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A quasi-one-dimensional model for hypersonic reactive flow along the stagnation streamline
Chen S; Sun QH(孙泉华)

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.

Indexed BySCI ; EI ; CSCD
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).
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding AuthorSun QH(孙泉华)
Recommended Citation
GB/T 7714
Chen S,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,&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.
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