{"id":16094,"date":"2024-04-12T09:09:23","date_gmt":"2024-04-12T09:09:23","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=16094"},"modified":"2024-04-12T09:09:23","modified_gmt":"2024-04-12T09:09:23","slug":"wall-pressure-stability-and-cooling-efficiency-analysis-in-a-transpiration-cooled-scramjet-model-combustor","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2024\/04\/12\/wall-pressure-stability-and-cooling-efficiency-analysis-in-a-transpiration-cooled-scramjet-model-combustor\/","title":{"rendered":"Wall Pressure Stability and Cooling Efficiency Analysis in a\u00a0\u00a0\u00a0\u00a0\u00a0 Transpiration-Cooled Scramjet Model Combustor"},"content":{"rendered":"\n<p><strong>Friedolin T. Strauss, Stephan General, Patrick A. Cragg, Stefan Schlechtriem<\/strong><\/p>\n\n\n\n<p><strong>DOI Number XXX-YYY-ZZZ<\/strong><\/p>\n\n\n\n<p><strong>Conference Number HiSST-2022-7<\/strong><\/p>\n\n\n\n<p>This publication presents the results of an ongoing investigation into transpiration cooling of scramjets<br>at the German Aerospace Center (DLR). It summarizes the shock-boundary layer interaction results and<br>the influence of this interaction on the systems\u2019 cooling efficiency and performance from more than<br>1000 hot run tests. Special focus is placed on the local static pressure distribution on the upper wall in<br>the coolant wake region. Furthermore, different flow interaction phenomena were discovered and are<br>thoroughly analyzed by the application of state of the art optical and non-intrusive measurement<br>techniques like Background Oriented Schlieren (BOS) combined with pressure and temperature data<br>analysis and correlations. The unique SBLI behavior of the coolant is addressed in this publication.<br>Three different porous wall materials made of sintered stainless steel are compared and analyzed in<br>terms of performance and sensitivity to shock-boundary layer interaction issues. It was found that the<br>shock generator generates a stronger geometric contraction in the hot gas main flow if positioned at<br>the downstream position. Thus, this position is more prone t generating shock trains and generates a<br>stronger impact on the static wall pressure distribution in the coolant wake region. It is proven in this<br>publication that the main drivers for influencing the static wall pressure distribution are the hot gas<br>mass flow rate (stagnation pressure more important than stagnation temperature) and the<br>impingement position of the shock generator\u2019s oblique shock. The static wall pressure distribution was<br>found to be mostly independent of the changes in static wall temperature and in cooling efficiency. An<br>outlook on the results of additional experiments using different types of porous media (e.g. ceramics)<br>and improved measurement techniques with the same coolants is also presented. Further research<br>requirements and subsequent changes in the test setup are discussed<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/HiSST-2022-7.pdf\" data-type=\"link\" data-id=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/HiSST-2022-7.pdf\">Read the full paper > <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Friedolin T. Strauss, Stephan General, Patrick A. Cragg, Stefan Schlechtriem<\/b><\/p>\n<p>DOI Number XXX-YYY-ZZZ<\/p>\n<p>Conference Number HiSST-2022-7<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[993,1006,1014],"tags":[1030,585,614,1029,500],"class_list":["post-16094","post","type-post","status-publish","format-standard","hentry","category-events","category-hisst-2022","category-testing-and-evaluation-hisst-2022","tag-gasdynamics","tag-ground-testing","tag-scramjet","tag-thermodynamics","tag-transpiration-cooling","category-993","category-1006","category-1014","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16094","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=16094"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16094\/revisions"}],"predecessor-version":[{"id":16095,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/16094\/revisions\/16095"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=16094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=16094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=16094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}