Measurements and kinetic study on the ignition delay time of dimethyl carbonate/n-heptane/oxygen/argon mixtures
Measurements and kinetic study on the ignition delay time of dimethyl carbonate/n-heptane/oxygen/argon mixtures
复制标题
碳酸二甲酯/正庚烷/氧气/氩气混合物着火延迟时间的测量及动力学研究
DOI：
10.1080/00102202.2017.1417271
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发表时间：
2018
影响因子：
1.9
通讯作者：
Zuohua Huang
中科院分区：
文献类型：
--
作者：
Zhenhua Gao;Erjiang Hu;Zhaohua Xu;Shihan Huang;Jinfeng Ku;Zuohua Huang
在激波管中研究了碳酸二甲酯 (DMC)/正庚烷混合物的点火延迟时间测量，温度范围为 1100–1600K，不同当量比 (0.5; 1.0; 2.0)，压力为 2.0 和 10.0 atm，燃料混合物中 DMC 的摩尔分数从 0% 到 100%（0%；2.0）不等。 20%；80%；100%）。构建了 DMC/正庚烷的详细模型来模拟纯燃料和混合燃料的点火过程。随着DMC添加量的增加，当量比对混合燃料点火延迟时间的影响越来越弱。进行反应路径分析来解释当量比效应。随着 DMC 添加量的增加，自由基池的浓度在较高温度下的积累阶段增加，导致反应系统中的化学反应性增强。在较低温度下的相反观察结果由甲酯部分解释。
Ignition delay time measurements of dimethyl carbonate (DMC)/n-heptane blends have been studied in a shock tube in the temperature range of 1100–1600K, at different equivalence ratios (0.5; 1.0; 2.0), pressures of 2.0 and 10.0 atm, and with mole fractions of DMC in the fuel blends varying from 0% to 100% (0%; 20%; 80%; 100%). A detailed model of DMC/n-heptane was constructed to simulate the ignition process of neat and blended fuels. The effect of equivalence ratio on the ignition delay time of fuel blends was found to be increasingly weak with an increase in DMC addition. Reaction path analysis was conducted to explain the equivalence ratio effect. The concentration of the radical pool increased during its buildup stage at higher temperatures as DMC addition increases, leading to an enhanced chemical reactivity in the reaction system. The opposite observation at lower temperatures was interpreted by the methyl ester moiety.