A numerical simulation of the influence of different hydrogen fractions, excess air ratios and EGR mass fractions in a spark-ignition engine was conducted. Good agreement between the calculated and measured in-cylinder pressure traces as well as pollutant formation trends was obtained. The simulation results show that NO concentration has an exponential relationship with temperature and increases sharply as hydrogen is added. EGR introduction strongly influences the gas temperature and NO concentration in the cylinder. The difference in temperature will lead to even greater difference in NO concentration. Thus, EGR can effectively decrease NO concentration. NO concentration reaches its peak value at the excess air ratio of 1.1 regardless of EGR mass fraction. The study shows that natural gas-hydrogen blend combined with EGR can realize a stable combustion and low NO emission in a spark-ignition engine.
. Simulation of combustion in spark-ignition engine fuelled with natural gas-hydrogen blends combined with EGR[J]. Frontiers of Energy and Power Engineering in China, 0, (): 204-211.
Jie WANG, Zuohua HUANG, Bing LIU, Xibin WANG. Simulation of combustion in spark-ignition engine fuelled with natural gas-hydrogen blends combined with EGR. Front Energ Power Eng Chin, 0, (): 204-211.
Huang Zuohua, Wang Jinhua, Huang Yinyu. Research summary of hydrogen utilization on internal combustion engine. China Science and Technology Thesis Online , 2006-08-10, http://www.paper.edu.cn (in Chinese)
2
Karim G A, Wierzba I, Al-Alousi Y. Methane-hydrogen mixtures as fuels. International Journal of Hydrogen Energy , 1996, 21(7): 625-631 doi: 10.1016/0360-3199(95)00134-4
3
Bauer C G, Forest T W. Effect of hydrogen addition on performance of methane fueled vehicles, Part I: Effect on S.I. engine performance. International Journal of Hydrogen Energy , 2001, 26(1): 55-70 doi: 10.1016/S0360-3199(00)00067-7
4
Shodo T, Shimamura K, Nakajima Y. Combustion and emissions in a methane stratified charge engine with hydrogen pre-mixing. JSAE Review , 2000, 21(1): 3-7 doi: 10.1016/S0389-4304(99)00061-2
5
Sierens R, Rosseel E. Variable composition hydrogen/natural gas mixtures for increased engine efficiency and decreased emissions. Transactions of the ASME, Journal of Engineering for Gas Turbines and Power , 2000, 122(1): 135-140 doi: 10.1115/1.483191
6
Abd-Alla G H. Using exhaust gas recirculation in internal combustion engines: A Review. Energy Convers Manage , 2002, 43(8): 1027-1042 doi: 10.1016/S0196-8904(01)00091-7
7
Tao Wenquan. Numerical Heat Transfer. Xi’an: Xi’an Jiaotong University Press, 2001, 432-478
8
Tao Daxue, Kong Qiyi, Li Zhiming, . Grid generation of engine 3D simulation based on CFD. Tractor and Farm Transporter , 2008, 35(4): 85-87
Xia Xinglan, Li Detao, Dong Gang, . Progress and trends in research on mathematical models for combustion in internal combustion engines. Journal of Jiangsu University of Science and Technology , 1997, 18(3): 14-21 (in Chinese)
11
Shi Chuntao, Qin De, Tang Qi, . Developments in combustion modeling in ICE. Transactions of the Chinese Society for Agricultural Machinery , 2007, 38(4): 181-185 .
12
Jiang Deming, Chen Changyou, Yang Jialin, . Advanced Internal Combustion Engines Fundamentals. Xi’an: Xi’an Jiaotong University Press. 2006, 103-107
Li Zhiqiang, Wei Fei, Zhou Lixing. Progress in numerical simulation of turbulent reacting rate of NO Formation in Turbulent Combustion. Journal of Combustion Science and Technology , 2004, 10(5): 273-774 (in Chinese)
15
Akansu S O, Dulger A, Kahraman N, . Internal combustion engines fueled by natural gas-hydrogen mixtures. International Journal of Hydrogen Energy . 2004, 29(14): 1527-1539 doi: 10.1016/j.ijhydene.2004.01.018
16
Heywood J B. Internal Combustion Engine Fundamentals. New York: McGraw-Hill, 1998
17
Liu Bing, Huang Zuohua, Zeng Ke, . Experimental study on emissions of a spark-ignition engine fueled with natural gas-hydrogen blends. Energy and Fuels , 2008, 22(1): 273-277 doi: 10.1021/ef700485k
