预燃式等离子体射流点火器的光谱特性实验  

Experimental Investigation on Spectral Characteristics of Pre-Combustion Plasma Jet Igniter

作　　者：田裕 于锦禄[1] 蒋永健 龙吟涛 王诗淋 程伟达 胡雅骥[1] Tian Yu;Yu Jinlu;Jiang Yongjian;Long Yintao;Wang Shilin;Cheng Weida;Hu Yaji(Aviation Engineering School,Air Force Engineering University,Xi’an 710038,China;Army Aviation Research Institute,Beijing 101100,China)

机构地区：[1]空军工程大学航空工程学院,西安710038 [2]陆军航空兵研究所,北京101100

出　　处：《燃烧科学与技术》2021年第5期562-568,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51776223,91741112).

摘　　要：作为当今世界上行之有效的先进点火方式,等离子体射流点火是航空航天以及稀薄燃烧领域极有前途的新课题.使用自行设计的预燃式等离子体射流点火器,以CH_(4)/空气混合气为工作介质进行了等离子体射流实验.为研究预燃式等离子体射流点火器的光谱特性,测量了点火器出口的发射光谱,计算了CN粒子的振动温度,研究了燃空比对点火射流光谱特性的影响.实验结果表明:预燃式等离子体射流点火器工作时会生成大量的活性粒子,活性粒子分布、数量、振动温度随点火射流的不同区域有明显变化;燃空比增大时,C_(3)、CH、OH和CN粒子的光谱发射强度呈现出先增加后减少的规律.As an effective and advanced ignition method worldwide at present,plasma jet ignition is a promising ignition technology in the aerospace and lean combustion fields.Through a self-designed pre-combustion plasma jet igniter,the plasma jet experiment was carried out with mixed methane-air as the working substance.To study the spectral characteristics of pre-ignition plasma jet igniter,the emission spectra at the outlet of the igniter were measured,the vibration temperature of CN particles was calculated,and the influence of fuel-air ratio on the spectral characteristics of ignition jet was studied.Experimental results show that a large number of active particles were produced when the pre-ignition plasma jet igniter worked.The distribution,number and vibration temperature of active particles varied significantly with the different regions of the ignition jet.The spectral emission intensity of C_(3),CH,OH and CN particles increased first and then decreased with the increase of fuel-air ratio.

关 键 词：预燃式点火器 等离子体射流 光谱特性 燃空比 振动温度 

分 类 号：V233.3[航空宇航科学与技术—航空宇航推进理论与工程]