Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/93029
DC Field | Value | Language |
---|---|---|
dc.contributor | Department of Mechanical Engineering | en_US |
dc.contributor | Department of Aeronautical and Aviation Engineering | en_US |
dc.creator | Tian, X | en_US |
dc.creator | Wen, C | en_US |
dc.date.accessioned | 2022-05-30T07:40:11Z | - |
dc.date.available | 2022-05-30T07:40:11Z | - |
dc.identifier.issn | 0022-1120 | en_US |
dc.identifier.uri | http://hdl.handle.net/10397/93029 | - |
dc.language.iso | en | en_US |
dc.publisher | Cambridge University Press | en_US |
dc.rights | This article has been published in a revised form in Journal of Fluid Mechanics [http://doi.org/10.1017/jfm.2020.981]. 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. | en_US |
dc.rights | 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 [http://doi.org/10.1017/jfm.2020.981]. | en_US |
dc.subject | Boundary layer control | en_US |
dc.subject | Boundary layer stability | en_US |
dc.subject | Transition to turbulence | en_US |
dc.title | Growth mechanisms of second-mode instability in hypersonic boundary layers | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.volume | 908 | en_US |
dc.identifier.doi | 10.1017/jfm.2020.981 | en_US |
dcterms.abstract | Stability analyses based on the rates of change of perturbations were performed to study the growth mechanisms of second-mode instability in hypersonic boundary layers. The results show that the streamwise velocity perturbation is strengthened by the concurrence of the momentum transfer due to the wall-normal velocity fluctuation and the streamwise gradient of the pressure perturbation near the wall, while the wall-normal velocity perturbation is dominated by the wall-normal gradient of the pressure perturbation. Meanwhile, the change of fluctuating internal energy is sustained by the advection of perturbed thermal energy in the vicinity of the critical layer and by the dilatation fluctuation near the wall. The energy transport by the wall-normal velocity fluctuation accounts for the growth of second-mode instability, and the growth rate depends on the relative phase of the energy transport by the wall-normal velocity fluctuation to the total time rate of change of fluctuating internal energy in the vicinity of the critical layer. Moreover, this relative phase is associated with the mutual interaction between the critical-layer fluctuation and the near-wall fluctuation. Porous walls recast this mutual interaction by delaying the phase of the wall-normal energy transport near the wall, resulting in the stabilization of the second mode. | en_US |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | Journal of fluid mechanics, 10 Feb. 2021, v. 908, R4 | en_US |
dcterms.isPartOf | Journal of fluid mechanics | en_US |
dcterms.issued | 2021-02-10 | - |
dc.identifier.scopus | 2-s2.0-85097878973 | - |
dc.identifier.eissn | 1469-7645 | en_US |
dc.identifier.artn | R4 | en_US |
dc.description.validate | 202205 bchy | en_US |
dc.description.oa | Accepted Manuscript | en_US |
dc.identifier.FolderNumber | ME-0336 | - |
dc.description.fundingSource | RGC | en_US |
dc.description.fundingSource | Others | en_US |
dc.description.fundingText | Natural Science Foundation of China | en_US |
dc.description.pubStatus | Published | en_US |
dc.identifier.OPUS | 43059218 | - |
dc.description.oaCategory | Green (AAM) | en_US |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
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Tian_Growth_Mechanisms_Second-Mod.pdf | Pre-Published version | 1.58 MB | Adobe PDF | View/Open |
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