同轴射流撞击火焰稳定性及光谱辐射特性研究  

Study on the Stability and Spectral Radiation Characteristics of Coaxial Jet Impinging Flame

作　　者：刘俊含 吴润民 宋旭东 白永辉 唐广军 于广锁 LIU Junhan;WU Runmin;SONG Xudong;BAI Yonghui;Tang Guangjun;YU Guangsuo(State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China;Shandong YankuangGuotuo Science&Engineering Co.,Ltd.,Jinan 250100,China;Institute of Clean Coal Technology,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,化学化工学院,银川750021 [2]山东兖矿国拓科技工程股份有限公司,济南250100 [3]华东理工大学洁净煤技术研究所,上海200237

出　　处：《工程热物理学报》2024年第12期3925-3935,共11页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.U21A20318,No.22108132);宁夏自然科学基金(No.2023AAC1001)。

摘　　要：基于光谱诊断技术对CH_(4)/O_(2)同轴射流撞击火焰进行研究,探究了不同扩散方式下撞击距离对甲烷燃烧火焰光谱辐射特性的影响,利用CH^(*)、OH^(*)对火焰形态进行表征。结果表明:撞击距离对反扩散火焰举升高度的影响较大。扩散火焰不出现举升状态,但出现离焰现象。撞击距离过小时,撞击发生在火焰核心区,火焰反应剧烈;撞击距离过大时,火焰撞击区内反应受到氧气流速、撞击距离及当量比影响无反应发生。反扩散火焰中,撞击距离对附着火焰峰值强度几乎无影响。扩散火焰峰值强度几乎不受峰撞击距离影响。OH*相较于CH*而言更适合表征甲烷–氧气撞击火焰内部的结构变化。Based on the spectral diagnosis technology,the CH4/O2 coaxial jet impact flame is studied,and the influence of the impact distance under different diffusion modes on the spectral radiation characteristics of methane combustion fame is explored,and the flame morphology is characterised by CH*and OH*.The results show that the impact distance has a great impact on the lifting height of the anti-diffusion flame.The diffuse fame does not appear in a lifting state,but there is a phenomenon of de-fame.If the impact distance is too small,the impact occurs in the core area of the flame,and the fame reaction is violent;when the impact distance is too large,the reaction in the flame impact area is not affected by the oxygen fow rate,the impact distance and the equivalent ratio.In the anti-diffusion flame,the impact distance has almost no effect on the peak strength of the attached flame.The peak strength of the diffusion fame is almost unaffected by the peak impact distance.Compared with CH*,OH*is more suitable for characterisation of the structural changes inside the methane-oxygen impact flame.

关 键 词：撞击火焰 撞击距离 稳定性 OH^(*)光谱辐射特性 CH^(*)光谱辐射特性 

分 类 号：O433.4[机械工程—光学工程]