Flow Analysis of Vibration Modes in Turbocharger Turbines

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dc.contributor.advisorTezduyar, Tayfun Een_US
dc.creatorPritchard, Noahen_US
dc.date.accessioned2024-05-22T17:44:16Zen_US
dc.date.available2024-05-22T17:44:16Zen_US
dc.date.created2024-05en_US
dc.date.issued2024-04-19en_US
dc.date.submittedMay 2024en_US
dc.date.updated2024-05-22T17:44:16Zen_US
dc.description.abstractThe purpose of this research is to help understand the influence of time-dependent fluid dynamics forces on the fatigue failure of turbomachinery blades. To that end, we conduct computational flow analysis of a turbocharger turbine with 13 rotor blades and 14 stator blades for precomputed time-dependent blade deformation patterns. The flow analysis is carried out for the rotor vibration modes corresponding to a set of natural frequencies lower than but close to the frequency associated with the upper end of the turbine operation range. The core computational method is the Space–Time Variational Multiscale (ST-VMS) method. The ST-VMS serves as a moving mesh method. That enables mesh-resolution control near the rotor surfaces and high-resolution boundary-layer representation. The core method is complemented with the “ST-SI-IGA,” which is the synthesis of the ST Slip Interface (ST-SI) method and ST Isogeometric Analysis (ST-IGA). The ST-SI enables the use of ST-VMS as a moving-mesh method even with the inner mesh rotating with the rotor. The ST-IGA with IGA basis functions in space brings superior accuracy to the geometry representation and flow solution. The ST-IGA with IGA basis functions in time enables higher-accuracy representation of the rotor motion and blade deformations.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationPritchard, Noah. Flow Analysis of Vibration Modes in Turbocharger Turbines. (2024). Masters thesis., Rice University. https://hdl.handle.net/1911/116237en_US
dc.identifier.urihttps://hdl.handle.net/1911/116237en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectTurbochargersen_US
dc.subjectisogeometric analysisen_US
dc.subjectfatigueen_US
dc.subjectFSIen_US
dc.titleFlow Analysis of Vibration Modes in Turbocharger Turbinesen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentMechanical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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