摘要
通过一台高压定容燃烧弹,以甲烷(CH_4)为燃料,研究了废气稀释和空气稀释对离子电流信号的影响.结果表明:废气稀释和空气稀释均会对离子电流信号和燃烧起到显著抑制作用,但废气稀释的抑制效果更为明显,且呈非线性.通过建立预混燃烧甲烷离子反应机理模型,对化学电离及热电离产物的形成过程及浓度进行了理论分析,结果表明:废气中的CO_2不会直接参与离子反应,但会通过降低反应物初始浓度和燃烧温度造成离子浓度降低,导致离子电流信号强度减弱.
The effect of exhaust gas dilution and air dilution on ion current signal was studied in a high-pressure constant volume combustion vessel fueled with methane. The results show that both the exhaust gas dilution and the air dilution have a significant inhibitory effect on the ion current signal and combustion,in which the exhaust gas dilution presents a stronger inhibition and non-linear effects. The formation process and concentration of the chemical ionization and thermal ionization products were analyzed by the established methane ionization reaction mechanism model.The analysis results from chemical reaction path show that the carbon dioxide does not directly participate in the ion reaction,but it can cause a reduction in the ion concentration,leading to a weakness in the ion current signal due to the decrease of the initial concentration of the reactants and the decrease of the combustion temperature.
作者
朱登豪
李超
黄昕
董光宇
邓俊
李理光
Zhu Denghao;Li Chao;Huang Xin;Dong Guangyu;Deng Jun;Li Liguang(School of Automotive Studies,Tongji University,Shanghai 200092,China;CDHK,Tongji University,Shanghai 200092,China)
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2019年第2期148-154,共7页
Transactions of Csice
基金
国家自然科学基金资助项目(51761135105)
KSPG教席基金资助项目
关键词
废气稀释
离子电流
反应机理
exhaust gas dilution
ion current
reaction mechanism
