{"id":16481,"date":"2024-04-26T14:41:26","date_gmt":"2024-04-26T14:41:26","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=16481"},"modified":"2024-04-26T14:41:27","modified_gmt":"2024-04-26T14:41:27","slug":"numerical-investigation-of-ground-heat-fluxes-from-supersonic-jet-impingement-during-vertical-landing-of-a-reusable-first-stage-demonstrator","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/04\/26\/numerical-investigation-of-ground-heat-fluxes-from-supersonic-jet-impingement-during-vertical-landing-of-a-reusable-first-stage-demonstrator\/","title":{"rendered":"Numerical Investigation of Ground Heat Fluxes from Supersonic Jet Impingement during Vertical Landing of a Reusable First Stage Demonstrator"},"content":{"rendered":"\n<p><strong>Moritz Ertl, Yannik Feldner, Tobias Ecker<\/strong><\/p>\n\n\n\n<p><strong>DOI Number XXX-YYY-ZZZ<\/strong><\/p>\n\n\n\n<p><strong>Conference Number HiSST-2022-35<\/strong><\/p>\n\n\n\n<p>Several actors in the space trasport sector are moving towards reusable launch vehicles (RLV) for the<br>first stages of launchers, among them SpaceX with the Falcon 9 [1] and Rocket Lab with the Neutron [2].<br>Also the current European long term strategy [3] is aiming towards reusability with plans for THEMIS [4]<br>and Ariane Next [5]. In accordance with this strategy the German Aerospace Center (DLR) has entered<br>into a collaboration with the Japan Aerospace Exploration Agency (JAXA) and the French Space Agency<br>(CNES) for the development of RLV relevant technologies in the frame of a vertical take\u00adoff and vertical<br>landing (VTVL) reusable subscale launcher first stage demonstrator \u00ad the \u201cCooperative Action Leading<br>to Launcher Innovation in Stage Toss back Operations\u201d (CALLISTO) [6, 7].<br>Generally a VTVL first stage will return to the launch pad utilising retro\u00adpropulsion and an Approach and<br>Landing System (ALS) [8] with deployable landing legs. The landing leads to new additional aerothermal<br>design questions compared to traditional launchers. It has been observed, that part of the critical heat<br>loads are happening after touch down and engine shut off. These are caused by heat radiation from the<br>launch pad to the vehicle structure. This can affect an ALS built from carbon fibre, which is prevented<br>from cooling down. The heat fluxes, therefore, influence the structural design and the thermal protection<br>system (TPS) of the ALS. The impact is even more relevant to experimental vehicles if hopper flights<br>are part of the program.<br>To aid the development of reusable launch vehicles in the VTVL configuration we analyse the heat fluxes<br>onto the ground for an impinging supersonic jet from a liquid hydrogen and oxygen engine. The analysis<br>is based on Reynolds averaged Navier\u00adStokes computational fluid dynamics. We look at some modelling<br>choices and we investigate the influence of the ground distance on the heat flux distribution.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/HiSST-2022-35.pdf\" data-type=\"link\" data-id=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/HiSST-2022-35.pdf\">Read the full paper > <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Moritz Ertl, Yannik Feldner, Tobias Ecker<\/b><\/p>\n<p>DOI Number XXX-YYY-ZZZ<\/p>\n<p>Conference Number HiSST-2022-35<\/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":[1388,442,1389,1390,475,1278,446,550],"class_list":["post-16481","post","type-post","status-publish","format-standard","hentry","category-high-speed-aerodynamics-and-aerothermodynamics-hisst-2022","category-hisst-2022","tag-aerothermal","tag-cfd","tag-ground-heat-flux","tag-jet-impingement","tag-rans","tag-retropropulsion","tag-reusable-launch-vehicle","tag-vtvl","category-1008","category-1006","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16481","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=16481"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16481\/revisions"}],"predecessor-version":[{"id":16482,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16481\/revisions\/16482"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=16481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=16481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=16481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}