Investigation of Supersonic Mixing Using Laser-Induced Breakdown Spectroscopy

dc.contributor.advisorBuckley, Steven Gen_US
dc.contributor.authorTempel, Travisen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.date.accessioned2004-06-04T05:29:54Z
dc.date.available2004-06-04T05:29:54Z
dc.date.issued2004-05-05en_US
dc.description.abstractSupersonic mixing enhancement techniques are of considerable interest; typically qualitative observations of shear layer growth rate are used to compare these techniques. A more accurate assessment of the efficiency of various mixing techniques could be made using local species concentrations at specific points. Laser-induced breakdown spectroscopy (LIBS), which can determine local elemental concentrations in a flowfield, is applied to the supersonic mixing problem in this work. An investigation of mixing caused by cavity-induced resonance was completed in a Mach 2 wind tunnel using LIBS. Calibration experiments showed that LIBS is capable of measuring helium concentrations with ± 5%, ± 15%, ± 25%, and ± 40% fractional error for ranges of 0-25%, 25-45%, 45-75%, and 75-100% helium. Quantitative helium concentration measurements were performed at several points in the flow field. The results showed that cavity-induced resonance caused an increase in the mixing between helium and air in supersonic flow.en_US
dc.format.extent849895 bytes
dc.format.extent3016192 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/msword
dc.identifier.urihttp://hdl.handle.net/1903/1391
dc.language.isoen_US
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_US
dc.relation.isAvailableAtUniversity of Maryland (College Park, Md.)en_US
dc.subject.pqcontrolledEngineering, Mechanicalen_US
dc.subject.pquncontrolledlaser induced breakdown spectroscopyen_US
dc.subject.pquncontrolledsupersonic mixingen_US
dc.titleInvestigation of Supersonic Mixing Using Laser-Induced Breakdown Spectroscopyen_US
dc.typeThesisen_US

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