{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/90675"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/90675","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Prediction and experimental evaluation of planar wing spanloads for minimum drag","abstract":"Optimum wing spanloads were evaluated by comparing wing performance values from theoretical predictions and experimental wind-tunnel measurements. The optimum spanloads were found using a Lagrange multiplier optimization method. They were designed with a prescribed wing-root bending moment constraint with and without incorporating viscous representation. Wind-tunnel models were created based on the optimum spanloads and the experiments were conducted to evaluate the changes in drag as the design constraints differed. The results indicate that an optimized spanload having equal lift and wing-root bending moment to that of an elliptically-loaded wing can experience significant decreases in drag. Comparisons between the theoretical predictions and the wind-tunnel models were made using experimental 5-hole probe wake-survey measurements, which were reduced into total lift and drag, as well as spanwise lift distributions.","abstract_html":"Optimum wing spanloads were evaluated by comparing wing performance values from theoretical predictions and experimental wind-tunnel measurements. The optimum spanloads were found using a Lagrange multiplier optimization method. They were designed with a prescribed wing-root bending moment constraint with and without incorporating viscous representation. Wind-tunnel models were created based on the optimum spanloads and the experiments were conducted to evaluate the changes in drag as the design constraints differed. The results indicate that an optimized spanload having equal lift and wing-root bending moment to that of an elliptically-loaded wing can experience significant decreases in drag. Comparisons between the theoretical predictions and the wind-tunnel models were made using experimental 5-hole probe wake-survey measurements, which were reduced into total lift and drag, as well as spanwise lift distributions.","abstract_has_math":false,"creators":["Wroblewski, Gabrielle E"],"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":2016,"date_issued":"2016-07-07T19:58:15Z","date_published":"2016-07-07T19:58:15Z","updated_at":"2026-07-22T22:26:34Z","subjects":["multidisciplinary design optimization","wake survey method"],"languages":["en"],"rights":["Copyright 2016 Gabrielle Wroblewski"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/90675","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":["Wroblewski, Gabrielle E"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2016-07-07T19:58:15Z","2016-04-28","2016-05"]},{"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":["multidisciplinary design optimization","wake survey method"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2016 Gabrielle Wroblewski"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/90675"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Optimum wing spanloads were evaluated by comparing wing performance values from theoretical predictions and experimental wind-tunnel measurements. The optimum spanloads were found using a Lagrange multiplier optimization method. They were designed with a prescribed wing-root bending moment constraint with and without incorporating viscous representation. Wind-tunnel models were created based on the optimum spanloads and the experiments were conducted to evaluate the changes in drag as the design constraints differed. The results indicate that an optimized spanload having equal lift and wing-root bending moment to that of an elliptically-loaded wing can experience significant decreases in drag. Comparisons between the theoretical predictions and the wind-tunnel models were made using experimental 5-hole probe wake-survey measurements, which were reduced into total lift and drag, as well as spanwise lift distributions.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2016-07-07 without embargo terms","The student, Gabrielle Wroblewski, accepted the attached license on 2016-04-27 at 09:31.","The student, Gabrielle Wroblewski, submitted this Thesis for approval on 2016-04-27 at 09:37.","This Thesis was approved for publication on 2016-04-28 at 08:38.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9539 on 2016-07-07 at 13:33:38","Made available in DSpace on 2016-07-07T19:58:15Z (GMT). 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Wind-tunnel models were created based on the optimum spanloads and the experiments were conducted to evaluate the changes in drag as the design constraints differed. The results indicate that an optimized spanload having equal lift and wing-root bending moment to that of an elliptically-loaded wing can experience significant decreases in drag. Comparisons between the theoretical predictions and the wind-tunnel models were made using experimental 5-hole probe wake-survey measurements, which were reduced into total lift and drag, as well as spanwise lift distributions.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2016-07-07 without embargo terms","The student, Gabrielle Wroblewski, accepted the attached license on 2016-04-27 at 09:31.","The student, Gabrielle Wroblewski, submitted this Thesis for approval on 2016-04-27 at 09:37.","This Thesis was approved for publication on 2016-04-28 at 08:38.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9539 on 2016-07-07 at 13:33:38","Made available in DSpace on 2016-07-07T19:58:15Z (GMT). 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