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dc.contributor.authorAnbuselvan, K. K. N.
dc.contributor.authorAnand, Venu
dc.contributor.authorKrishna, Yedhu
dc.contributor.authorRao, Mohan G.
dc.date.accessioned2021-08-19T06:16:00Z
dc.date.available2021-08-19T06:16:00Z
dc.date.issued2021-05-19
dc.date.submitted2020-11-17
dc.identifier.citationAnbuselvan, K. K. N., Anand, V., Krishna, Y., & Rao, M. G. (2021). Spectroscopic investigations on impurities and their effect on the electron number density in the shock tube. Journal of Quantitative Spectroscopy and Radiative Transfer, 272, 107744. doi:10.1016/j.jqsrt.2021.107744
dc.identifier.issn1879-1352
dc.identifier.issn0022-4073
dc.identifier.doi10.1016/j.jqsrt.2021.107744
dc.identifier.urihttp://hdl.handle.net/10754/670683
dc.description.abstractAn accurate estimation of electron number density is significant in many plasma physics studies. In this paper, the effect of impurities in test gas on the electron number density of the plasma generated in the hypersonic flow of a free-piston driven hypersonic shock tube has been studied using optical emission spectroscopy. Emission spectra of argon plasma showed the presence of following impurities: sodium, potassium, nitrogen, oxygen and hydrogen. The electron number density calculated from the spectral broadening of argon emission lines, is one order of magnitude higher than the electron number density calculated from the thermochemical equilibrium flow model that does not include the impurities. Hence the results show that the presence of impurities has a significant impact on the shock tube plasma and warrants the need to include these effects in the thermochemical equilibrium flow model while investigating magneto-aerodynamic interaction flows and communication blackout studies in the hypersonic ground-based test facilities.
dc.description.sponsorshipThe experiments were carried out in the year 2016 as a part of the first author’s Doctoral programme under the supervision of Prof. K.P.J. Reddy in the Department of Aerospace Engineering, Indian Institute of Science, Bangalore. We are thankful to Prof. K.P.J. Reddy for providing valuable inputs and being very supportive of the published work.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0022407321002375
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, [272, , (2021-05-19)] DOI: 10.1016/j.jqsrt.2021.107744 . © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectEmission spectroscopy
dc.subjectElectron number density
dc.subjectHypersonic flow
dc.subjectShock tunnel
dc.subjectPlasma physics
dc.titleSpectroscopic investigations on impurities and their effect on the electron number density in the shock tube
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Quantitative Spectroscopy and Radiative Transfer
dc.rights.embargodate2023-05-19
dc.identifier.wosutWOS:000683571300016
dc.eprint.versionPost-print
dc.contributor.institutionAirbus India Private Limited, Bangalore.
dc.contributor.institutionDepartment of Electronics and Communication Engineering, National Institute of Technology Calicut, Kozhikode.
dc.contributor.institutionDepartment of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore.
dc.identifier.volume272
dc.identifier.pages107744
kaust.personKrishna, Yedhu
dc.date.accepted2021-05-11
dc.date.published-online2021-05-19
dc.date.published-print2021-09


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