{"id":456070,"date":"2026-04-08T17:53:44","date_gmt":"2026-04-08T17:53:44","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/74-hydrogen-injection-into-a-scramjet-combustion-chamber-at-mach-64\/"},"modified":"2026-04-08T17:53:44","modified_gmt":"2026-04-08T17:53:44","slug":"74-hydrogen-injection-into-a-scramjet-combustion-chamber-at-mach-64","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/74-hydrogen-injection-into-a-scramjet-combustion-chamber-at-mach-64\/","title":{"rendered":"74 Hydrogen injection into a scramjet combustion chamber at Mach 6.4"},"content":{"rendered":"<p>&lt;p&gt;I&#8217;m having problems with my Fluent setup. I&#8217;m simulating hydrogen combustion in a scramjet combustion chamber, where air enters at M = 2.01709 M at T = 1076.37 K and P = 90194.6 Pa with chemical properties of O = 0.21 N = 0.79. Hydrogen is injected at M = 1 at T = 250 K and P = 180707.4 Pa with chemical properties of H2 = 1. I&#8217;m running with the K-Kl-omega turbulence model. I created a structured mesh respecting Y+&lt; 1. When running with 50,000 initial iterations and plotting the hydrogen results, I noticed that there was no H2 injection. What could be going wrong with the setup?&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2026\/04\/08-04-2026-1775670683-mceclip2.png\" \/>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2026\/04\/08-04-2026-1775670666-mceclip1.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-456070","topic","type-topic","status-publish","hentry","topic-tag-k-model-1","topic-tag-Structuredmeshing-2","topic-tag-cfd-dem","topic-tag-error","topic-tag-simulation"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["456070"],"_bbp_subscription":["470017","629050"],"_bbp_author_ip":["200.134.18.34"],"_bbp_last_reply_id":["456086"],"_bbp_last_active_id":["456086"],"_bbp_last_active_time":["2026-04-08 20:36:21"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["470017","629050"],"_btv_view_count":["8"],"_bbp_topic_status":["unanswered"]},"test":"gianlucapaganialunos-utfpr-edu-br"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/456070","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\/456070\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=456070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}