{"id":{"repo_id":"tamu","oai_identifier":"oai:oaktrust.library.tamu.edu:1969.1/197985"},"canonical_url":"https://search.dev.ndltd.org/etd/tamu/oai:oaktrust.library.tamu.edu:1969.1/197985","repository":{"repo_id":"tamu","name":"Texas A&M University","base_url":"https://oaktrust.library.tamu.edu/server/oai/request"},"display":{"title":"Particle Image Velocimetry of Fluid Flow in an 85-Pin Hexagonal Rod Bundle with Spacer Grids for a Gas-Cooled Fast Modular Reactor","abstract":"The Department of Energy Integrated Research Project (IRP) is developing a 50 MWe helium-cooled fast modular reactor (FMR), and has tasked Texas A&M University with conducting the thermal-hydraulic characterization of the baseline core configuration of the FMR. The experimental thermal-hydraulic investigation consisted of the axial and radial flow field characteristics in the hexagonal fuel rod bundle composed of 84 fuel rods, a central control rod, and spacer grids at a Reynolds number of 12,000. The experimental facility resembles one unit of the total fuel assembly and was constructed to be fully transparent to perform optical measurements. Time-Resolved Particle Image Velocimetry (TR-PIV) measurements were used to characterize hydraulic behavior downstream the spacer grid. In each orientation, using the PIV velocity vector fields, the full-field flow statistics were computed for the mean velocity, vorticity, and Reynolds stresses. An analysis of the energy decay downstream of the spacer grid was conducted with calculations of secondary-flow intensities, turbulent kinetic energy, power spectrum density, and spatial-temporal velocity cross correlations. Analysis in the two dimensional axial and radial flow statistics allowed for three dimensional conclusions and is shown in a 3D vorticity model. The data from this experimental campaign will be used to to validate numerical models based on Computational Fluid Dynamics (CFD) and other codes.","abstract_html":"The Department of Energy Integrated Research Project (IRP) is developing a 50 MWe helium-cooled fast modular reactor (FMR), and has tasked Texas A&M University with conducting the thermal-hydraulic characterization of the baseline core configuration of the FMR. The experimental thermal-hydraulic investigation consisted of the axial and radial flow field characteristics in the hexagonal fuel rod bundle composed of 84 fuel rods, a central control rod, and spacer grids at a Reynolds number of 12,000. The experimental facility resembles one unit of the total fuel assembly and was constructed to be fully transparent to perform optical measurements. Time-Resolved Particle Image Velocimetry (TR-PIV) measurements were used to characterize hydraulic behavior downstream the spacer grid. In each orientation, using the PIV velocity vector fields, the full-field flow statistics were computed for the mean velocity, vorticity, and Reynolds stresses. An analysis of the energy decay downstream of the spacer grid was conducted with calculations of secondary-flow intensities, turbulent kinetic energy, power spectrum density, and spatial-temporal velocity cross correlations. Analysis in the two dimensional axial and radial flow statistics allowed for three dimensional conclusions and is shown in a 3D vorticity model. The data from this experimental campaign will be used to to validate numerical models based on Computational Fluid Dynamics (CFD) and other codes.","abstract_has_math":false,"creators":["Carroll, Alfred D"],"institution":"Texas A&M University","degree_name":"Master of Science","degree_level":"Masters","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":[],"advisors":["Hassan, Yassin A"],"committee_chairs":[],"committee_members":["Vaghetto, Rodolfo","Antao, Dion"],"year":2022,"date_issued":"2022-07-15","date_published":"2022-07-15","updated_at":"2026-08-21T16:48:44Z","subjects":["Gen IV","gas-cooled fast modular reactors","hexagonal rod bundle","3D-printed bare spacer grid","particle image velocimetry (PIV)","matching of index of refraction (MIR)","turbulence."],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1969.1/197985","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"source_record":{"url":"https://oaktrust.library.tamu.edu/server/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Aoaktrust.library.tamu.edu%3A1969.1%2F197985","prefix":"dim"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Hassan, Yassin A"]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Vaghetto, Rodolfo","Antao, Dion"]},{"key":"dc:creator","label":"Author","values":["Carroll, Alfred D"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2023-05-26T18:04:36Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2024-08-01T05:58:30Z"]},{"key":"dc:date.issued","label":"Date","values":["2022-07-15"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Texas A&M University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Gen IV","gas-cooled fast modular reactors","hexagonal rod bundle","3D-printed bare spacer grid","particle image velocimetry (PIV)","matching of index of refraction (MIR)","turbulence."]