An experimental investigation of the breakup of a viscoelastic non-newtonian fluid in a supersonic stream

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dc.contributor.authorChadwick, Kenneth Michaelen
dc.contributor.committeechairYates, Charlie L.en
dc.contributor.committeememberSchetz, Joseph A.en
dc.contributor.committeememberJakubowski, Antoni K.en
dc.contributor.departmentAerospace Engineeringen
dc.date.accessioned2014-03-14T21:33:45Zen
dc.date.adate2009-04-14en
dc.date.available2014-03-14T21:33:45Zen
dc.date.issued1990-10-04en
dc.date.rdate2009-04-14en
dc.date.sdate2009-04-14en
dc.description.abstractA basic experimental study of the aerodynamic breakup of a viscoelastic non-Newtonian liquid injected into a supersonic stream was conducted. All test runs were made either at a free stream Mach number of 2.4 and a total pressure of 4.1 atm or a Mach number of 4.0 and a total pressure of 10.9 atm. The air flow had a total temperature of 300 K, and the injectant was always at room temperature. The injectant used for the majority of the test runs was diethylmalonate thickened with polymethyl-methacrylate, which has the characteristics of being viscoelastic. A limited number of test runs were made with glycerin in order to make a comparison between the behavior of Newtonian and viscoelastic non-Newtonian fluids. Several areas concerning the disintegration of the viscoelastic non-Newtonian fluid were investigated, including the effects of free stream Mach number, injection velocity, jet diameter, twin in-line jets, injection angle, and injector shape. Spark Shadowgraphs of 1.2 microsecond duration and high speed movies were obtained to qualitatively appraise the breakup behavior. The breakup of the jet was found to be a function of free stream Mach number and jet diameter, injection angle, and frontal area. It also was observed that the breakup behavior of the viscoelastic non-Newtonian fluid is remarkably different from that of (Newtonian) glycerin. The time scales for breakup are substantially increased regarding the dissemination of the viscoelastic liquid as compared to the Newtonian glycerin. Furthermore, penetration of the viscoelastic non-Newtonian fluid was observed to be on the order of 50% less than that measured for glycerin at comparable injection conditions.en
dc.description.degreeMaster of Scienceen
dc.format.extentxi, 71 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-04142009-040630en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04142009-040630/en
dc.identifier.urihttp://hdl.handle.net/10919/42082en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1990.C423.pdfen
dc.relation.isformatofOCLC# 23603900en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1990.C423en
dc.subject.lcshFluid dynamics -- Researchen
dc.subject.lcshNon-Newtonian fluidsen
dc.titleAn experimental investigation of the breakup of a viscoelastic non-newtonian fluid in a supersonic streamen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineAerospace Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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