{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/36982"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/36982","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Experimental Analysis of an Advanced-Design, Quasi-Radial Diffuser Receiving an Oscillating Jet","abstract":"Methods of experimental analysis of airflow through an advanced-design, quasi-radial diffuser receiving an oscillating jet induced by a rotating baffle were devised and performed. The initially unsteady flow was found to lose its unsteadiness as it progressed through the diffuser and exited into the atmosphere. Within the diffuser, regions of slow flow in the lee of ventilation holes exist due to entrainment. The addition of a convergence insert across from these holes increased flow speeds, but also deflected the flow farther away from the holes, aiding separation. The predominantly steady flow over a flat plate upon which the exiting flow impinged produced an asymmetric static pressure profile. This was probably due to the mechanism that set up the oscillations in the flow, the rotating baffle.","abstract_html":"Methods of experimental analysis of airflow through an advanced-design, quasi-radial diffuser receiving an oscillating jet induced by a rotating baffle were devised and performed. The initially unsteady flow was found to lose its unsteadiness as it progressed through the diffuser and exited into the atmosphere. Within the diffuser, regions of slow flow in the lee of ventilation holes exist due to entrainment. The addition of a convergence insert across from these holes increased flow speeds, but also deflected the flow farther away from the holes, aiding separation. The predominantly steady flow over a flat plate upon which the exiting flow impinged produced an asymmetric static pressure profile. This was probably due to the mechanism that set up the oscillations in the flow, the rotating baffle.","abstract_has_math":false,"creators":["Mathes, Andrew R."],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Engineering Mechanics","degree_department":"Engineering Mechanics","school":null,"contributors":[],"advisors":[],"committee_chairs":["Telionis, Demetri P."],"committee_members":["Gürdal, Zafer","Hajj, Muhammad R."],"year":1997,"date_issued":"1997-07-01","date_published":"1997-07-01","updated_at":"2026-07-22T22:20:23Z","subjects":["none"],"languages":[],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-81597-94044"],"render_values":[{"text":"etd-81597-94044","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/36982","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["Telionis, Demetri P."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Gürdal, Zafer","Hajj, Muhammad R."]},{"key":"dc:contributor.department","label":"Department","values":["Engineering Mechanics"]},{"key":"dc:creator","label":"Author","values":["Mathes, Andrew R."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-03-14T20:52:25Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-03-14T20:52:25Z","1997-09-17"]},{"key":"dc:date.issued","label":"Date","values":["1997-07-01"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Engineering Mechanics"]},{"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":["Virginia Polytechnic Institute and State University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["none"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-81597-94044"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/36982"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Methods of experimental analysis of airflow through an advanced-design, quasi-radial diffuser receiving an oscillating jet induced by a rotating baffle were devised and performed. The initially unsteady flow was found to lose its unsteadiness as it progressed through the diffuser and exited into the atmosphere. Within the diffuser, regions of slow flow in the lee of ventilation holes exist due to entrainment. The addition of a convergence insert across from these holes increased flow speeds, but also deflected the flow farther away from the holes, aiding separation. The predominantly steady flow over a flat plate upon which the exiting flow impinged produced an asymmetric static pressure profile. This was probably due to the mechanism that set up the oscillations in the flow, the rotating baffle."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:title","label":"Title","values":["Experimental Analysis of an Advanced-Design, Quasi-Radial Diffuser Receiving an Oscillating Jet"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Telionis, Demetri P."],"dc:contributor.committeemember":["Gürdal, Zafer","Hajj, Muhammad R."],"dc:contributor.department":["Engineering Mechanics"],"dc:creator":["Mathes, Andrew R."],"dc:date.accessioned":["2014-03-14T20:52:25Z"],"dc:date.available":["2014-03-14T20:52:25Z","1997-09-17"],"dc:date.issued":["1997-07-01"],"dc:description.abstract":["Methods of experimental analysis of airflow through an advanced-design, quasi-radial diffuser receiving an oscillating jet induced by a rotating baffle were devised and performed. The initially unsteady flow was found to lose its unsteadiness as it progressed through the diffuser and exited into the atmosphere. Within the diffuser, regions of slow flow in the lee of ventilation holes exist due to entrainment. The addition of a convergence insert across from these holes increased flow speeds, but also deflected the flow farther away from the holes, aiding separation. The predominantly steady flow over a flat plate upon which the exiting flow impinged produced an asymmetric static pressure profile. 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