{"id":17104,"date":"2024-06-05T09:40:07","date_gmt":"2024-06-05T09:40:07","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=17104"},"modified":"2025-09-15T12:42:44","modified_gmt":"2025-09-15T12:42:44","slug":"influence-of-spanwise-wall-vibration-on-bypass-transition-in-hypersonic-boundary-layers","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/06\/05\/influence-of-spanwise-wall-vibration-on-bypass-transition-in-hypersonic-boundary-layers\/","title":{"rendered":"Influence of Spanwise Wall-Vibration on Bypass Transition in Hypersonic Boundary Layers"},"content":{"rendered":"\n<p><strong>Qinyang SONG, Ming DONG, Lei ZHAO<\/strong><\/p>\n\n\n\n<p><strong>DOI Number: N\/A<\/strong><\/p>\n\n\n\n<p><strong>Conference number: HiSST-2024-223<\/strong><\/p>\n\n\n\n<p>Surface vibration, caused by either the mechanical action or the aeroelasticity, is a typical factor to<br>influence the boundary-layer transition over high-speed flying vehicles. This paper studies the evolution<br>of non-modal perturbations excited by low-frequency freestream vortical disturbances (FSVDs) in<br>hypersonic boundary layers with a spanwise vibrating wall. Under the framework of weakly nonlinear<br>theory, a high-fidelity numerical method based on the harmonic linearized Navier-Stokes equations is<br>developed to describe the boundary-layer response to the interaction of the FSVDs and the wall<br>vibration. When the non-modal perturbations accumulate to finite amplitude, the nonlinear parabolized<br>stability equations (NPSE) are employed to accommodate the nonlinear interaction among different<br>Fourier components, leading to the emergence of the secondary instability and eventually transition to<br>turbulence without the attendance of normal modes. It is found that the wall vibration would enhance<br>the strength of the streaks and the instability property of the secondary instability modes, leading to<br>premature of transition remarkably.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2024\/06\/HiSST-2024-223.pdf\">Read the full paper here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Qinyang SONG, Ming DONG, Lei ZHAO<\/b><\/p>\n<p>DOI Number: N\/A<\/p>\n<p>Conference number: HiSST-2024-223<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[993,1407,1411],"tags":[1747,1748,1315],"class_list":["post-17104","post","type-post","status-publish","format-standard","hentry","category-events","category-11-hisst-2024","category-hypersonic-fundamentals-and-history-11-hisst-2024","tag-boundary-layer-stability-2","tag-bypass-transition","tag-super-hypersonic-flow","category-993","category-1407","category-1411","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/17104","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=17104"}],"version-history":[{"count":2,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/17104\/revisions"}],"predecessor-version":[{"id":20776,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/17104\/revisions\/20776"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=17104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=17104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=17104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}