CAJ | 학술논문

介质阻挡放电（dielectric barrier discharge,DBD）燃烧强化是等离子体技术领域发展起来的新的应用途径。在未燃烧的气体燃料或者可燃混合气体中进行DBD,利用放电产生的活性自由基,影响燃烧系统的化学平衡,进而达到改善燃料燃烧特性的目的。采用光谱仪分别对放电间隙和燃烧火焰进行光谱测量,并对燃烧的火焰形态进行记录。实验结果表明,甲烷放电后离解生成了CH基和H基,放电电压增加,CH基对应的光谱强度相应增加;放电处理后的甲烷燃烧火焰主要组成成分发生变化;在一定放电条件下,火焰产生回火现象。利用Fluent仿真软件研究了CH基和H基对甲烷燃烧的影响,仿真结果与实验结果吻合。研究认为甲烷燃烧特性的改善是DBD使甲烷离解生成的CH基和H基造成的。
개질조당방전（dielectric barrier discharge,DBD）연소강화시등리자체기술영역발전기래적신적응용도경。재미연소적기체연료혹자가연혼합기체중진행DBD,이용방전산생적활성자유기,영향연소계통적화학평형,진이체도개선연료연소특성적목적。채용광보의분별대방전간극화연소화염진행광보측량,병대연소적화염형태진행기록。실험결과표명,갑완방전후리해생성료CH기화H기,방전전압증가,CH기대응적광보강도상응증가;방전처리후적갑완연소화염주요조성성분발생변화;재일정방전조건하,화염산생회화현상。이용Fluent방진연건연구료CH기화H기대갑완연소적영향,방진결과여실험결과문합。연구인위갑완연소특성적개선시DBD사갑완리해생성적CH기화H기조성적。
Dielectric barrier discharge（DBD） enhanced combustion is a new application in plasma technology field.The active species in fuel or fuel air mixtures plasmas generated by DBD can influence the chemical kinetics of combustion and improve combustion properties considerably.In this paper,the emission spectrum of discharge area and flame was measured,and the flame structure was recorded.The experiment results showed that the radical of CH and H were produced by DBD in methane,and the optical emission spectrum line intensities of radical CH in the flame increased with voltage.Flash-back phenomenon was observed under some certain conditions.CFD software Fluent was used to investigate the effect of radicals of CH and H on methane combustion.And the simulation results agreed well with experiment results.It is concluded that the improvement of combustion property is contributed to radicals of CH and H produced by DBD in methane.