{"id":18444,"date":"2024-11-18T15:24:30","date_gmt":"2024-11-18T15:24:30","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=18444"},"modified":"2024-11-18T15:24:31","modified_gmt":"2024-11-18T15:24:31","slug":"unsteady-and-post-stall-aerodynamic-modeling-for-aircraft-dynamics-simulation","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/11\/18\/unsteady-and-post-stall-aerodynamic-modeling-for-aircraft-dynamics-simulation\/","title":{"rendered":"UNSTEADY AND POST-STALL AERODYNAMIC MODELING FOR AIRCRAFT DYNAMICS SIMULATION"},"content":{"rendered":"\n<p><strong>Ryan C. Paul, Joseba Murua, Ashok Gopalarathnam<\/strong><\/p>\n\n\n\n<p><strong>DOI Number: N\/A<\/strong><\/p>\n\n\n\n<p><strong>Conference number: IFASD-2015-070<\/strong><\/p>\n\n\n\n<p>By extending an unsteady vortex lattice method with a decambering approach to handle stall, a modeling environment has been developed for \ufb02ight dynamics analysis of rigid aircraft in preand post-stall conditions, with possible future extensions to include structural \ufb02exibility. The combined equations for vortex-lattice analysis, rigid-body \ufb02ight dynamics, and decambering stall model are integrated for semi-analytical analysis of the coupled system. The resulting framework allows for performing aircrafttrim calculations in both pre-stall and post-stall conditions. Linearization about the trim condition leads to a state-space form, with states including vortex-lattice and \ufb02ightdynamic variables. The decambering variable for each section is introduced in the system matrices as a control variable, whose value is linearly related to the changes in \ufb02ight velocities. Eigenvalue analysis of the resulting system matrix yields the \ufb02ight dynamic modes. Results for loss of roll damping with increase in angle of attack beyond stall show excellent agreement with high-alpha data from \ufb02ight-test results in the literature. Full-aircraft results for all \ufb02ight modes are veri\ufb01ed for pre-stall conditions. At post-stall conditions, the full-aircraft predictions for some modes are in broad agreement with the limited general trends that could be found in the literature.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2024\/11\/IFASD-2015-070.pdf\">Read the full paper here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Ryan C. Paul, Joseba Murua, Ashok Gopalarathnam<\/b><\/p>\n<p>DOI Number: N\/A<\/p>\n<p>Conference number: IFASD-2015-070<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2413,2416],"tags":[2104,2309,2080,2001,2098],"class_list":["post-18444","post","type-post","status-publish","format-standard","hentry","category-1-ifasd-2015","category-aerodynamics-cfd","tag-ight-dynamics","tag-potential-ow","tag-stall","tag-unsteady-aerodynamics","tag-vortex-lattice-method","category-2413","category-2416","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/18444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/comments?post=18444"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/18444\/revisions"}],"predecessor-version":[{"id":18446,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/18444\/revisions\/18446"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=18444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=18444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=18444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}