硝酸异丙酯/甲醇/空气混合物层流燃烧速度的数值模拟  

Numerical Simulation of Laminar Burning Velocity of Isopropyl Nitrate/Methanol/Air Mixtures

作　　者：孙悦 王宁 贾明正 李雪珂 SUN Yue;WANG Ning;JIA Mingzheng;LI Xueke(School of Automotive Engineering,Yellow River Traffic College,Jiaozuo 454000,Henan,China)

机构地区：[1]黄河交通学院汽车工程学院,河南焦作454000

出　　处：《能源研究与管理》2024年第1期104-111,共8页Energy Research and Management

基　　金：工程热力学教学资源库项目(HHJTXY-2021kczyk069);工程热力学一流课程项目(HHJTXY-2023ylkc19)。

摘　　要：为了探究硝酸异丙酯(isopropyl nitrate,IPN)对甲醇/空气混合物层流预混火焰反应活性的影响,利用Cantera开源动力学软件对IPN/甲醇/空气混合物的层流燃烧速度展开模拟计算,并对主要中间产物的浓度分布和敏感反应进行分析。结果表明:IPN的添加有助于甲醇/空气混合物燃烧时贫燃区活性自由基(H、O、OH等)的增多、HO_(2)惰性组分的减少、火焰温度的升高及层流燃烧速度的加快。当IPN掺混比例超过10%后,对甲醇层流燃烧速度的促进作用逐渐减弱,富燃区出现抑制影响。纯甲醇/空气混合物中,HCO基的第三体单分子裂解反应(R103:HCO+M=CO+H+M)对层流燃烧速度的敏感性最强。随着IPN添加,在贫燃区中CO+OH=CO_(2)+H变得更重要,H自由基(R9:H+HO_(2)=H_(2)+O_(2))和O自由基(R10:HO_(2)+O=O_(2)+OH)的消耗反应对反应活性的抑制作用减弱。CH3O基是连接甲醇和IPN消耗反应路径中的关键中间组分。To investigate the effect of isopropyl nitrate(IPN)on the reactivity of laminar premixed flames of methanol/air mixtures,the laminar burning velocity of IPN/methanol/air mixtures was simulated by using Cantera open-source dynamics software,and the concentration distribution of the main intermediates and the sensitive reactions were analyzed.The results showed that the addition of IPN contributed to the increase in the amount of reactive radicals such as H,O,OH,etc,the increase in flame temperature,the decrease in the inert component of HO_(2) and the acceleration of laminar burning velocity of the methanol/air mixture in the lean combustion zone.When the proportion of IPN blending exceeded 10%,the promotion of methanol laminar burning velocity gradually weakened,and the inhibitory effect appeared in the rich combustion zone.In pure methanol/air mixtures,the HCO-based third-body monomolecular cleavage reaction(R103:HCO+M=CO+H+M)was the most sensitive to the laminar burning velocity.With IPN addition,CO+OH=CO_(2)+H became more important in the depleted combustion zone,and the depletion reactions of H radicals(R9:H+HO_(2)=H_(2)+O_(2))and O radicals(R10:HO_(2)+O=O_(2)+OH)had a weakened inhibitory effect on the reactivity.CH3O radicals are the key intermediate components in the pathway connecting methanol and IPN depletion reactions.

关 键 词：硝酸异丙酯 甲醇 层流燃烧速度 Cantera 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]