Kinetic modeling study of hydrogen addition effects on ignition characteristics of dimethyl ether at engine-relevant conditions
Kinetic modeling study of hydrogen addition effects on ignition characteristics of dimethyl ether at engine-relevant conditions
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发动机相关条件下加氢对二甲醚点火特性影响的动力学模型研究
DOI：
10.1016/j.ijhydene.2015.02.080
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发表时间：
2015-04
影响因子：
7.2
通讯作者：
Zuohua Huang
中科院分区：
文献类型：
--
作者：
Erjiang Hu;Xin Meng;Zihang Zhang;Zuohua Huang
通过 CHEMKIN 软件包与化学动力学模型相结合，研究了在发动机相关条件下氢气对二甲醚 (DME) 与空气的点火特性的影响。首先，使用四个最近开发的 DME 模型来验证以前文献中测量的点火延迟时间。验证结果表明NUIG Mech_56.54与文献数据吻合较好，因此选择NUIG Mech_56.54对DME/H2混合物在低温下的着火行为进行如下模拟和化学动力学分析。随后，利用NUIG Mech_56.54对不同氢气混合比例（0、50%、80%、90%、95%、98%和100%）下DME/H2/空气的自燃进行了模拟。研究发现，在发动机相关条件下，氢气延迟了二甲醚的点火正时，并且这种影响随着氢气混合比的增加而呈非线性。通过自由基摩尔分数分析对抑制和非线性效应进行化学解释。最后，进行了反应途径和敏感性分析，以进一步了解 DME/H2 混合物在发动机相关条件下的点火化学反应。
The effects of hydrogen on ignition characteristics of dimethyl ether (DME) with air under engine-relevant conditions were studied by CHEMKIN package coupled with chemical kinetic models. Firstly, four recently developed DME models were used to validate the measured ignition delay times from previous literature. The validation results showed that NUIG Mech_56.54 agrees the literature data best and thus was chosen to conduct the following simulations and chemical kinetic analysis of ignition behaviors of DME/H2mixture at low temperature. Subsequently, simulations of auto-ignition of DME/H2/air using NUIG Mech_56.54 were made under various hydrogen blending ratios (0, 50%, 80%, 90%, 95%, 98% and 100%). It was found that hydrogen retarded the ignition timing of DME at engine-relevant conditions and this effect was non-linear with the increase of hydrogen blending ratio. The inhibition and non-linear effect was chemically interpreted by radical mole fraction analysis. Finally, reaction pathway and sensitivity analysis were made to gain further insight on ignition chemistries of DME/H2blends under engine-relevant conditions.
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影响因子：
7.2
作者：
T. Shudo;Hiroyuki Yamada
通讯作者：
T. Shudo;Hiroyuki Yamada
影响因子：
4.4
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
2.9
作者：
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通讯作者：
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影响因子：
6.4
作者：
Ziliang Zhu;Lin Dechao;Jiazeng Liu;Yuhao Wei;S-H Liu
通讯作者：
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