首页> 外文期刊>Combustion Science and Technology >AUTOIGNITION OF n-DECANE-BUTYLBENZENE-PROPYLCYCLOHEXANE MIXTURES AND THE EFFECTS OF THE EXHAUST GAS RECIRCULATION
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AUTOIGNITION OF n-DECANE-BUTYLBENZENE-PROPYLCYCLOHEXANE MIXTURES AND THE EFFECTS OF THE EXHAUST GAS RECIRCULATION

机译:正癸烷/正丁基苯/正丙基环己烷混合气的自发性和排气再循环的作用

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摘要

In the present work, the autoignition of single-component and binary mixtures composed of n-decane, n-butylbenzene, and/or n-propylcyclohexane has been investigated using shock-tube techniques. In addition, the effects of the presence of the exhaust gas recirculation (EGR) components on the autoignition behavior of a 4:3:3 molar n-decane: n-butylbenzene:n-propylcyclohexane surrogate mixture have been investigated experimentally. The experiments have been performed at highly diluted conditions in argon bath gas, over a wide range of temperatures (1250-1750 K), equivalence ratios (Φ = 0.2-1.5), and nominal pressures of 10-20 bar. A chemical kinetic model was developed to simulate the newly obtained experimental data by blending sub-models from the literature. In particular, the experimental and numerical analyses suggest that the observed increase in the ignition delay times in the presence of EGR is mainly due to the dilution levels and not to the chemistry of the fuel. Additional kinetic analyses were performed to compare the high-temperature autoignition properties of the different components considered herein.
机译:在目前的工作中,已经使用冲击管技术研究了由正癸烷,正丁基苯和/或正丙基环己烷组成的单组分和二元混合物的自燃。另外,已经通过实验研究了排气再循环(EGR)成分的存在对摩尔比为4:3:3的正癸烷:正丁基苯:正丙基环己烷替代混合物的自燃行为的影响。实验是在高度稀释的条件下,在氩浴气体中,宽范围的温度(1250-1750 K),当量比(Φ= 0.2-1.5)和标称压力10-20 bar的条件下进行的。通过混合文献中的子模型,开发了一种化学动力学模型来模拟新获得的实验数据。特别地,实验和数值分析表明,在存在EGR的情况下,观察到的点火延迟时间的增加主要是由于稀释水平而不是燃料的化学性质。进行了额外的动力学分析,以比较本文考虑的不同组分的高温自燃特性。

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