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1969.1/197985"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The Department of Energy Integrated Research Project (IRP) is developing a 50 MWe helium-cooled fast modular reactor (FMR), and has tasked Texas A&M University with conducting the thermal-hydraulic characterization of the baseline core configuration of the FMR. The experimental thermal-hydraulic investigation consisted of the axial and radial flow field characteristics in the hexagonal fuel rod bundle composed of 84 fuel rods, a central control rod, and spacer grids at a Reynolds number of 12,000. The experimental facility resembles one unit of the total fuel assembly and was constructed to be fully transparent to perform optical measurements. Time-Resolved Particle Image Velocimetry (TR-PIV) measurements were used to characterize hydraulic behavior downstream the spacer grid. In each orientation, using the PIV velocity vector fields, the full-field flow statistics were computed for the mean velocity, vorticity, and Reynolds stresses. An analysis of the energy decay downstream of the spacer grid was conducted with calculations of secondary-flow intensities, turbulent kinetic energy, power spectrum density, and spatial-temporal velocity cross correlations. Analysis in the two dimensional axial and radial flow statistics allowed for three dimensional conclusions and is shown in a 3D vorticity model. The data from this experimental campaign will be used to to validate numerical models based on Computational Fluid Dynamics (CFD) and other codes."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Particle Image Velocimetry of Fluid Flow in an 85-Pin Hexagonal Rod Bundle with Spacer Grids for a Gas-Cooled Fast Modular Reactor"]}]}],"canonical_facts":{"dc:contributor.advisor":["Hassan, Yassin A"],"dc:contributor.committeemember":["Vaghetto, Rodolfo","Antao, Dion"],"dc:creator":["Carroll, Alfred D"],"dc:date.accessioned":["2023-05-26T18:04:36Z"],"dc:date.available":["2024-08-01T05:58:30Z"],"dc:date.issued":["2022-07-15"],"dc:description.abstract":["The Department of Energy Integrated Research Project (IRP) is developing a 50 MWe helium-cooled fast modular reactor (FMR), and has tasked Texas A&M University with conducting the thermal-hydraulic characterization of the baseline core configuration of the FMR. The experimental thermal-hydraulic investigation consisted of the axial and radial flow field characteristics in the hexagonal fuel rod bundle composed of 84 fuel rods, a central control rod, and spacer grids at a Reynolds number of 12,000. The experimental facility resembles one unit of the total fuel assembly and was constructed to be fully transparent to perform optical measurements. Time-Resolved Particle Image Velocimetry (TR-PIV) measurements were used to characterize hydraulic behavior downstream the spacer grid. In each orientation, using the PIV velocity vector fields, the full-field flow statistics were computed for the mean velocity, vorticity, and Reynolds stresses. An analysis of the energy decay downstream of the spacer grid was conducted with calculations of secondary-flow intensities, turbulent kinetic energy, power spectrum density, and spatial-temporal velocity cross correlations. Analysis in the two dimensional axial and radial flow statistics allowed for three dimensional conclusions and is shown in a 3D vorticity model. The data from this experimental campaign will be used to to validate numerical models based on Computational Fluid Dynamics (CFD) and other codes."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["https://hdl.handle.net/1969.1/197985"],"dc:language.iso":["en"],"dc:subject":["Gen IV","gas-cooled fast modular reactors","hexagonal rod bundle","3D-printed bare spacer grid","particle image velocimetry (PIV)","matching of index of refraction (MIR)","turbulence."],"dc:title":["Particle Image Velocimetry of Fluid Flow in an 85-Pin Hexagonal Rod Bundle with Spacer Grids for a Gas-Cooled Fast Modular Reactor"],"dc:type":["Thesis"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Texas A&M University"]},"updated_at":"2026-08-21T16:48:44Z"}