Impact of exhaust gas recirculation on ignition delay times of gasoline fuel: An experimental and modeling study

2019 ◽  
Vol 37 (1) ◽  
pp. 639-647 ◽  
Author(s):  
Liming Cai ◽  
Ajoy Ramalingam ◽  
Heiko Minwegen ◽  
Karl Alexander Heufer ◽  
Heinz Pitsch
Keyword(s):  
Ignition Delay ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Gas Recirculation ◽  
Modeling Study

Homogeneous Ignition Delay, Flame Propagation Rate and End-Gas Autoignition Fraction Measurements of Natural Gas and Exhaust Gas Recirculation Blends in a Rapid Compression Machine

2020 ◽  
Author(s):  
Jeffrey Mohr ◽  
Bret Windom ◽  
Daniel B. Olsen ◽  
Anthony J. Marchese
Keyword(s):  
Natural Gas ◽  
Flame Propagation ◽  
Ignition Delay ◽  
Exhaust Gas Recirculation ◽  
Propagation Rate ◽  
Delay Period ◽  
Exhaust Gas ◽  
Rapid Compression Machine ◽  
Gas Recirculation ◽  
Ignition Delay Period

Abstract To evaluate the effect of exhaust gas recirculation (EGR) and variable fuel reactivity on knock and misfire in spark ignited national gas engines, experiments were conducted in a rapid compression machine to measure homogeneous ignition delay, flame propagation rate, and end-gas autoignition fraction for stoichiometric natural gas/oxidizer/EGR blends. Natural gas with a range of chemical reactivity was simulated using mixtures of CH4, C2H6, and C3H8. Reactive exhaust gas recirculation (R-EGR) gases were simulated with mixtures of Ar, CO2, CO, and NO and non-reactive exhaust gas recirculation gases (NR-EGR) were simulated with mixtures of AR and CO2. Homogeneous ignition delay period, flame propagation rate and end-gas autoignition fraction were measured at compressed pressures and temperatures of 30.2 to 34.0 bar and 667 to 980 K, respectively. Flame propagation rate decreased with both R-EGR and NR-EGR substitution. The substitution of R-EGR increased the end-gas autoignition fraction, whereas NR-EGR substitution decreased the end-gas autoignition fraction. The results indicate that the presence of the reactive species NO in the R-EGR has a strong impact on end-gas autoignition fraction. An 82-species reduced chemical kinetic mechanism was also developed that reproduces measured homogeneous ignition delay period with a total average relative error of 11.0%.

Experimental and Modeling Study on Ignition Delay Times of Dimethyl Ether/Propane/Oxygen/Argon Mixtures at 20 bar

2013 ◽  
Vol 27 (7) ◽  
pp. 4007-4013 ◽  
Author(s):  
Erjiang Hu ◽  
Zihang Zhang ◽  
Lun Pan ◽  
Jiaxiang Zhang ◽  
Zuohua Huang
Keyword(s):  
Dimethyl Ether ◽  
Ignition Delay ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Modeling Study

Shock Tube Measurements and Modeling Study on the Ignition Delay Times ofn-Butanol/Dimethyl Ether Mixtures

2014 ◽  
Vol 28 (6) ◽  
pp. 4206-4215 ◽  
Author(s):  
Zhuang Geng ◽  
Lili Xu ◽  
Hua Li ◽  
Jiaxing Wang ◽  
Zhen Huang ◽  
...  
Keyword(s):  
Shock Tube ◽  
Dimethyl Ether ◽  
Ignition Delay ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Modeling Study

Measurements of the High Temperature Ignition Delay Times and Kinetic Modeling Study on Oxidation of Nitromethane

2019 ◽  
Vol 192 (2) ◽  
pp. 313-334 ◽  
Author(s):  
Zhongquan Gao ◽  
Meng Yang ◽  
Chenglong Tang ◽  
Feiyu Yang ◽  
Ke Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Kinetic Modeling ◽  
Ignition Delay ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Modeling Study

Experimental and modeling study on ignition delay times of dimethoxy methane/ n -heptane blends

Fuel ◽  
2017 ◽  
Vol 189 ◽  
pp. 350-357 ◽  
Author(s):  
Erjiang Hu ◽  
Zhenhua Gao ◽  
Yang Liu ◽  
Geyuan Yin ◽  
Zuohua Huang
Keyword(s):  
Ignition Delay ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Modeling Study
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