{"id":16463,"date":"2024-04-26T14:26:12","date_gmt":"2024-04-26T14:26:12","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=16463"},"modified":"2024-04-26T14:26:12","modified_gmt":"2024-04-26T14:26:12","slug":"quantifying-the-surface-heat-transfer-on-transpiration-cooled-porous-materials-in-laminar-and-turbulent-hypersonic-boundary-layers","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/04\/26\/quantifying-the-surface-heat-transfer-on-transpiration-cooled-porous-materials-in-laminar-and-turbulent-hypersonic-boundary-layers\/","title":{"rendered":"Quantifying the Surface Heat Transfer on Transpiration Cooled Porous Materials in Laminar and Turbulent Hypersonic Boundary Layers"},"content":{"rendered":"\n<p><strong>Imran Naved, Tobias Hermann, Chris Hambidge, Hassan Saad Ifti, Matthew McGilvray, Iullia S Tirichenko, Luc Vandeperre<\/strong><\/p>\n\n\n\n<p><strong>DOI Number XXX-YYY-ZZZ<\/strong><\/p>\n\n\n\n<p><strong>Conference Number HiSST-2022-440<\/strong><\/p>\n\n\n\n<p>The design of a transpiration cooled system requires detailed local heat transfer information on and in the<br>vicinity of the porous injector\u037e however, limited spatially resolved experimental studies exist, particularly<br>in hypersonic flows. In this work experiments were conducted on a flat plate model in the Oxford High<br>Density Tunnel at Mach 6.1 in both laminar and turbulent regimes. Spatially resolved 2D surface heat<br>transfer measurements were acquired by imaging directly on and downstream of two micro-porous transpiration cooled injectors (METAPOR CE170 and Zirconia) using high-speed infra-thermography. Whilst<br>injection in the laminar regime results in a steady, monotonic reduction in heat transfer from the start<br>of the injector, a flatter profile is present for the turbulent cases where turbulent mixing inhibits surface<br>heat transfer reduction. It was found that a modification to existing relations from film theory successfully correlates the stream-wise heat transfer distribution on the injector for different blowing rates<br>of Nitrogen and Helium injection. A key result is that Helium performs much better than reported in<br>previous experiments for a turbulent boundary layer.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/HiSST-2022-440.pdf\" data-type=\"link\" data-id=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/HiSST-2022-440.pdf\">Read the full paper ><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b> Imran Naved, Tobias Hermann, Chris Hambidge, Hassan Saad Ifti, Matthew McGilvray, Iullia S Tirichenko, Luc Vandeperre <\/b><\/p>\n<p>DOI Number XXX-YYY-ZZZ<\/p>\n<p>Conference Number HiSST-2022-440<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1008,1006],"tags":[502,440,1369,1370,500,1371],"class_list":["post-16463","post","type-post","status-publish","format-standard","hentry","category-high-speed-aerodynamics-and-aerothermodynamics-hisst-2022","category-hisst-2022","tag-flat-plate","tag-hypersonic","tag-infra-red","tag-laminar","tag-transpiration-cooling","tag-turbulent","category-1008","category-1006","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16463","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/comments?post=16463"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16463\/revisions"}],"predecessor-version":[{"id":16464,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16463\/revisions\/16464"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=16463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=16463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=16463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}