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

文献类型：期刊论文

作者Tong, Xiao-Tong1,2; Yue, Lian-Jie1,2; Wu, Wan-Nan2; Zhang, Qi-Fan2; Chen, Hao2; Yue LJ(岳连捷); Tong XT(仝晓通); Zhang QF(张启帆); Chen H(陈昊)
刊名PHYSICS OF FLUIDS
出版日期2024
卷号36期号:1页码:20
ISSN号1070-6631
DOI10.1063/5.0180243
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.
WOS关键词SHOCK/BOUNDARY-LAYER INTERACTION ; HYPERSONIC INLET ; SHOCK TRAIN ; COMPRESSION ; WAVES
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
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
通讯作者Yue, Lian-Jie; Chen, Hao
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Tong, Xiao-Tong,Yue, Lian-Jie,Wu, Wan-Nan,et al. Self-similar unstart characteristics of supersonic contraction duct with an expansion corner[J]. PHYSICS OF FLUIDS,2024,36(1):20.
APA Tong, Xiao-Tong.,Yue, Lian-Jie.,Wu, Wan-Nan.,Zhang, Qi-Fan.,Chen, Hao.,...&陈昊.(2024).Self-similar unstart characteristics of supersonic contraction duct with an expansion corner.PHYSICS OF FLUIDS,36(1),20.
MLA Tong, Xiao-Tong,et al."Self-similar unstart characteristics of supersonic contraction duct with an expansion corner".PHYSICS OF FLUIDS 36.1(2024):20.

入库方式： OAI收割

来源：力学研究所

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