滑动弧辅助甲烷/氨旋流火焰的稳燃和排放特性  

Stabilization and NOx Emission of Gliding Arc-assisted CH4/NH3 Swirl Flames

作　　者：孙锦国 黄骞[1] 张易阳[2] 杨远平 李水清[1] SUN Jinguo;HUANG Qian;ZHANG Yiyang;YANG Yuanping;LI Shuiqing(Key Laboratory for Thermal Science and Power Enginering of Ministryr of Education,Tsinghua University,Beijing 100084,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京100084 [2]清华大学核能与新能源技术研究院,北京100084

出　　处：《工程热物理学报》2022年第8期2234-2241,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51725601,No.52006121)。

摘　　要：本文针对滑动弧等离子体辅助下的甲烷/氨气/空气预混旋流火焰,研究了其燃烧稳定性以及NO_(x)排放特性。研究结果表明,滑动弧不仅能够大幅拓展甲烷/氨气/空气预混旋流火焰的贫燃吹熄极限(在开放空间和受限空间中,贫燃吹熄极限分别从0.60~0.80拓宽到0.30),同时能够降低NO_(x)排放量。随后,通过NH_(2)^(*)化学自发光的光学测量,分析了滑动弧等离子体降低NO_(x)排放的可能机理。In this paper, the flame stabilization and NO_(x)xemissions of CH_(4)/NH_(3)/air premixed swirl flame assisted by the gliding arc plasma are studied. The results show that the gliding arc can not only greatly expand the lean blowout limits of CH_(4)/NH_(3)/air premixed swirl flame(in the unconfined and the confined cases, the lean blowout limit are extended from 0.60~0.80 to 0.30, respectively), but also reduce NO_(x)emissions. Subsequently, the possible mechanism of gliding arc plasma to reduce NO_(x)emissions was analyzed through the optical measurement of NH_(2)^(*)chemiluminescence.

关 键 词：滑动弧等离子体 甲烷/氨气预混旋流火焰 吹熄极限 NO_(x)排放特性 NH_(2)^(*)化学自发光 

分 类 号：TK123[动力工程及工程热物理—工程热物理]