{"id":16102,"date":"2024-04-12T09:21:18","date_gmt":"2024-04-12T09:21:18","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=16102"},"modified":"2024-04-12T09:21:19","modified_gmt":"2024-04-12T09:21:19","slug":"aerothermal-databases-and-heat-load-prediction-for-re-usable-launch-vehicle-configurations","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/04\/12\/aerothermal-databases-and-heat-load-prediction-for-re-usable-launch-vehicle-configurations\/","title":{"rendered":"Aerothermal Databases and Heat-Load Prediction for Re-Usable Launch Vehicle Configurations"},"content":{"rendered":"\n<p><strong>Sebastian Karl, J. Wilken, L.Bussler<\/strong><\/p>\n\n\n\n<p><strong>DOI Number XXX-YYY-ZZZ<\/strong><\/p>\n\n\n\n<p><strong>Conference Number HiSST-2022-18<\/strong><\/p>\n\n\n\n<p>Orbital launch vehicles with re-useable major components or stages provide the potential to decrease<br>the operational costs and to increase the flexibility of the entire system. DLR is conducting systematic<br>studies of such configurations. The present analyses focus on different vertical take-off two stage<br>systems which include a re-usable first stage. This stage is either configured for vertical landing using<br>retro-propulsion or horizontal landing as a winged configuration. The layout and system analysis of<br>such vehicles includes challenges related to the application of robust, light-weight, inexpensive and<br>serviceable thermal protection systems. The thermal protection design requires accurate predictions<br>of thermal loads for the entire atmospheric flight path. Due to the limitations and cost of ground<br>based testing for large scale vehicles and the difficulty to apply general fluid mechanical scaling laws,<br>these predictions rely intensively on numerical simulations (CFD). These CFD-based load predictions<br>need to be coupled with an analysis of the structural response (heating model). Because of the large<br>disparity of fluid mechanical and structural time scales, an unsteady CFD analysis over the entire<br>trajectory is practically impossible and fast-response surrogate models for the aerothermal loads are<br>required. This paper describes the structure and construction of such a model based on an<br>aerothermal database. The database is composed of a series of steady-state CFD results which cover<br>the entire atmospheric flight trajectory. Interpolation algorithms are used to estimate the local<br>heating rate on each point of the vehicle surface as a function of flight time and local surface<br>temperature. Particular challenges of the CFD analyses such as the plume-interactions during retropropulsion maneuvers or the heat flux scaling depending on the local wall temperature are addressed.<br>Exemplary applications and results of surface temperature predictions are shown.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/HiSST-2022-18.pdf\" data-type=\"link\" data-id=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/HiSST-2022-18.pdf\">Read the full paper > <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Sebastian Karl, J. Wilken, L.Bussler<\/b><\/p>\n<p>DOI Number XXX-YYY-ZZZ<\/p>\n<p>Conference Number HiSST-2022-18<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[993,1008,1006],"tags":[1043,442,546,1044],"class_list":["post-16102","post","type-post","status-publish","format-standard","hentry","category-events","category-high-speed-aerodynamics-and-aerothermodynamics-hisst-2022","category-hisst-2022","tag-aerothermodynamics","tag-cfd","tag-hypersonics","tag-retro-propulsion","category-993","category-1008","category-1006","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16102","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=16102"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16102\/revisions"}],"predecessor-version":[{"id":16103,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16102\/revisions\/16103"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=16102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=16102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=16102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}