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原文传递 A CFD study of jet mixing in reduced flow areas for lower combustor emissions

题名：	A CFD study of jet mixing in reduced flow areas for lower combustor emissions
作者：	Smith, C. E.; Talpallikar, M. V.; Holdeman, J. D.
关键词：	emission；reduce；areas；study；flow；combustion；applications；pressure；correlation；temperature
摘要：	The Rich-burn Quick-mix Lean-burn (RQL) combustor has the potential of significantly reducing NO(x) emissions in combustion chambers of High Speed Civil Transport aircraft. Previous work on RQL combustors for industrial applications suggested the benefit of necking down the mixing section. A 3-D numerical investigation was performed to study the effects of neckdown on NO(x) emissions and to develop a correlation for optimum mixing designs in terms of neckdown area ratio. The results of the study showed that jet mixing in reduced flow areas does not enhance mixing, but does decrease residence time at high flame temperatures, thus reducing NO(x) formation. By necking down the mixing flow area by 4, a potential NO(x) reduction of 161 is possible for annual combustors. However, there is a penalty that accompanies the mixing neckdown reduced pressure drop across the combustor swirler. At conventional combustor loading parameters, the pressure drop penalty does not appear to be excessive.
报告类型：	科技报告