{"id":53502,"date":"2021-03-17T08:53:55","date_gmt":"2021-03-17T08:53:55","guid":{"rendered":"\/forum\/forums\/topic\/pdf-table-calculation-yield-unrealistic-results-non-premixed-combustion\/"},"modified":"2021-03-17T08:53:55","modified_gmt":"2021-03-17T08:53:55","slug":"pdf-table-calculation-yield-unrealistic-results-non-premixed-combustion","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/pdf-table-calculation-yield-unrealistic-results-non-premixed-combustion\/","title":{"rendered":"PDF table calculation yield unrealistic results (non-premixed combustion)"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello everybody,<\/p>\n<p>I&#039;m trying to simulate a non-premixed combustion of C2H4 with N2O, but the results of my pdf table seem odd. The combustion takes place in a combustion chamber at around 23 bars with a convergent-divergent nozzle as exhaust. <\/p>\n<p>Problem 1: When I calculate the pdf table (with parameters hereunder), I get &quot;Warning! Rich Flammability Limit (0.192) is greater than double stochiometric (2 * 0.039)&quot;, which is not the correct stochiometric mixture fraction and moreover this value changes when I change the equilibrium operating pressure.<\/p>\n<p>Problem 2: When I display the pdf table (2D curve, mean temperature) for a constant value of the scaled heat loss\/gain, the results close to mixture fraction = 0 are incorrect. I joined an image to show this problem (index 6 for scaled variance). The problem can be better visualised on 3D curves, but it is hard to create a good image of this.<\/p>\n<div data-embedjson=\"{&quot;url&quot;:&quot;https:\/\/us.v-cdn.net\/6032193\/uploads\/S1TVN75D1XN9\/pdf-table-error.jpg&quot;,&quot;name&quot;:&quot;PDF_table_error.jpg&quot;,&quot;type&quot;:&quot;image\/jpeg&quot;,&quot;size&quot;:107297,&quot;width&quot;:1432,&quot;height&quot;:664,&quot;embedType&quot;:&quot;file&quot;}\">\n<a href=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/S1TVN75D1XN9\/pdf-table-error.jpg\" download aria-label=\"PDF_table_error.jpg\"><br \/>\nPDF_table_error.jpg<br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-53502","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["25820"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":["[???"],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["1094"],"_bbp_subscription":["233265"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["53502"],"_bbp_forum_id":["27792"],"_bbp_engagement":["118","187345"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["147672"],"_bbp_last_active_id":["147672"],"_bbp_last_active_time":["2021-03-23 13:08:33"]},"test":"bvh"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/53502","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\/53502\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=53502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}