{"id":16431,"date":"2024-04-25T10:08:18","date_gmt":"2024-04-25T10:08:18","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=16431"},"modified":"2024-04-26T15:02:45","modified_gmt":"2024-04-26T15:02:45","slug":"transpiration-cooling-of-hypersonic-flow-past-a-flat-plate-with-porousinjection","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/04\/25\/transpiration-cooling-of-hypersonic-flow-past-a-flat-plate-with-porousinjection\/","title":{"rendered":"Transpiration Cooling of Hypersonic Flow Past a Flat Plate with PorousInjection"},"content":{"rendered":"\n<p><strong>Pushpender K. Sharma, Ralf Deiterding, Neil Sandham<\/strong><\/p>\n\n\n\n<p><strong>DOI Number XXX-YYY-ZZZ<\/strong><\/p>\n\n\n\n<p><strong>Conference Number HiSST-2022-421<\/strong><\/p>\n\n\n\n<p>The strategy of transpiration-based cooling is explored where the coolant is injected into the hypersonic<br>cross-flow using a porous layer, providing a gradual and more uniform distribution of the coolant into the<br>boundary layer and hence higher effectiveness. In the present numerical study, three-dimensional direct<br>numerical simulations of flow past a flat plate with a porous layer are conducted at M = 5. A conjugate<br>heat flux boundary condition is used as compared to a simpler isothermal wall. The coolant is injected<br>through a porous layer that is numerically represented as a staggered arrangement of spheres, which<br>requires the utilization of smaller pressure ratios similar to that in the corresponding actual experiments.<br>Also, to mimic the background disturbances intrinsic to the experiments, wall-bounded disturbances are<br>introduced upstream of the porous layer such that reasonable mixing of coolant is allowed inside the<br>hypersonic boundary layer. Flow transition is noted to play a critical role in the performance. It is noted<br>from the first set of moderately high injection Reynolds number cases that the lowest blowing ratio<br>results in more cooling immediately downstream of the porous layer, while the highest blowing ratio<br>shows overall best results, with highest cooling effectiveness even farther downstream among all the<br>blowing cases. For the second set of slightly higher injection Reynolds number cases, the trend is much<br>more monotonous, with increasing blowing ratios providing increasingly better effectiveness.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2024\/04\/HiSST-2022-421.pdf\">Read the full paper here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Pushpender K. Sharma, Ralf Deiterding, Neil Sandham<\/b><\/p>\n<p>DOI Number XXX-YYY-ZZZ<\/p>\n<p>Conference Number HiSST-2022-421<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[993,1009,1006],"tags":[1334,1333,1335,500],"class_list":["post-16431","post","type-post","status-publish","format-standard","hentry","category-events","category-high-speed-missions-and-vehicles-hisst-2022","category-hisst-2022","tag-high-speed-compressible-flows","tag-porous-layer","tag-transitional-flows","tag-transpiration-cooling","category-993","category-1009","category-1006","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16431","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=16431"}],"version-history":[{"count":2,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16431\/revisions"}],"predecessor-version":[{"id":16501,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16431\/revisions\/16501"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=16431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=16431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=16431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}