{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/97433"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/97433","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Design and development of a continuous, open-return transonic wind tunnel facility","abstract":"A new transonic wind tunnel facility was designed and built on the University of Illinois at Urbana-Champaign campus to enhance testing capabilities of the transonic flow regime. The new tunnel will expand the experimental capabilities available to the Department of Aerospace Engineering at UIUC for studying and understanding topics such as compressible dynamic stall aerodynamics, shock buffet phenomenon and control, shock wave boundary layer ingestion to a propulsor, and other future research topics. The new wind tunnel is a rectangular testing facility with a 6 in (width) x 9 in (height) cross-sectional area in the test section. It is a continuous, open-return facility, capable of operating within a Mach number range of M=0-0.8, and possibly reaching M=0.85 or higher depending on the test section configuration. The wind tunnel was assembled and installed in the Aerodynamics Research Laboratory. The tunnel is driven by a centrifugal blower that exhausts the air back into the laboratory. The components designed for the tunnel were the nozzle, diffuser, test section, settling chamber, inlet flow conditioning section, and the structural assembly. The most significant challenges in the design and development of the tunnel were enveloped in the test section and suction plenum control system. When performing experiments on transonic aerodynamic bodies, if the Mach number is high enough, pockets of locally supersonic flow will be seen in the test section. Therefore, to simulate unbounded transonic flight, partially-open test section walls were implemented to prevent shock reflections and test section choking. The suction across these walls was controlled by flaps at the aft end of the test section. The pressure differential created across the open-area walls can cause vibrational issues if adequate suction is not provided and unloaded into the diffuser via control flaps. For this reason, thicker open-area walls were substituted after the testing with thinner walls experienced these undesirable vibrations.","abstract_html":"A new transonic wind tunnel facility was designed and built on the University of Illinois at Urbana-Champaign campus to enhance testing capabilities of the transonic flow regime. The new tunnel will expand the experimental capabilities available to the Department of Aerospace Engineering at UIUC for studying and understanding topics such as compressible dynamic stall aerodynamics, shock buffet phenomenon and control, shock wave boundary layer ingestion to a propulsor, and other future research topics. The new wind tunnel is a rectangular testing facility with a 6 in (width) x 9 in (height) cross-sectional area in the test section. It is a continuous, open-return facility, capable of operating within a Mach number range of M=0-0.8, and possibly reaching M=0.85 or higher depending on the test section configuration. The wind tunnel was assembled and installed in the Aerodynamics Research Laboratory. The tunnel is driven by a centrifugal blower that exhausts the air back into the laboratory. The components designed for the tunnel were the nozzle, diffuser, test section, settling chamber, inlet flow conditioning section, and the structural assembly. The most significant challenges in the design and development of the tunnel were enveloped in the test section and suction plenum control system. When performing experiments on transonic aerodynamic bodies, if the Mach number is high enough, pockets of locally supersonic flow will be seen in the test section. Therefore, to simulate unbounded transonic flight, partially-open test section walls were implemented to prevent shock reflections and test section choking. The suction across these walls was controlled by flaps at the aft end of the test section. The pressure differential created across the open-area walls can cause vibrational issues if adequate suction is not provided and unloaded into the diffuser via control flaps. For this reason, thicker open-area walls were substituted after the testing with thinner walls experienced these undesirable vibrations.","abstract_has_math":false,"creators":["Gray, Cody D"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["Ansell, Phillip J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-08-10T19:15:42Z","date_published":"2017-08-10T19:15:42Z","updated_at":"2026-07-22T22:24:34Z","subjects":["Transonic"],"languages":["en"],"rights":["Copyright 2017 Cody Gray"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/97433","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ansell, Phillip J."]