Development of a skeletal mechanism for tri-component diesel surrogate fuel: N-hexadecane/iso-cetane/1-methylnaphthalene
Development of a skeletal mechanism for tri-component diesel surrogate fuel: N-hexadecane/iso-cetane/1-methylnaphthalene
复制标题
开发三组分柴油替代燃料的骨架机制：正十六烷/异十六烷/1-甲基萘
DOI：
10.1016/j.fuel.2019.116217
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发表时间：
2020-01-01
期刊：
影响因子：
7.4
通讯作者：
Wang, Peng
中科院分区：
文献类型：
--
作者：
Bai, Yuanqi;Wang, Ying;Wang, Peng
提出了正十六烷、异十六烷和1-甲基萘组成的三组分骨架机理。选择这些替代组分是因为它们不仅能准确地反映实际柴油的物理和化学性质，而且能反映柴油机的燃烧和排放特性。此外，代用燃料的碳数与真实的柴油的碳数更为接近，正十六烷和异十六烷是十六烷值评定的重要参考化合物。基于解耦方法建立了该柴油替代燃料的骨架反应机理模型，包括：H-2/CO/C-1详细反应机理，C-2-C-3简化反应机理，正十六烷、异十六烷和1-甲基萘的子反应机理，共234个反应，83个物种。在此之后，骨架机制进行了广泛的验证，对各种基本的燃烧实验，为每个纯组分及其混合物。此外，还利用真实的柴油在基本燃烧器和均质压燃（HCCI）发动机上的实验结果对骨架机理进行了验证。结果表明，计算结果与HCCI发动机着火延迟时间、主要组分浓度、层流火焰速度和缸内压力等实验数据吻合较好。总体而言，所开发的紧凑骨架机构适用于柴油机及其各部件的燃烧模拟。
A tri-component skeletal mechanism consisting of n-hexadecane, iso-cetane and 1-methylnaphthalene was developed. These surrogate components were selected because they can accurately reflect not only the physical and chemical properties of practical diesel fuel but also the combustion and emission characteristics of diesel engines. In addition, the carbon number of fuel surrogate is much closer to that of the real diesel fuel, what's more, n-hexadecane and iso-cetane are important reference compounds for the cetane number (CN) rating. A skeletal mechanism for this tri-component diesel surrogate fuel was formulated based on decoupling methodology, which contained: a detailed H-2/CO/C-1 mechanism, a reduced mechanism of C-2-C-3, and the sub-mechanisms of n-hexadecane, iso-cetane and 1-methylnaphthalene, including 234 reactions and 83 species. After that, the skeletal mechanism was widely verified against various fundamental combustion experiments for each pure component and their mixtures. Furthermore, the experimental results of real diesel fuel in both fundamental burners and homogeneous charge compression ignition (HCCI) engine were also used to validate the skeletal mechanism. Results showed that the calculated results agreed well with the experimental data including ignition delay times (IDTs), primary species concentrations, laminar flame speed and in-cylinder pressure of HCCI engine. Overall, the developed compact skeletal mechanism is suitable for the combustion simulation of diesel and each component.