Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/160900
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dc.contributor.authorMariani, Raffaelloen_US
dc.contributor.authorLim, Desmond Haoxiangen_US
dc.contributor.authorZang, Binen_US
dc.contributor.authorVevek, U. S.en_US
dc.contributor.authorNew, Tze Howen_US
dc.contributor.authorCui, Y. D.en_US
dc.date.accessioned2022-08-05T07:08:54Z-
dc.date.available2022-08-05T07:08:54Z-
dc.date.issued2020-
dc.identifier.citationMariani, R., Lim, D. H., Zang, B., Vevek, U. S., New, T. H. & Cui, Y. D. (2020). On the application of non-standard rainbow schlieren technique upon supersonic jets. Journal of Visualization, 23(3), 383-393. https://dx.doi.org/10.1007/s12650-020-00637-yen_US
dc.identifier.issn1343-8875en_US
dc.identifier.urihttps://hdl.handle.net/10356/160900-
dc.description.abstractA quantitative rainbow schlieren study was conducted on an over-expanded jet at nozzle pressure ratio of 2.8, based on two different schlieren set-ups: the standard z-type and a single-mirror schlieren set-up. The technique used a single, weak focal-length lens placed in the field of view of the system to provide the calibration information required for the extraction of the quantitative data. In the case of the single-mirror set-up, the calibration image required further post-processing procedures to take into account the double refraction experienced by the light. Density gradients were calculated using Abel transform and compared to validated reference data. Results indicate that the single-mirror set-up is able to improve prediction of the density gradient field as compared to the standard z-type schlieren, due to its inherent property of higher sensitivity. The study has shown that the single-mirror set-up performs on average better than the standard z-type system, yielding an overall averaged error of ± 20%, with localized values as low as ± 5% where the shock cell structure is clearly defined, with respect to the validated reference data. At the same time, both systems perform poorly in regions where the flow structure displays poor image contrast.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.ispartofJournal of Visualizationen_US
dc.rights© 2020 The Visualization Society of Japan. All rights reserved.en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.titleOn the application of non-standard rainbow schlieren technique upon supersonic jetsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.identifier.doi10.1007/s12650-020-00637-y-
dc.identifier.scopus2-s2.0-85083378097-
dc.identifier.issue3en_US
dc.identifier.volume23en_US
dc.identifier.spage383en_US
dc.identifier.epage393en_US
dc.subject.keywordsRainbow Schlierenen_US
dc.subject.keywordsSingle Mirroren_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), support for the second and third authors through NTU Nanyang President Graduate Scholarship and MAE Graduate Research Officer scheme respectively.en_US
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