The source and evolution of turbulence in trailing vortex pairs

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dc.contributor.authorVogel, Christine M.en
dc.contributor.departmentAerospace Engineeringen
dc.date.accessioned2014-03-14T21:26:39Zen
dc.date.adate2009-01-10en
dc.date.available2014-03-14T21:26:39Zen
dc.date.issued1995en
dc.date.rdate2009-01-10en
dc.date.sdate2009-01-10en
dc.description.abstractThe reanalysis of data obtained from the experimental study of two different trailing vortex pairs has been conducted to obtain a more complete understanding of the turbulence structure of these flows. Statistical and spectral results, as well as filtered results and estimates of the effects of vortex wandering on the characteristics of the flows are presented. The results of the vortex pair are compared with the data from the experimental study of an isolated vortex conducted under similar testing conditions and model configuration to distinguish between the structure and effects of the the separate vortices from those of vortex interaction. The analysis of a counter-rotating vortex pair reveal that initially the vortices develop in a manner similar to an isolated vortex. The cores appear laminar and the turbulence structure outside them is dominated by the spiral wakes. After some distance, flow inside and outside the cores becomes much more turbulent. The cores begin to grow and decay. The results indicate that this change may be a result of wave instabilities developed in the cores. The analysis of the co-rotating vortex pair reveal that turbulence is present in the cores as they spiral about each other and move downstream. After a certain distance the cores merge into a single core, which contains more turbulence and is over twice the size of the pair that created it. As merger comes to completion, a symmetric core is formed which has much less turbulence. Merger appears to cause an increased rate of vortex decay.en
dc.description.degreeMaster of Scienceen
dc.format.extentxxi, 234 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-01102009-063119en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01102009-063119/en
dc.identifier.urihttp://hdl.handle.net/10919/40549en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1995.V644.pdfen
dc.relation.isformatofOCLC# 34108307en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1995.V644en
dc.titleThe source and evolution of turbulence in trailing vortex pairsen
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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