{"id":284730,"date":"2023-05-18T16:06:27","date_gmt":"2023-05-18T16:06:27","guid":{"rendered":"\/forum\/forums\/topic\/aircraft-engine-flow-exhaust\/"},"modified":"2023-05-18T16:06:27","modified_gmt":"2023-05-18T16:06:27","slug":"aircraft-engine-flow-exhaust","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/aircraft-engine-flow-exhaust\/","title":{"rendered":"Aircraft engine flow exhaust"},"content":{"rendered":"<p>Hi all,<\/p>\n<p>I&#8217;m trying to simulate the flow exhaust behavior of GE90-115b during the take-off of a B777-300ER. However, I&#8217;m facing several problems when defining the Boundary Conditions at the Inlet\/Outlet of the engines. Anyone knows what would be the most suitable BCs definition for this kind of case?<\/p>\n<p>The methods used are:<\/p>\n<ul>\n<li>Density Based Solver (DBNS) with 2nd order for all equations<\/li>\n<li>Compressible flow<\/li>\n<\/ul>\n<p>Input parameters:<\/p>\n<p><strong>Material:<\/strong> Air<\/p>\n<p><strong>Density<\/strong>: ideal-gas<\/p>\n<p><strong>Viscosity<\/strong>: Sutherland<\/p>\n<p><strong>Model:<\/strong> Realizable k-epsilon (2 equ.) w\/ Scalable Wall Functions<\/p>\n<p><strong>Operating Pressure<\/strong>: 101325 Pa<\/p>\n<p><strong>Boundary conditions:<\/strong><\/p>\n<p>Engine Inlet: Mass Flow Inlet (1713.9 kg\/s), Pabs (69562 Pa), Tabs: 259K<\/p>\n<p>Engine Outlet: Pressure Outlet at both Core and Bypass outlets (Core: 857K, 107096 Pabs; Bypass: 295K, 101325 Pa)<\/p>\n<p><strong>Solution method:<\/strong> Roe-FDS &#8211; Least square &#8211; 2nd order<\/p>\n<p><strong>Initialization method:<\/strong> Hybrid<\/p>\n<p>Any help would be very appreciated.<\/p>\n<p>Thanks!<\/p>\n","protected":false},"template":"","class_list":["post-284730","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["63182","13659","199"],"_bbp_author_ip":["23.39.172.22"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["574"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["284730"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","13659","63182"],"_bbp_voice_count":["3"],"_bbp_reply_count":["20"],"_bbp_last_reply_id":["285689"],"_bbp_last_active_id":["285689"],"_bbp_last_active_time":["2023-05-25 10:37:16"]},"test":"ricardo-pferreiraceiia-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/284730","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/284730\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=284730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}