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dc.contributor.advisorSarpkaya, Turgut
dc.contributor.authorCarroll, John B.
dc.dateSeptember 1993
dc.date.accessioned2014-03-26T23:23:51Z
dc.date.available2014-03-26T23:23:51Z
dc.date.issued1993-09
dc.identifier.urihttp://hdl.handle.net/10945/39925
dc.descriptionApproved for public release; distribution is unlimited.en_US
dc.description.abstractThe unsteady flow phenomena resulting from the interaction of wakes and vortices with the free surface are of particular importance in naval hydrodynamics. Ship and submarine wakes produce a three-dimensional complex signature, comprised of a narrow dark band bordered by two bright lines in synthetic-aperture-radar (SAR) images. The dark band signifies the suppression of waves at the Bragg frequency as a consequence of the interaction between the free surface and the imposed vorticity. In the present investigation, the vorticity field is provided by a single tip vortex generated by an airfoil. The results, obtained with an LDV, have shown that the free surface redistributes part or all of the normal turbulent kinetic energy into streamwise and spanwise components. The turbulent kinetic energy first decreases sharply with increasing vertical distance from the vortex and then remains nearly constant within a thin layer below the 'roughened' free surface. The results explain the longevity of the structures and lend further credence to the simulation of near-surface structures via vortex- or contour-dynamics.en_US
dc.description.urihttp://archive.org/details/freesurfacevorti1094539925
dc.format.extent48 p.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.titleFree-surface/vorticity interactionen_US
dc.typeThesisen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentMechanical Engineering
dc.subject.authorSurface disturbancesen_US
dc.subject.authorScarsen_US
dc.subject.authorStriationsen_US
dc.subject.authorTrailing voticesen_US
dc.subject.authorVortex dynamicsen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Mechanical Engineeringen_US
etd.thesisdegree.nameDegree of Mechanical Engineeren_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.levelProfessional Degreeen_US
etd.thesisdegree.disciplineMechanical Engineering and Mechanical Engineeren_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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