A quasi-one-dimensional model for hypersonic reactive flow along the stagnation streamline

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	A quasi-one-dimensional model for hypersonic reactive flow along the stagnation streamline
	Chen S; Sun QH(孙泉华); Sun QH(孙泉华)
刊名	CHINESE JOURNAL OF AERONAUTICS
	2016
通讯作者邮箱	chensong212@hotmail.com ; qsun@imech.ac.cn
卷号	29 期号:6 页码:1517-1526
ISSN号	1000-9361
通讯作者	Sun, QH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
产权排序	[Chen Song; Sun Quanhua] Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; [Sun Quanhua] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
中文摘要	This study proposes a quasi-one-dimensional model to predict the chemical nonequilibrium flow along the stagnation streamline of hypersonic flow past a blunt body. The model solves reduced equations along the stagnation streamline and predicts nearly identical results as the numerical solution of the full-field Navier-Stokes equations. The high efficiency of this model makes it useful to investigate the overall quantitative behavior of related physical-chemical phenomena. In this paper two important properties of hypersonic flow, shock stand-off distance and oxygen dissociation, are studied using the quasi-one-dimensional model with the ideal dissociating gas model. It is found that the shock stand-off distance is affected by both chemical and thermal non-equilibrium. The shock stand-off distance will increase when the flow conditions are changed from equilibrium to non-equilibrium, because the average density of the shock-compressed gas will decrease as a result of the increase in translational energy. For oxygen dissociation, the maximum value of its dissociation degree along the stagnation line varies with the flight altitude. It is increased at first and decreased thereafter with the altitude, which is due to the combination effect of the equilibrium shift and chemical non-equilibrium relaxation. The overall variation of the maximum dissociation is then plotted in the speed and altitude coordinates as a reference for engineering application. (C) 2016 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd.
分类号	二类
类目[WOS]	Engineering, Aerospace
研究领域[WOS]	Engineering
关键词[WOS]	Quasi-one-dimensional model ; Hypersonic ; Non-equilibrium ; Stagnation flow ; Shock stand-off distance
收录类别	SCI ; EI ; CSCD
原文出处	http://dx.doi.org/10.1016/j.cja.2016.09.004
语种	英语
WOS记录号	WOS:000393113300006
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/60087]
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	Chen S,Sun QH,Sun QH. A quasi-one-dimensional model for hypersonic reactive flow along the stagnation streamline[J]. CHINESE JOURNAL OF AERONAUTICS,2016,29(6):1517-1526.
APA	Chen S,孙泉华,&Sun QH.(2016).A quasi-one-dimensional model for hypersonic reactive flow along the stagnation streamline.CHINESE JOURNAL OF AERONAUTICS,29(6),1517-1526.
MLA	Chen S,et al."A quasi-one-dimensional model for hypersonic reactive flow along the stagnation streamline".CHINESE JOURNAL OF AERONAUTICS 29.6(2016):1517-1526.