湍流旋流氨气–甲烷预混火焰燃烧特性研究  

Study on Combustion Characteristics of Turbulent Rotating Ammonia-Methane Premixed Flame

作　　者：刘文锋 帅瑞洋 王平 钱伟佳 王永倩 杨证淳 张泽雨 Antonio Ferrante LIU Wenfeng;SHUAI Ruiyang;WANG Ping;QIAN Weijia;WANG Yongqian;YANGZhenchun;ZHANG Zeyu;Antonio Ferrante(Institute for Energy Research,Jiangsu University,Zhenjiang 212013,Jiangsu,China;State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310058,Zhejiang,China;Environmental Combustion Center Ltd,Via Milano,Gioia del Colle(BA)770023,Italy)

机构地区：[1]江苏大学能源研究院,镇江212013 [2]浙江大学能源清洁利用国家重点实验室,杭州310027 [3]能源与环境中心,Gioia del Colle(BA),意大利米兰70023

出　　处：《工程热物理学报》2024年第6期1598-1604,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.91741117);浙江大学能源清洁利用国家重点实验室开放基金(No.ZJUCEU2022020)。

摘　　要：为了研究NH_(3)-CH_(4)掺混燃气的燃烧特性,设计了一个可视化的旋流湍流燃烧装置,通过实验对当量比(Ф)、氨气掺混比(X_(NH_(3)))和入口空气流量对燃烧特性的影响进行分析。结果表明:随着当量比增加,燃烧室出口NO排放先增加后减小,在Ф=0.9时达到峰值,对其反应速率和燃烧光谱进行分析,发现NO_(2)和HNO浓度协同影响了NO的反应速率,NO排放和OH基强度呈正相关,NH_(2α)基和H_(2)O蒸气产生的链式反应促进了NO的还原。随着X_(NH_(3))升高,火焰由蓝色逐渐转变为橙黄色,NO排放先增加后减少,在X_(NH_(3))=0.4附近出现峰值。另外,随着入口空气流量的增加,气流速度增大导致湍流强度增大,贫燃状态下NO排放增加,而在富燃状态下排放减少,文中对其中机理进行了分析。A visualized turbulent swirling combustion device was designed to investigate the com-bustion characteristics of NH_(3)-CH_(4) mixture.The experiments focused on analyzing the impact of equivalence ratio,ammonia mixing ratio(X_(NH_(3))),and inlet air fow rate on the combustion pro-cess.The results indicated that as the equivalence ratio increased,nitrogen oxide(NO)emissions at the combustion chamber outlet first increased and then decreased,reaching a peak at Ф=0.9.Analysis of the combustion spectrum revealed that a positive correlation between NO emissions and OH radical intensity.Chain reactions generated by NH_(2α) radicals and water vapor promote the reduction of NO.Moreover,as X_(NH_(3)) increased,the flame transitioned from blue to orange-yellow,with NO emissions showing a similar trend of first increasing and then decreasing,peaking around X_(NH_(3))=0.4.Furthermore,NO emission was found to increase with inlet air flow rate during lean com-bustion but decrease it during rich combustion.The underlying mechanism for this phenomenon is analyzed.

关 键 词：氨气燃烧 旋流湍流火焰 一氧化氮排放 实验测量 燃烧特性 

分 类 号：TK16[动力工程及工程热物理—热能工程]