{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/99122"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/99122","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Aerodynamic modeling of a 2-dimensional airfoil with a covert-inspired deployable flap using a discrete vortex method","abstract":"Unmanned aerial vehicles are expected to fulfill increasingly complex mission requirements but are limited by their inability to efficiently perform high-angle-of-attack maneuvers at low Reynolds numbers, while birds seem to perform these maneuvers with little effort. Birds use a passively-deployed feather called the covert feather to correct for flow reversal over their wings during high-angle-of-attack maneuvers, thereby delaying the onset of stall. The overall research goal is to extend the understanding of the covert feather's role during flight in nature and learn from it to increase the mission adaptability and agility of engineered aerial vehicles during high-angle-of-attack maneuvers and during gust. This thesis presents experimental lift results that show the benefits of attaching a covert-inspired flap to the suction side of an airfoil. Results from a CFD solver are compared to the experimental results and show good agreement. Furthermore, this work reports on the development of a low-order discrete vortex model meant to predict the lift of an airfoil with a covert-inspired flap. Results show that the discrete vortex model is able to reproduce the experimental results for certain flap deflection angles.","abstract_html":"Unmanned aerial vehicles are expected to fulfill increasingly complex mission requirements but are limited by their inability to efficiently perform high-angle-of-attack maneuvers at low Reynolds numbers, while birds seem to perform these maneuvers with little effort. Birds use a passively-deployed feather called the covert feather to correct for flow reversal over their wings during high-angle-of-attack maneuvers, thereby delaying the onset of stall. The overall research goal is to extend the understanding of the covert feather's role during flight in nature and learn from it to increase the mission adaptability and agility of engineered aerial vehicles during high-angle-of-attack maneuvers and during gust. This thesis presents experimental lift results that show the benefits of attaching a covert-inspired flap to the suction side of an airfoil. Results from a CFD solver are compared to the experimental results and show good agreement. Furthermore, this work reports on the development of a low-order discrete vortex model meant to predict the lift of an airfoil with a covert-inspired flap. Results show that the discrete vortex model is able to reproduce the experimental results for certain flap deflection angles.","abstract_has_math":false,"creators":["Waite, Josiah Mark"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Wissa, Aimy A"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-03-02T19:59:45Z","date_published":"2018-03-02T19:59:45Z","updated_at":"2026-07-22T22:24:37Z","subjects":["Bio-inspired design","Vortex method","Unsteady aerodynamics"],"languages":["en"],"rights":["Copyright 2017 Josiah Waite"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/99122","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Wissa, Aimy A"]},{"key":"dc:creator","label":"Author","values":["Waite, Josiah Mark"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-03-02T19:59:45Z","2020-03-03T10:15:18Z","2017-07-21","2017-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical 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":["Bio-inspired design","Vortex method","Unsteady aerodynamics"]}]},{"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 Josiah Waite"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/99122"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Unmanned aerial vehicles are expected to fulfill increasingly complex mission requirements but are limited by their inability to efficiently perform high-angle-of-attack maneuvers at low Reynolds numbers, while birds seem to perform these maneuvers with little effort. Birds use a passively-deployed feather called the covert feather to correct for flow reversal over their wings during high-angle-of-attack maneuvers, thereby delaying the onset of stall. The overall research goal is to extend the understanding of the covert feather's role during flight in nature and learn from it to increase the mission adaptability and agility of engineered aerial vehicles during high-angle-of-attack maneuvers and during gust. This thesis presents experimental lift results that show the benefits of attaching a covert-inspired flap to the suction side of an airfoil. Results from a CFD solver are compared to the experimental results and show good agreement. Furthermore, this work reports on the development of a low-order discrete vortex model meant to predict the lift of an airfoil with a covert-inspired flap. Results show that the discrete vortex model is able to reproduce the experimental results for certain flap deflection angles.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-08-01","The student, Josiah Waite, accepted the attached license on 2017-07-19 at 07:48.","The student, Josiah Waite, submitted this Thesis for approval on 2017-07-19 at 07:59.","This Thesis was approved for publication on 2017-07-21 at 11:33.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11521 on 2018-03-02 at 13:02:34","Made available in DSpace on 2018-03-02T19:59:45Z (GMT). No. of bitstreams: 2 WAITE-THESIS-2017.pdf: 24560523 bytes, checksum: 2331c94b2f320cb888474de26bb693f7 (MD5) LICENSE.txt: 4209 bytes, checksum: 34eb9e8893f8f6e6401071b9bda60320 (MD5) Previous issue date: 2017-07-21","Embargo set by: Seth Robbins for item 105076 Lift date: 2020-03-02T19:59:52Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","Embargo set by: Seth Robbins for item 105076 Lift date: 2020-03-02T20:02:46Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 105076 on 2020-03-03T10:15:18Z."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Aerodynamic modeling of a 2-dimensional airfoil with a covert-inspired deployable flap using a discrete vortex method"]}]}],"canonical_facts":{"dc:contributor":["Wissa, Aimy A"],"dc:creator":["Waite, Josiah Mark"],"dc:date":["2018-03-02T19:59:45Z","2020-03-03T10:15:18Z","2017-07-21","2017-08"],"dc:description":["Unmanned aerial vehicles are expected to fulfill increasingly complex mission requirements but are limited by their inability to efficiently perform high-angle-of-attack maneuvers at low Reynolds numbers, while birds seem to perform these maneuvers with little effort. Birds use a passively-deployed feather called the covert feather to correct for flow reversal over their wings during high-angle-of-attack maneuvers, thereby delaying the onset of stall. The overall research goal is to extend the understanding of the covert feather's role during flight in nature and learn from it to increase the mission adaptability and agility of engineered aerial vehicles during high-angle-of-attack maneuvers and during gust. This thesis presents experimental lift results that show the benefits of attaching a covert-inspired flap to the suction side of an airfoil. Results from a CFD solver are compared to the experimental results and show good agreement. Furthermore, this work reports on the development of a low-order discrete vortex model meant to predict the lift of an airfoil with a covert-inspired flap. Results show that the discrete vortex model is able to reproduce the experimental results for certain flap deflection angles.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-08-01","The student, Josiah Waite, accepted the attached license on 2017-07-19 at 07:48.","The student, Josiah Waite, submitted this Thesis for approval on 2017-07-19 at 07:59.","This Thesis was approved for publication on 2017-07-21 at 11:33.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11521 on 2018-03-02 at 13:02:34","Made available in DSpace on 2018-03-02T19:59:45Z (GMT). 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