{"id":13517,"date":"2023-10-26T19:00:49","date_gmt":"2023-10-26T19:00:49","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=13517"},"modified":"2024-03-29T11:28:06","modified_gmt":"2024-03-29T11:28:06","slug":"study-on-ramjet-mode-of-variable-geometry-rbcc-at-low-mach-number-via-full-flow-path-simulations","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2023\/10\/26\/study-on-ramjet-mode-of-variable-geometry-rbcc-at-low-mach-number-via-full-flow-path-simulations\/","title":{"rendered":"Study on ramjet mode of variable geometry RBCC at low Mach number via full flow path simulations"},"content":{"rendered":"\n<p><strong>Hongliang Pan , Jinying Ye\u00a0 , Fei Qin , Yajun Wang<\/strong><\/p>\n\n\n\n<p><strong>DOI Number XXX-YYY-ZZZ<\/strong><\/p>\n\n\n\n<p><strong>Conference Number HiSST 2018-28701121<\/strong><\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>The use of a structurally variable combustor is one of the most effective methods to improve the performance of a rocket-based combined-cycle (RBCC) engine over a wide operating range. This paper aims to study the matching between the combustor and the inlet\/exhaust of a variable geometry RBCC engine at low inflow Mach numbers, furthermore the paper focus on the feasibility of using a variable geometry combustor to carry out a steady secondary fuel combustion in a pure ramjet mode instead of in a rocket aided ramjet mode in order to improve the engine performance at low inflow Mach number stage. Under the inflow conditions of Ma 2 and Ma 3, the matching operating conditions between the combustor and the inlet\/exhaust are studied in detail based on the rocket-ramjet combustion mode. Different combustion organization methods show that the performance of the engine can be optimized by the fuel pylons concentrated injection under the Ma 3 inflow condition. By injecting secondary fuel in the isolator section, the transition of the engine from the rocket-ramjet mode to the pure ramjet mode is obtained in the variable geometry ram combustor. In the pure ramjet mode, the specific impulse of the engine is increased by 14.5% compared with in the rocket-ramjet mode, despite the ram specific impulse decreased by 10.2% due to a worsen combustion efficiency without rocket jet.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/hisst-2018_28701121.pdf\" data-type=\"link\" data-id=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2023\/10\/hisst-2018_28701121.pdf\">Read the full paper &gt; <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Hongliang Pan , Jinying Ye\u00a0 , Fei Qin , Yajun Wang<\/b><\/p>\n<p>DOI Number XXX-YYY-ZZZ<\/p>\n<p>Conference Number HiSST 2018-28701121<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[994,198,311,999],"tags":[434,864,468,865],"class_list":["post-13517","post","type-post","status-publish","format-standard","hentry","category-hisst-2018","category-hypersonic-aerodynamics","category-hypersonic-propulsion","category-materials-and-structures-hisst-2018","tag-hisst-2018","tag-ramjet-mode","tag-rbcc","tag-variable-geometry","category-994","category-198","category-311","category-999","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/13517","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=13517"}],"version-history":[{"count":2,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/13517\/revisions"}],"predecessor-version":[{"id":15835,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/13517\/revisions\/15835"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=13517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=13517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=13517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}