Investigation of Particle Trajectories for Wall Bounded Turbulent Two-Phase Flows

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dc.contributor.authorCardwell, Nicholas Donen
dc.contributor.committeecochairThole, Karen A.en
dc.contributor.committeecochairVlachos, Pavlos P.en
dc.contributor.committeememberDancey, Clinton L.en
dc.contributor.committeememberDiller, Thomas E.en
dc.contributor.committeememberSimpson, Roger L.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:18:41Zen
dc.date.adate2010-12-09en
dc.date.available2014-03-14T20:18:41Zen
dc.date.issued2010-04-02en
dc.date.rdate2010-12-09en
dc.date.sdate2010-11-17en
dc.description.abstractThe analysis of turbulent flows provides a unique scientific challenge whose solution remains central to unraveling the fundamental nature of all fluid dynamics. Measuring and predicting turbulent flows becomes even more difficult when considering a two-phase flow, which is a commonly encountered engineering problem across many disciplines. One such example, the ingestion of foreign debris into a gas turbine engine, provided the impetus for this study. Despite more than 40 years of research, operation with a particle-laden inlet flow remains a significant problem for modern turbomachines. The purpose, therefore, is to develop experimental methods for investigating multi-phase flows relevant to the cooling of gas turbine components. Initially, several generic components representing turbine cooling designs were evaluated with a particle-laden flow using a special high temperature test facility. The results of this investigation revealed that blockage was highly sensitive to the carrier flowfield as defined by the cooling geometry. A second group of experiments were conducted in one commonly used cooling design using a Time Resolved Digital Particle Image Velocimetry (TRDPIV) system that directly investigated both the carrier flowfield and particle trajectories. Traditional PIV processing algorithms, however, were unable to resolve the particle motions of the two-phase flow with sufficient fidelity. To address this issue, a new Particle Tracking Velocimetry (PTV) algorithm was developed and validated for both single-phase and two-phase flows. The newly developed PTV algorithm was shown to outperform other published algorithms as well as possessing a unique ability to handle particle laden two-phase flows. Overall, this work demonstrates several experimental methods that are well suited for the investigation of wall-bounded turbulent two-phase flows, with a special emphasis on a turbine cooling method. The studies contained herein provide valuable information regarding the previously unknown fluid and particle dynamics within the turbine cooling system.en
dc.description.degreePh. D.en
dc.identifier.otheretd-11172010-114849en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11172010-114849/en
dc.identifier.urihttp://hdl.handle.net/10919/29642en
dc.publisherVirginia Techen
dc.relation.haspartCardwell_ND_D_2010.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectInternal Coolingen
dc.subjectParticle Tracking Velocimetryen
dc.subjectGas Turbinesen
dc.subjectMultiphase Flowsen
dc.titleInvestigation of Particle Trajectories for Wall Bounded Turbulent Two-Phase Flowsen
dc.typeDissertationen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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