氨/空气在多孔介质表面燃烧的实验研究  

Experimental investigation of ammonia/air surfacecombustion at porous media burners

作　　者：李可可 梁吉轲 陈冕 孟旭 谢兴华[1] 香开新 方世东 LI Ke-ke;LIANG Ji-ke;CHEN Mian;MENG Xu;XIE Xing-hua;XIANG Kai-xin;FANG Shi-dong(School of Chemical and Blasting Engineering,Anhui University of Science&Technology,Huainan 232001,China;Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230031,China;Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]安徽理工大学化工与爆破学院,安徽淮南232001 [2]合肥综合性国家科学中心能源研究院,安徽合肥230031 [3]中国科学院合肥物质科学研究院,安徽合肥230031

出　　处：《河南城建学院学报》2025年第2期72-79,共8页Journal of Henan University of Urban Construction

基　　金：合肥综合性国家科学中心能源研究院(安徽省能源实验室)协同创新资助项目(GXXT-2022-026)。

摘　　要：为探究氨/空气多孔介质燃烧及其排放特性,利用碳化硅泡沫陶瓷构成的多孔介质燃烧器研究氨气流量、当量比、碳化硅材料孔密度对火焰形态、温度分布、可燃极限及NOx排放的影响。结果表明:当量比的改变使表面燃烧火焰形态发生显著变化,在当量比φ为1.0时,火焰紧贴碳化硅多孔介质表面燃烧。多孔介质孔密度和氨气流量通过影响多孔介质表面的燃气出口流速,使火焰燃烧强度发生变化,继而影响火焰的温度分布。表面燃烧火焰的贫燃和富燃极限当量比分别约为0.6和1.4,可燃极限随碳化硅孔密度的增加而轻微拓宽,随氨气流量的增加而逐渐减小。随当量比或碳化硅孔密度的增加,NOx排放在贫燃侧显著减少,在富燃侧轻微降低并取得最低排放值,约为10 ppm。In order to investigate the combustion and emission characteristics of ammonia/air at porous media burners composed of silicon carbide foam ceramics,the effects of ammonia flow,equivalence ratio and pore density of silicon carbide materials on flame structure,temperature distribution,flammability limit and NOx emissions were studied.The results show that the change of equivalence ratio makes the surface combustion flame shape change significantly.When the equivalence ratioφis 1.0,the flame burns in close contact with the surface of the silicon carbide porous medium.The pore density of porous media and the flow rate of ammonia gas affect the gas outlet velocity on the surface of porous media,which changes the flame combustion intensity and then affects the difference of flame temperature distribution.The lean and rich limit equivalence ratio of the surface flame is approximately 0.6 and 1.4,respectively.The flammability limit slightly broadens with the increase of silicon carbide pore density,and gradually decreases with the increase of ammonia flow rate.With the increase of equivalence ratio or silicon carbide pore density,NOx emission decreases significantly in lean conditions,and decreases slightly in rich conditions,achieving its minimum emission of about 10 ppm.

关 键 词：氨燃料 多孔介质 表面燃烧 当量比 燃烧特性 NOX排放 

分 类 号：TK16[动力工程及工程热物理—热能工程]