{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/48916"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/48916","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Post stall propeller behavior at low Reynolds numbers","abstract":"Limited data exists for propeller and wind turbine post stall aerodynamics. Post stall aerodynamics was observed in small propellers at low Reynolds numbers. First, performance data (thrust, power, and efficiency) of set variable pitch propellers was acquired in a wind tunnel. The propellers were 6 to 9.9 inches in diameter and were able to pitch to extreme angles. Second detailed geometric characteristics (pitch, chord, airfoil) of the propellers were measured. Finally PROPID was used to simulate the propellers and predict the performance. Comparing the experimental and calculated results identified regions where post stall aerodynamics affected propeller performance. This understanding will assist in predicting post stall aerodynamics on small scale propellers. In addition three small propellers with tiplets similar to winglets on wings were tested and compared to traditionally tipped propellers. This comparison showed better designed traditional propellers were more efficient, but that tiplets improved performance of the specific propellers.","abstract_html":"Limited data exists for propeller and wind turbine post stall aerodynamics. Post stall aerodynamics was observed in small propellers at low Reynolds numbers. First, performance data (thrust, power, and efficiency) of set variable pitch propellers was acquired in a wind tunnel. The propellers were 6 to 9.9 inches in diameter and were able to pitch to extreme angles. Second detailed geometric characteristics (pitch, chord, airfoil) of the propellers were measured. Finally PROPID was used to simulate the propellers and predict the performance. Comparing the experimental and calculated results identified regions where post stall aerodynamics affected propeller performance. This understanding will assist in predicting post stall aerodynamics on small scale propellers. In addition three small propellers with tiplets similar to winglets on wings were tested and compared to traditionally tipped propellers. This comparison showed better designed traditional propellers were more efficient, but that tiplets improved performance of the specific propellers.","abstract_has_math":false,"creators":["Uhlig, Daniel V."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["Selig, Michael S."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-04-24T20:15:10Z","date_published":"2014-04-24T20:15:10Z","updated_at":"2026-07-22T22:25:38Z","subjects":["Post stall aerodynamics","propeller aerodynamics","low Reynolds number","stall delay"],"languages":["en"],"rights":["Copyright 2007 Daniel V. Uhlig"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/48916","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Selig, Michael S."]},{"key":"dc:creator","label":"Author","values":["Uhlig, Daniel V."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-04-24T20:15:10Z","2007"]},{"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":["Post stall aerodynamics","propeller aerodynamics","low Reynolds number","stall delay"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2007 Daniel V. Uhlig"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/48916"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Limited data exists for propeller and wind turbine post stall aerodynamics. Post stall aerodynamics was observed in small propellers at low Reynolds numbers. First, performance data (thrust, power, and efficiency) of set variable pitch propellers was acquired in a wind tunnel. The propellers were 6 to 9.9 inches in diameter and were able to pitch to extreme angles. Second detailed geometric characteristics (pitch, chord, airfoil) of the propellers were measured. Finally PROPID was used to simulate the propellers and predict the performance. Comparing the experimental and calculated results identified regions where post stall aerodynamics affected propeller performance. This understanding will assist in predicting post stall aerodynamics on small scale propellers. In addition three small propellers with tiplets similar to winglets on wings were tested and compared to traditionally tipped propellers. This comparison showed better designed traditional propellers were more efficient, but that tiplets improved performance of the specific propellers.","Submitted by Sarah Shreeves (sshreeve@illinois.edu) on 2014-04-24T20:15:10Z No. of bitstreams: 1 Uhlig-2007-Post_Stall_Propeller_Behavior.pdf: 25417856 bytes, checksum: 4ba0973cf88078a5941709741c968251 (MD5)","Made available in DSpace on 2014-04-24T20:15:10Z (GMT). No. of bitstreams: 1 Uhlig-2007-Post_Stall_Propeller_Behavior.pdf: 25417856 bytes, checksum: 4ba0973cf88078a5941709741c968251 (MD5) Previous issue date: 2007"]},{"key":"dc:title","label":"Title","values":["Post stall propeller behavior at low Reynolds numbers"]}]}],"canonical_facts":{"dc:contributor":["Selig, Michael S."],"dc:creator":["Uhlig, Daniel V."],"dc:date":["2014-04-24T20:15:10Z","2007"],"dc:description":["Limited data exists for propeller and wind turbine post stall aerodynamics. Post stall aerodynamics was observed in small propellers at low Reynolds numbers. First, performance data (thrust, power, and efficiency) of set variable pitch propellers was acquired in a wind tunnel. The propellers were 6 to 9.9 inches in diameter and were able to pitch to extreme angles. Second detailed geometric characteristics (pitch, chord, airfoil) of the propellers were measured. Finally PROPID was used to simulate the propellers and predict the performance. Comparing the experimental and calculated results identified regions where post stall aerodynamics affected propeller performance. This understanding will assist in predicting post stall aerodynamics on small scale propellers. In addition three small propellers with tiplets similar to winglets on wings were tested and compared to traditionally tipped propellers. This comparison showed better designed traditional propellers were more efficient, but that tiplets improved performance of the specific propellers.","Submitted by Sarah Shreeves (sshreeve@illinois.edu) on 2014-04-24T20:15:10Z No. of bitstreams: 1 Uhlig-2007-Post_Stall_Propeller_Behavior.pdf: 25417856 bytes, checksum: 4ba0973cf88078a5941709741c968251 (MD5)","Made available in DSpace on 2014-04-24T20:15:10Z (GMT). No. of bitstreams: 1 Uhlig-2007-Post_Stall_Propeller_Behavior.pdf: 25417856 bytes, checksum: 4ba0973cf88078a5941709741c968251 (MD5) Previous issue date: 2007"],"dc:identifier":["http://hdl.handle.net/2142/48916"],"dc:language":["en"],"dc:rights":["Copyright 2007 Daniel V. Uhlig"],"dc:subject":["Post stall aerodynamics","propeller aerodynamics","low Reynolds number","stall delay"],"dc:title":["Post stall propeller behavior at low Reynolds numbers"],"dc:type":["text"],"thesis:degree_discipline":["Aerospace Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:38Z"}