DMC/正庚烷着火延迟期的测量和化学反应动力学模型研究

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• 英文论文题名：Measurements and Chemical Kinetic Study on Ignition Delay Times of Dimethyl Carbonate and Dimethyl Carbonate/n-heptane Blends
• 论文作者：胡二江 ; 高振华 ; 陈毅臻 ; 黄佐华
• 英文论文作者：Erjiang Hu ; Zhenhua Gao ; Zuohua Huang ; State Key Laboratory of Multiphase Flow in Power Engineering ; Xi'an Jiaotong University
• 年：2016
• 作者机构：西安交通大学动力工程多相流国家重点实验室;
• 论文关键词：碳酸二甲酯/正庚烷 ; 着火延迟期 ; 化学反应动力学模型 ; 敏感性分析
• 会议召开时间：2016-07-01
• 会议录名称：中国化学会第30届学术年会摘要集-第四十六分会：燃烧化学
• 语种：中文
• 分类号：O643.21;O643.12
• 学会代码：ZGHY
• 会议名称：中国化学会第30届学术年会-第四十六分会 ; 燃烧化学
• 会议地点：中国辽宁大连
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：1
• 文件大小：272k
• 原文格式：D
• 会议级别：全国

摘要

本文利用激波管测量了碳酸二甲酯(DMC)和DMC/正庚烷混合燃料在不同压力、温度和当量比下的着火延迟期,并利用Chemkin软件和Glaude的DMC模型(Glaude Model)对预混合气着火过程进行模拟计算和化学反应动力学分析。结果表明,Glaude模型预测的着火延迟期明显高于实验测量值。通过对着火过程进行敏感性分析,对其反应速率常数进行了修正,修正后的模型(Mod Glaude Model)能够很好的预测DMC的着火延迟期。基于DMC/正庚烷的着火延迟期,构建了DMC/正庚烷的化学反应动力学模型。混合燃料的模型能够很好的模拟着火延迟期。
In this study, the ignition delay times of DMC and DMC/n-heptane were measured at different equivalence ratios, initial pressures, DMC fractions and fuel concentrations. Correlations of the measured ignition delay times were obtained. It is found that raising initial pressure, decreasing equivalence ratio, or increasing fuel concentration promote the ignition of DMC. The measured data were used to examine the existing chemical kinetic model and poor agreement was observed. Analogical method was applied to reevaluate certain reaction rate constants and modification was made to improve the performance of DMC model. The calculated results of the optimized model agree well with measured data of ignition delay times and mole fraction profiles of major species in opposed-flow diffusion flame. Comparison results suggested that the DMC/n-heptane blending model gives reasonable agreement with experimental results.

引文

[1]Glaude,P.A.;Pitz W.J.;Thomson M.J.Proc.Combust.Institute 2005,30(1):1111.
    [2]Chen G.;Yu W.;Fu J.;Mo J.;Huang Z.H.;Yang J.Z.;Wang Z.D.;Jin H.F.;Qi F.Combust.Flame 2012,159(7):2324.
    [3]Curran H.J.;Gaffuri P.;Pitz W.J.;Westbrook C.K.Combust Flame 1998,114:149-177.