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A quasi-one-dimensional model for hypersonic reactive flow along the stagnation streamline
Chen Song; Sun QH(孙泉华); Sun, QH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Source PublicationCHINESE JOURNAL OF AERONAUTICS
2016
Volume29Issue:6Pages:1517-1526
ISSN1000-9361
Abstract

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.

DOI10.1016/j.cja.2016.09.004
URL查看原文
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000393113300006
WOS KeywordQuasi-one-dimensional model ; Hypersonic ; Non-equilibrium ; Stagnation flow ; Shock stand-off distance
WOS Research AreaEngineering
WOS SubjectEngineering, Aerospace
Funding OrganizationThis work was supported by the National Natural Science Foundation of China (Nos. 1372325 and 91116013).
CSCD IDCSCD:5884786
DepartmentLHD微尺度和非平衡流动
Classification二类
RankingTrue
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60087
Collection高温气体动力学国家重点实验室
Corresponding AuthorSun, QH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Chen Song,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 Song,Sun QH,&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 Song,et al."A quasi-one-dimensional model for hypersonic reactive flow along the stagnation streamline".CHINESE JOURNAL OF AERONAUTICS 29.6(2016):1517-1526.
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