, while the other two unstarts stem from the separation region growth. The wall pressure criteria for unstart are correlated with the dimensionless cowl length and the characteristic separation scale in the critical state to facilitate unstart detection. Moreover, the self-similar compression intensity is proposed to characterize the maximum pressure increase induced by the unit effective area contraction in the started state.
分类号	一类/力学重要期刊
资助项目	National Natural Science Foundation of China10.13039/501100010903[U2141220] ; National Natural Science Foundation of China10.13039/501100010903[11902325] ; National Natural Science Foundation of China10.13039/501100010903[12102440] ; National Natural Science Foundation of China
WOS关键词	SHOCK/BOUNDARY-LAYER INTERACTION ; HYPERSONIC INLET ; SHOCK TRAIN ; COMPRESSION ; WAVES
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001153154900007
资助机构	National Natural Science Foundation of China10.13039/501100010903 ; National Natural Science Foundation of China
其他责任者	Yue, Lian-Jie ; Chen, Hao
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94360]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Tong XT,Yue LJ,Wu WN,et al. Self-similar unstart characteristics of supersonic contraction duct with an expansion corner[J]. PHYSICS OF FLUIDS,2024,36(1):20.
APA	仝晓通,岳连捷,邬婉楠,张启帆,&陈昊.(2024).Self-similar unstart characteristics of supersonic contraction duct with an expansion corner.PHYSICS OF FLUIDS,36(1),20.
MLA	仝晓通,et al."Self-similar unstart characteristics of supersonic contraction duct with an expansion corner".PHYSICS OF FLUIDS 36.1(2024):20.