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dc.contributor.advisorThurow, Brian
dc.contributor.authorJohnson, Kyle
dc.date.accessioned2019-12-09T15:08:33Z
dc.date.available2019-12-09T15:08:33Z
dc.date.issued2019-12-09
dc.identifier.urihttp://hdl.handle.net/10415/7048
dc.description.abstractVortex topology is analyzed from measurements of flow over a flat, rectangular plate with an aspect ratio of 2 which was articulated in pitch and roll, individually and simultaneously. The plate was immersed into a Re = 10,000 flow (based on chord length) to provide forward flight component of the study. Measurements were made using a 3D-3C plenoptic PIV system to allow for the study of complete vortex topology of the entire wing. The prominent focus is the early development of the leading-edge vortex (LEV) and resulting topology. The effect of the wing kinematics on the topology was explored through a parameter space involving multiple values of pitch rate and roll rate at pitch and roll angles up to 50°. Characterization and comparisons across the expansive data set are made possible through the use of a newly defined dimensionless parameter, k_rg. Termed the effective reduced pitch rate, k_rg is a measure of the pitch rate that considers the relative rolling motion of the wing in addition to the pitching motion and freestream velocity. The study has found the addition of a rolling motion to a pitching wing removes the symmetries in the vortical structures, delays vortex evolution, and inhibits the extent of detachment of the LEV. Additionally, it was found that increasing the k_rg parameter accelerates the evolution of the LEV, from formation to detachment, as well as advances the evolution of the LEV in nondimensionalized time.en_US
dc.subjectAerospace Engineeringen_US
dc.titleVortex Topology of a Pitching and Rolling Wing in Forward Flighten_US
dc.typePhD Dissertationen_US
dc.embargo.lengthen_US
dc.embargo.statusNOT_EMBARGOEDen_US


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