Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/150227
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dc.contributor.authorLim, H.D.en_US
dc.contributor.authorNew, Tze Howen_US
dc.contributor.authorMariani, Raffaelloen_US
dc.contributor.authorCui, Yi Danen_US
dc.date.accessioned2021-05-20T03:16:19Z-
dc.date.available2021-05-20T03:16:19Z-
dc.date.issued2019-
dc.identifier.citationLim, H., New, T. H., Mariani, R. & Cui, Y. D. (2019). Effects of bevelled nozzles on standoff shocks in supersonic impinging jets. Aerospace Science and Technology, 94, 105371-. https://dx.doi.org/10.1016/j.ast.2019.105371en_US
dc.identifier.issn1270-9638en_US
dc.identifier.urihttps://hdl.handle.net/10356/150227-
dc.description.abstractModerately under-expanded jets issuing from a circular baseline and two bevelled circular nozzles impinging upon a perpendicular flat plate were experimentally studied. The effects of nozzle-pressure-ratio and separation distance variations on the standoff shock formations were investigated with schlieren visualizations and a visual hull based three-dimensional (3D) shock reconstruction technique to provide deeper insights into their 3D features. Across all flow configurations arising from the different combinations of these parameters, results indicated that the bevelled nozzles are effective in introducing asymmetry to the standoff shock geometries. Depending on the exact flow configuration, standoff shock locations may also undergo significant upstream displacements. In particular, the single-bevelled nozzle produces highly unsteady standoff shocks with asymmetric oscillation amplitudes along both side of the nozzle lip regions. Changes to the standoff shock key characteristics were observed to be sensitive towards the jet shock structures and reflection point modified by the bevelled nozzle exits. In particular, the strength and relative position of the reflection point are identified as the major contributing factors influencing the upstream static pressure distribution of the standoff shock, hence leading to the observed changes in the standoff shock behaviour.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.language.isoenen_US
dc.relationMOE2014-T2-1-002en_US
dc.relation.ispartofAerospace Science and Technologyen_US
dc.rights© 2019 Elsevier Masson SAS. All rights reserved. This paper was published by Elsevier in Aerospace Science and Technology and is made available with permission of Elsevier Masson SAS.en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.titleEffects of bevelled nozzles on standoff shocks in supersonic impinging jetsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.identifier.doi10.1016/j.ast.2019.105371-
dc.description.versionAccepted versionen_US
dc.identifier.scopus2-s2.0-85071907410-
dc.identifier.volume94en_US
dc.identifier.spage105371en_US
dc.subject.keywordsSchlierenen_US
dc.subject.keywordsStandoff Shocksen_US
dc.description.acknowledgementThe authors gratefully acknowledge support for the study through a Singapore Ministry of Education AcRF Tier-2 grant (Grant number: MOE2014-T2-1-002), as well as support for the first author through an NTU Nanyang President Graduate Scholarship, and facility support from Temasek Laboratories at National University of Singapore.en_US
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