Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/88402
Title: | Hypersonic flow over spherically blunted double cones | Authors: | Hao, J Wen, CY |
Issue Date: | 2020 | Source: | Journal of fluid mechanics, 10 Aug. 2020, v. 896, A26, p. A26-1-A26-21 | Abstract: | A hypersonic shock wave/laminar boundary-layer interaction over a canonical double-cone configuration is numerically investigated. A moderate-enthalpy flow of with a Mach number of 9.87 and a unit Reynolds number of is considered. Special emphasis is given to the influence of leading-edge bluntness. The results indicate that the double-cone flow is insensitive to small bluntness in terms of shock structures, separation region sizes and surface pressure and heat flux distributions. A critical nose radius is observed, beyond which the separation bubble grows dramatically. The numerical data are analysed and interpreted based on a triple-deck formulation. It is shown that the sudden change in flow features is mainly caused by pressure overexpansion on the first cone due to leading-edge bluntness, such that the skin friction upstream of the separation is significantly reduced and the upstream pressure can no longer resist the large adverse pressure gradient induced by shock impingement. An estimation of the critical radius is established based on the pressure correlations of Blick & Francis (AIAA J., vol. 4 (3), 1966, pp. 547-549) for spherically blunted cones. Simulations at a higher enthalpy with the presence of both vibrational relaxation and air chemistry show a similar trend with increasing nose radius. The proposed criterion agrees well with the experimental observations. | Keywords: | Boundary layer separation High-speed flow Shock waves |
Publisher: | Cambridge University Press | Journal: | Journal of fluid mechanics | ISSN: | 0022-1120 | EISSN: | 1469-7645 | DOI: | 10.1017/jfm.2020.331 | Rights: | This article has been published in a revised form in Journal of Fluid Mechanics https://dx.doi.org/10.1017/jfm.2020.331. This version is free to view and download for private research and study only. Not for re-distribution or re-use. © The Author(s), 2020. When citing an Accepted Manuscript or an earlier version of an article, the Cambridge University Press requests that readers also cite the Version of Record with a DOI link. The article is subsequently published in revised form in Journal of Fluid Mechanics https://dx.doi.org/10.1017/jfm.2020.331. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Hypersonic_flow_over_spherically_blunted_double_cones.pdf | Pre-Published_version | 1.59 MB | Adobe PDF | View/Open |
Page views
124
Last Week
0
0
Last month
Citations as of Oct 13, 2024
Downloads
132
Citations as of Oct 13, 2024
SCOPUSTM
Citations
28
Citations as of Oct 17, 2024
WEB OF SCIENCETM
Citations
26
Citations as of Oct 10, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.