旋转滑动弧放电等离子体对氨气旋流火焰稳定性的影响  

Effect of Rotating Gliding Arc Discharge Plasma on Stability of Ammonia/Air Swirling Flames

作　　者：琚荣源 王金华[1] 穆海宝[2] 张冠军[2] 雷健平 于锦禄[3] 黄佐华[1] JU Rongyuan;WANG Jinhua;MU Haibao;ZHANG Guanjun;LEI Jianping;YU Jinlu;HUANG Zuohua(State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jlaotong University,XI'an 710049,China;State Key Laboratory of Elctrical Insulation and Power Equipment,Xi'an Jiaotong University,Xian 710049,China;School of Aeronautics Engineering,Air Force Engineering University,Xi'an 710038,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [3]空军工程大学航空工程学院,西安710038

出　　处：《工程热物理学报》2022年第8期2225-2233,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51776223);陕西省科技创新团队(No.2021TD-22);内蒙古自治区科技重大专项(No.2021ZD0021)。

摘　　要：本文实验研究了三维旋转滑动弧(RGA)放电等离子体对氨气旋流火焰稳定性的影响。实验表征了等离子体特征,测试了等离子体对氨气旋流火焰的助燃效果,研究了火焰形态特征的转变和OH自由基分布,揭示等离子体对氨气旋流火焰的助燃机理。结果表明,RGA放电等离子体可以作为点火源和火焰稳定器,能够提高火焰稳定性和拓展吹熄极限。另外较高流速下,火焰迟滞现象消失,在低流速下氨气火焰容易受到电场/等离子体的流体动力学不稳定性的影响。The effect of three-dimensional(3D) rotating gliding arc(RGA) discharge plasma on the stability of ammonia/air swirling flames is experimentally investigated. The properties of the plasma were characterized, and the combustion-supporting effect of the plasma was quantitatively studied. The flame stabilization mechanisms by plasma were revealed and analyzed according to the flame structure transition and the distribution of OH radicals. The results show that the RGA discharge plasma can be used as an ignition source and a flame stabilizer, and improve the flame stability and extend the lean blow-off limit. In addition, the flame hysteresis phenomenon disappears at high flow rates. Last, the ammonia flame is affected by the hydrodynamic instability of the electric field/plasma at low flow rates.

关 键 词：旋转滑动弧 放电特性 火焰结构 贫燃吹熄极限 

分 类 号：TK16[动力工程及工程热物理—热能工程]