The effects of different intake charge diluents on the combustion and emission characteristics of a spark ignition natural gas engine
The effects of different intake charge diluents on the combustion and emission characteristics of a spark ignition natural gas engine
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不同进气稀释剂对火花点火式天然气发动机燃烧和排放特性的影响
DOI：
10.1016/j.applthermaleng.2015.06.072
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发表时间：
2015-10
影响因子：
6.4
通讯作者：
Zhen Huang
中科院分区：
文献类型：
--
作者：
Zhuoyao He;Qijian Jing;Lei Zhu;Wugao Zhang;Zhen Huang
废气再循环（EGR）是控制内燃机NOx排放最常用的方法。EGR的主要成分是CO2和N2，它们通过热效应、稀释效应和化学效应对发动机燃烧和污染物生成产生不同的影响。在一台四缸电控增压火花点火天然气发动机上，研究了CO2和N2对发动机燃烧和排放的不同影响，并与Ar气进行了对比分析。结果表明，无论稀释剂类型如何，随着进气稀释程度的增加，缸内压力峰值和放热率均沿着降低。对于每种稀释气体，随着稀释比的增加，NOx排放降低，而HC排放增加。而CO排放量则呈现先降低后升高的趋势。结果还表明，通过进气稀释可以在牺牲少量HC排放的情况下同时降低NOx和CO排放。三种稀释剂的效果不同。在三种稀释剂中，CO2对降低NOx和CO排放的效果最好，其次是N2。CO2和N2稀释均降低了热效率，而Ar稀释提高了热效率，并且当NOx排放量降低到相同水平时，Ar稀释的热效率最高，CO排放量最低。
Exhaust gas recirculation (EGR) is the most common method to control NOxemission of internal combustion engine. The major components of EGR are CO2and N2, which have different influences on engine combustion and pollutants formation through thermal, dilution and chemical effects. The main objective of this work is to investigate the different influences of CO2and N2on engine combustion and emission on a four-cylinder, turbo charged, spark ignition natural gas engine with electronically control unit, simultaneously to separate the thermal effect with the comparison with Ar. It was found that the peak in-cylinder pressure and heat release rate both decreased along with the increase of intake dilution extent regardless of the diluent's type. For each diluent gas, NOxemission decreases while HC emission increases with the increased dilution ratio. However, CO emission firstly decreased and then increased. Results also revealed that NOxand CO emission could be simultaneously reduced by intake charge dilution at a little sacrifice of HC emission. The effects of three diluents are different compared with each other. Among these three diluents, it can be found that CO2is the most effective on reducing NOxand CO emission followed by N2. However, both CO2and N2dilution deteriorates the thermal efficiency while Ar dilution improved it. Besides, when NOxemission was reduced to the same level, the thermal efficiency is the highest and CO emission is the lowest for Ar dilution.
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影响因子：
7.2
作者：
V. Subramanian;J. Mallikarjuna;A. Ramesh
通讯作者：
V. Subramanian;J. Mallikarjuna;A. Ramesh
DOI：
10.1016/j.trd.2011.04.003
发表时间：
2011-08
影响因子：
7.6
作者：
Arvind Thiruvengadam;D. Carder;M. Krishnamurthy;A. Oshinuga;M. Gautam
通讯作者：
Arvind Thiruvengadam;D. Carder;M. Krishnamurthy;A. Oshinuga;M. Gautam
DOI：
10.1201/b17027-6
发表时间：
1995-10
期刊：
Aerothermodynamics and Jet Propulsion
影响因子：
--
作者：
S. Turns
通讯作者：
S. Turns
影响因子：
10.4
作者：
H. Moneib;M. Abdelaal;M. Selim;Osama A. Abdallah
通讯作者：
H. Moneib;M. Abdelaal;M. Selim;Osama A. Abdallah
DOI：
10.1016/b978-0-08-022106-9.50005-x
发表时间：
1979
期刊：
--
影响因子：
--
作者：
D. Spalding
通讯作者：
D. Spalding