{"id":18076,"date":"2024-08-22T08:13:19","date_gmt":"2024-08-22T08:13:19","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=18076"},"modified":"2024-08-22T08:13:20","modified_gmt":"2024-08-22T08:13:20","slug":"numerical-investigation-of-self-sustained-limit-cycle-oscillations-in-a-flapping-foil-energy-harvester","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/08\/22\/numerical-investigation-of-self-sustained-limit-cycle-oscillations-in-a-flapping-foil-energy-harvester\/","title":{"rendered":"NUMERICAL INVESTIGATION OF SELF-SUSTAINED LIMIT-CYCLE OSCILLATIONS IN A FLAPPING-FOIL ENERGY HARVESTER"},"content":{"rendered":"\n<p><strong>Enhao Wang, Kiran Ramesh, Ignazio Maria Viola, Shaun Killen<\/strong><\/p>\n\n\n\n<p><strong>DOI Number: N\/A<\/strong><\/p>\n\n\n\n<p><strong>Conference number: IFASD-2017-162<\/strong><\/p>\n\n\n\n<p>Two-degree-of-freedom (2DOF) fully passive motion of a \ufb02apping foil at a low Reynolds number Re = 10,000 is studied numerically. The simulations are conducted using open source computational \ufb02uid dynamics (CFD) toolbox OpenFOAM. The present research is mainly focused on the self-sustained limit-cycle oscillations of a \ufb02apping foil with potential application as a hydro-energy harvester. The effect of different parameters on the onset of linear \ufb02utter, the characteristics of the system response, the available power from a \ufb02apping foil and the \ufb02ow patterns are investigated. It is found that given a small initial perturbation, the response of the foil is similar to that of classical linear \ufb02utter i.e., the oscillations converged to a constant value at reduced velocities lower than the \ufb02utter velocity and limit-cycle oscillations (LCOs) are observed once the reduced velocities are greater than the \ufb02utter velocity. The reduced frequency of the LCOs exhibits a decreasing trend with increasing reduced velocity. In contrast, the phase difference between pitch and plunge increases with the increase of the reduced velocity. The feasibility of power extraction is demonstrated and the time-averaged power shows a single peak at an intermediate reduced velocity. Limit-cycle oscillations are found to be in\ufb02uenced by leading-edge vortex shedding as well as trailing-edge \ufb02ow separation. <\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2024\/08\/IFASD-2017-162.pdf\">Read the full paper here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Enhao Wang, Kiran Ramesh, Ignazio Maria Viola, Shaun Killen<b\/><\/p>\n<p>DOI Number: N\/A<\/p>\n<p>Conference number: IFASD-2017-162<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[993,1953,1964],"tags":[442,2271,2272,2270,2267],"class_list":["post-18076","post","type-post","status-publish","format-standard","hentry","category-events","category-ifasd-2017","category-steady-unsteady-aerodynamics","tag-cfd","tag-apping-wings","tag-uid-structure","tag-interaction-energy-harvesting","tag-leading-edge-vortices","category-993","category-1953","category-1964","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/18076","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=18076"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/18076\/revisions"}],"predecessor-version":[{"id":18078,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/18076\/revisions\/18078"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=18076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=18076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=18076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}