An experimental study of n-dodecane and the development of an improved kinetic model
An experimental study of n-dodecane and the development of an improved kinetic model
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正十二烷的实验研究和改进动力学模型的开发
DOI：
10.1016/j.combustflame.2019.11.014
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发表时间：
2020-02-01
影响因子：
4.4
通讯作者：
Lu, Xingcai
中科院分区：
文献类型：
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作者：
Mao, Yebing;Raza, Mohsin;Lu, Xingcai
这项工作提供了新的基本燃烧实验数据，并提出了一个改进的正十二烷动力学模型，正十二烷是一种广泛用于喷气燃料和柴油的替代组分。在实验中，采用加热快速压气机(RCM)和加热激波管(ST)相结合的方法，测量了正十二烷在低至高温范围内的着火延迟时间。测量范围包括温度(621-1320 K)、压力(8，15巴)和当量比(0.5-1.5)。在600-1100K温度范围内，当量比为0.5、1.0和1.5的常压下进行了流动反应器氧化，得到了O-2、CO、CO2、CH4、C2H4等物种的演化曲线，并利用这些数据建立了正十二烷的反应机理。从最近的文献中采用了新的速率系数来改进模型的性能，得到了一个由737个物种和3629个反应组成的模型。目前的实验数据以及文献中广泛使用的数据集被用来评估该模型的性能。结果表明，预测结果与实验结果基本吻合。该模型有望促进喷气燃料替代物动力学模型的开发。(C)2019年燃烧研究所。爱思唯尔公司出版，版权所有。
This work presents new fundamental combustion experimental datasets and propose an improved kinetic model for n-dodecane, a widely used surrogate component for jet fuels and diesel. In the experiments, ignition delay times for n-dodecane, were measured over low-to-high temperature range by combining a heated rapid compression machine (RCM) and a heated shock tube (ST). The measurements cover a wide range of temperatures (621-1320 K), pressures (8, 15 bar) and equivalence ratios (0.5-1.5). Flow reactor oxidation was also carried out over temperature range of 600-1100 K and at equivalence ratios of 0.5, 1.0 and 1.5 under atmospheric pressure to provide species evolution profiles of O-2, CO, CO2 CH4, C2H4 etc. These datasets were used to develop a mechanism for n-dodecane. New rate coefficients were adopted from recent literature to improve the performance of the model, leading to a model composed of 737 species and 3629 reactions. The present experimental data, as well as a wide range of datasets in literature, were used to evaluate the performance of the model. An overall good agreement of the predictions with the experimental results was observed. This model is anticipated to facilitate the development of kinetic models for jet fuel surrogate. (C) 2019 The Combustion Institute. Published by Elsevier Inc. All rights reserved.