Use of a convenient thermodynamic model to study the effects of operating parameters on nitrogen oxides emissions for a liquefied methane fueled spark-ignition engine
Use of a convenient thermodynamic model to study the effects of operating parameters on nitrogen oxides emissions for a liquefied methane fueled spark-ignition engine
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使用方便的热力学模型研究操作参数对液化甲烷燃料火花点火发动机氮氧化物排放的影响
DOI：
10.1016/j.fuel.2019.116001
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发表时间：
2019-12
期刊：
影响因子：
7.4
通讯作者：
Yanshan Yin
中科院分区：
文献类型：
--
作者：
Yongxiang Zhang;Jianqin Fu;Jun Shu;Mingke Xie;Jingping Liu;Yanshan Yin
摘要随着排放法规的日益严格，对内燃机的排放要求越来越高，尤其是氮氧化物（NOx）的排放量。采用一个方便的热力学模型研究了液化甲烷燃料火花点火发动机的运行参数对NOx排放的影响。通过实验数据验证了GRI-MECH 3.0机理的正确性，并利用缸内压力和放热率对热力学模型进行了标定。利用经过验证的具有详细燃烧化学机理的模型进行了数值研究。结果表明，当量比和发动机负荷对NOx排放的影响最大，其次是进气温度，最后是发动机转速和进气压力对NOx排放的影响最小。进气温度、发动机转速和进气压力对超稀混合气（φ = 0.5和0.6）NOx排放的影响有限。然而，在化学计量条件下，与相应操作条件的贫燃料相比，NOx排放出现减少。此外，NOx排放中90%以上为NO污染物，其中85%来自热机制，12%来自N2 O中间机制。更重要的是，与多组分天然气相比，液化甲烷在NOx排放方面具有优势。为后续的三维CFD模拟工作提供了研究方向，并为满足液化甲烷发动机排放法规的技术路线选择提供了理论依据。
Abstract With the increasingly restrictive emission regulations, the emission requirements for internal combustion (IC) engines become more stringent, especially the amount of nitrogen oxides (NOx) emissions. In this investigation, a convenient thermodynamic model was employed to study the effects of operating parameters on NOx emissions for a liquefied methane fueled spark-ignition engine. The selected GRI-MECH 3.0 mechanism was verified by the experimental data and the thermodynamic model was calibrated by the in-cylinder pressure and heat release rate (HRR). The validated model with detailed combustion chemistry mechanism was utilized to perform the numerical investigation. The results showed that equivalence ratio and engine load have the greatest impact on NOx emissions, followed by the intake gas temperature, and finally the engine speed and intake gas pressure have the least impact on NOx emissions. The intake gas temperature, engine speed and intake gas pressure have a limited influence on NOx emissions in ultra-lean mixtures (φ = 0.5 and 0.6). However, under stoichiometric conditions, a reduction appears in NOx emissions compared to the lean fuels of corresponding operating conditions. In addition, >90% NOx emissions are NO pollutants, with an occupation of 85% from thermal mechanism and a proportion of 12% from N2O-intermediate mechanism. More importantly, liquefied methane shows an advantage in terms of NOx emissions compared to multi-component natural gas. All these have provided research direction for the following 3-D CFD simulation work, and offered theoretical basis for selecting technology route to meet emission regulations of liquefied methane engine (LME).
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影响因子：
9
作者：
Feng Zhou;Jianqin Fu;Wenhui Ke;Jing-ping Liu;Zhipeng Yuan;B. Luo
通讯作者：
Feng Zhou;Jianqin Fu;Wenhui Ke;Jing-ping Liu;Zhipeng Yuan;B. Luo
影响因子：
10.4
作者：
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通讯作者：
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影响因子：
4.4
作者：
Burke, Ultan;Somers, Kieran P.;Curran, Henry J.
通讯作者：
Curran, Henry J.
影响因子：
7.4
作者：
H. E. Merhubi;A. Kéromnès;G. Catalano;B. Lefort;L. L. Moyne-L.
通讯作者：
H. E. Merhubi;A. Kéromnès;G. Catalano;B. Lefort;L. L. Moyne-L.
DOI：
10.1115/1.3124665
发表时间：
2010-02-01
影响因子：
1.5
作者：
Bourque, Gilles;Healy, Darren;Petersen, Eric
通讯作者：
Petersen, Eric