{"id":22619,"date":"2025-10-22T12:22:53","date_gmt":"2025-10-22T12:22:53","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=22619"},"modified":"2025-10-22T12:22:54","modified_gmt":"2025-10-22T12:22:54","slug":"shape-optimization-of-an-air-turbo-rocket-hydrogen-turbine-for-off-design-performance-assessments","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2025\/10\/22\/shape-optimization-of-an-air-turbo-rocket-hydrogen-turbine-for-off-design-performance-assessments\/","title":{"rendered":"Shape Optimization of an Air Turbo Rocket Hydrogen Turbine for Off-Design Performance Assessments"},"content":{"rendered":"\n<p><strong>Samuele Gatto, Karel Van den Borre, Bayindir H. Saracoglu<\/strong><\/p>\n\n\n\n<p><strong>DOI Number: N\/A<\/strong><\/p>\n\n\n\n<p><strong>Conference number: HiSST-2025-267<\/strong><\/p>\n\n\n\n<p>Reliable and efficient propulsion systems are critical for advancing civil hypersonic transportation. Air Turbo-Rocket (ATR) engines provide high specific thrust and impulse across a broad range of altitudes and Mach numbers, making them particularly effective for the acceleration phase. Furthermore, Expander-type ATRs extend the operational range by isolating the turbine from the hot airflow path associated with high flight Mach numbers, lifting a thermal constraint. Decoupling the turbine from the airflow path increases degrees of operational freedom. However, it leads to a more extensive variety of operating conditions in the turbines, making conventional scaling procedures for publicly available<br>turbine performance maps impractical. This work performs a multi-fidelity design and optimisation of a hydrogen turbine to expand its feasible operational envelope. The approach combines a low-fidelity mean-line design with empirical loss correlations, which feeds a high-fidelity CFD optimisation using the in-house CADO optimisation. The optimised turbine geometry is evaluated across multiple operating conditions to generate a turbine performance map that is useable in thermodynamic engine simulations.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2025\/10\/HISST2025_267_paper.pdf\">Read the full paper here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Samuele Gatto, Karel Van den Borre, Bayindir H. Saracoglu<\/b><\/p>\n<p>DOI Number: N\/A<\/p>\n<p>Conference number: HiSST-2025-267<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[993,3362,3361],"tags":[3493,3495,624,3494,3496],"class_list":["post-22619","post","type-post","status-publish","format-standard","hentry","category-events","category-high-speed-missions-and-vehicles-1-hisst-2025","category-1-hisst-2025","tag-air-turbo-rocket-2","tag-differential-evolution","tag-hydrogen","tag-mean-line-design","tag-shape-optimisation","category-993","category-3362","category-3361","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/22619","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=22619"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/22619\/revisions"}],"predecessor-version":[{"id":22621,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/22619\/revisions\/22621"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=22619"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=22619"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=22619"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}