},{"key":"dc:creator","label":"Author","values":["Gray, Cody D"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2017-08-10T19:15:42Z","2017-04-24","2017-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Aerospace Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Transonic"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2017 Cody Gray"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/97433"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A new transonic wind tunnel facility was designed and built on the University of Illinois at Urbana-Champaign campus to enhance testing capabilities of the transonic flow regime. The new tunnel will expand the experimental capabilities available to the Department of Aerospace Engineering at UIUC for studying and understanding topics such as compressible dynamic stall aerodynamics, shock buffet phenomenon and control, shock wave boundary layer ingestion to a propulsor, and other future research topics. The new wind tunnel is a rectangular testing facility with a 6 in (width) x 9 in (height) cross-sectional area in the test section. It is a continuous, open-return facility, capable of operating within a Mach number range of M=0-0.8, and possibly reaching M=0.85 or higher depending on the test section configuration. The wind tunnel was assembled and installed in the Aerodynamics Research Laboratory. The tunnel is driven by a centrifugal blower that exhausts the air back into the laboratory. The components designed for the tunnel were the nozzle, diffuser, test section, settling chamber, inlet flow conditioning section, and the structural assembly. The most significant challenges in the design and development of the tunnel were enveloped in the test section and suction plenum control system. When performing experiments on transonic aerodynamic bodies, if the Mach number is high enough, pockets of locally supersonic flow will be seen in the test section. Therefore, to simulate unbounded transonic flight, partially-open test section walls were implemented to prevent shock reflections and test section choking. The suction across these walls was controlled by flaps at the aft end of the test section. The pressure differential created across the open-area walls can cause vibrational issues if adequate suction is not provided and unloaded into the diffuser via control flaps. For this reason, thicker open-area walls were substituted after the testing with thinner walls experienced these undesirable vibrations.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-08-10 without embargo terms","The student, Cody Gray, accepted the attached license on 2017-04-21 at 10:59.","The student, Cody Gray, submitted this Thesis for approval on 2017-04-21 at 11:23.","This Thesis was approved for publication on 2017-04-24 at 17:39.","DSpace SAF Submission Ingestion Package generated from Vireo submission #10969 on 2017-08-10 at 13:43:41","Made available in DSpace on 2017-08-10T19:15:42Z (GMT). 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The new tunnel will expand the experimental capabilities available to the Department of Aerospace Engineering at UIUC for studying and understanding topics such as compressible dynamic stall aerodynamics, shock buffet phenomenon and control, shock wave boundary layer ingestion to a propulsor, and other future research topics. The new wind tunnel is a rectangular testing facility with a 6 in (width) x 9 in (height) cross-sectional area in the test section. It is a continuous, open-return facility, capable of operating within a Mach number range of M=0-0.8, and possibly reaching M=0.85 or higher depending on the test section configuration. The wind tunnel was assembled and installed in the Aerodynamics Research Laboratory. The tunnel is driven by a centrifugal blower that exhausts the air back into the laboratory. The components designed for the tunnel were the nozzle, diffuser, test section, settling chamber, inlet flow conditioning section, and the structural assembly. The most significant challenges in the design and development of the tunnel were enveloped in the test section and suction plenum control system. When performing experiments on transonic aerodynamic bodies, if the Mach number is high enough, pockets of locally supersonic flow will be seen in the test section. Therefore, to simulate unbounded transonic flight, partially-open test section walls were implemented to prevent shock reflections and test section choking. The suction across these walls was controlled by flaps at the aft end of the test section. The pressure differential created across the open-area walls can cause vibrational issues if adequate suction is not provided and unloaded into the diffuser via control flaps. For this reason, thicker open-area walls were substituted after the testing with thinner walls experienced these undesirable vibrations.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-08-10 without embargo terms","The student, Cody Gray, accepted the attached license on 2017-04-21 at 10:59.","The student, Cody Gray, submitted this Thesis for approval on 2017-04-21 at 11:23.","This Thesis was approved for publication on 2017-04-24 at 17:39.","DSpace SAF Submission Ingestion Package generated from Vireo submission #10969 on 2017-08-10 at 13:43:41","Made available in DSpace on 2017-08-10T19:15:42Z (GMT). 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