Similarity Analysis on Two-Dimensional Hypersonic Inlets Unstart

doi:10.2514/1.J061874

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

	Similarity Analysis on Two-Dimensional Hypersonic Inlets Unstart
	Tong, Xiao-Tong 1,3; Yue, Lian-jie 1,3; Chen, Hao 2; Zhang, Qi-Fan 1,2; He, Cheng-Ming 2
刊名	AIAA JOURNAL
	2022-10-28
页码	18
ISSN号	0001-1452
DOI	10.2514/1.J061874
通讯作者	Yue, Lian-jie(yuelj@imech.ac.cn)
英文摘要	The prediction of unstart boundaries of hypersonic inlets is significant to the engine control. To correct the previous conclusions based on the one-dimensional and inviscid flow assumption, the present paper numerically investigates the unstart characteristics of two-dimensional contraction ducts in viscous flow that vary with multiple controlling variables. Based on the newly defined dimensionless cowl length and effective internal contraction ratio, the similarity law of unstart is discovered. The universal empirical equation of unstart boundary for different cowl lengths, cowl lip heights, entrance boundary-layer thicknesses, unit Reynolds numbers, and Mach numbers is proposed, which can simplify the design of two-dimensional hypersonic inlets. With varying the dimensionless cowl length, three different types of short-cowl, transitional, and long-cowl unstarts are identified, owing to the different evolution mechanisms of separation region. The unstart displays a separation region growing under the streamwise pressure difference enhanced by the shock system or flow choke. In addition, the wall pressure criteria for unstart are correlated to the characteristic separation scale at unstart critical state and the dimensionless cowl length, which facilitates the unstart detection or early warning. It is observed that the Kantrowitz limit is close to the unstart boundaries for very short cowl and the isentropic limit is close to the unstart boundaries for very long cowl.
资助项目	National Natural Science Foundation of China ; [U2141220] ; [11672309] ; [11902325] ; [12102440]
WOS关键词	SUPERSONIC INLET ; SHOCK ; CRITERIA ; CLASSIFICATION ; START/UNSTART ; MECHANISM ; GEOMETRY
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000878101800001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90633]
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	Yue, Lian-jie
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 2.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Tong, Xiao-Tong,Yue, Lian-jie,Chen, Hao,et al. Similarity Analysis on Two-Dimensional Hypersonic Inlets Unstart[J]. AIAA JOURNAL,2022:18.
APA	Tong, Xiao-Tong,Yue, Lian-jie,Chen, Hao,Zhang, Qi-Fan,&He, Cheng-Ming.(2022).Similarity Analysis on Two-Dimensional Hypersonic Inlets Unstart.AIAA JOURNAL,18.
MLA	Tong, Xiao-Tong,et al."Similarity Analysis on Two-Dimensional Hypersonic Inlets Unstart".AIAA JOURNAL (2022):18.