Show simple item record

dc.contributor.authorWagner, Alexander
dc.contributor.authorSchülein, Erich
dc.contributor.authorPetervari, René
dc.contributor.authorHannemann, Klaus
dc.contributor.authorAli, Syed RC
dc.contributor.authorCerminara, Adriano
dc.contributor.authorSandham, Neil D
dc.date.accessioned2019-11-26T12:54:44Z
dc.date.available2019-11-26T12:54:44Z
dc.date.issued2018-03-13
dc.identifier.citationWagner, A., Schülein, E., Petervari , R. and Hannemann, K. (2018) Combined free-stream disturbance measurements and receptivity studies in hypersonic wind tunnels by means of a slender wedge probe and direct numerical simulation, Journal of Fluid Mechanics, 842, pp. 495-531.
dc.identifier.issn0022-1120en
dc.identifier.doi10.1017/jfm.2018.132en
dc.identifier.urihttp://hdl.handle.net/2436/622939
dc.description.abstractCombined free-stream disturbance measurements and receptivity studies in hypersonic wind tunnels were conducted by means of a slender wedge probe and direct numerical simulation. The study comprises comparative tunnel noise measurements at Mach 3, 6 and 7.4 in two Ludwieg tube facilities and a shock tunnel. Surface pressure fluctuations were measured over a wide range of frequencies and test conditions including harsh test environments not accessible to measurement techniques such as Pitot probes and hot-wire anemometry. A good agreement was found between normalized Pitot pressure fluctuations converted into normalized static pressure fluctuations and the wedge probe readings. Quantitative results of the tunnel noise are provided in frequency ranges relevant for hypersonic boundary-layer transition. Complementary numerical simulations of the leading-edge receptivity to fast and slow acoustic waves were performed for the applied wedge probe at conditions corresponding to the experimental free-stream conditions. The receptivity to fast acoustic waves was found to be characterized by an early amplification of the induced fast mode. For slow acoustic waves an initial decay was found close to the leading edge. At all Mach numbers, and for all considered frequencies, the leading-edge receptivity to fast acoustic waves was found to be higher than the receptivity to slow acoustic waves. Further, the effect of inclination angles of the acoustic wave with respect to the flow direction was investigated. An inclination angle was found to increase the response on the wave-facing surface of the probe and decrease the response on the opposite surface for fast acoustic waves. A frequency-dependent response was found for slow acoustic waves. The combined numerical and experimental approach in the present study confirmed the previous suggestion that the slow acoustic wave is the dominant acoustic mode in noisy hypersonic wind tunnels.en
dc.description.sponsorshipThe present study was supported by an ESA funded Technology Research Project (ESA-Contract number $4200022793/09/NL/CP$).en
dc.formatapplication/pdfen
dc.languageen
dc.language.isoenen
dc.publisherCambridge University Press (CUP)en
dc.relation.urlhttps://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/combined-freestream-disturbance-measurements-and-receptivity-studies-in-hypersonic-wind-tunnels-by-means-of-a-slender-wedge-probe-and-direct-numerical-simulation/9481E9D34164EA3D680A81208548D62Den
dc.subjectboundary layersen
dc.subjectboundary layer receptivityen
dc.subjectcompressible flowsen
dc.subjectcompressible boundary layersen
dc.subjectinstabilityen
dc.subjecttransition to turbulenceen
dc.titleCombined free-stream disturbance measurements and receptivity studies in hypersonic wind tunnels by means of a slender wedge probe and direct numerical simulationen
dc.typeJournal articleen
dc.identifier.eissn1469-7645
dc.identifier.journalJournal of Fluid Mechanicsen
dc.date.updated2019-11-22T14:48:42Z
dc.date.accepted2018-01-25
rioxxterms.funderUniversity of Southampton
rioxxterms.identifier.projectESA-Contract number $4200022793/09/NL/CP$en
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttps://creativecommons.org/licenses/by-nc-sa/4.0/en
rioxxterms.licenseref.startdate2019-11-26en
dc.source.volume842
dc.source.beginpage495
dc.source.endpage531
dc.description.versionPublished version
refterms.dateFCD2019-11-26T12:54:35Z
refterms.versionFCDVoR
refterms.dateFOA2019-11-26T12:54:44Z


Files in this item

Thumbnail
Name:
JFM.pdf
Size:
1.789Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record

https://creativecommons.org/licenses/by-nc-sa/4.0/
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by-nc-sa/4.0/