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Laminar flame characteristics and chemical kinetics of 2-methyltetrahydrofuran and the effect of blending with isooctane EI SCIE Scopus
期刊论文 | 2018 , 191 , 213-225 | COMBUSTION AND FLAME
WoS CC Cited Count: 1
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Abstract :

2-methyltetrahydrofuran (MTHF) has been considered as a potential biofuel candidate for the renewable feedstock and attractive properties. In this study, the spherically propagating flames of the MTHF/isooctane-air mixtures in different blending ratios were investigated at elevated temperatures and pressures over equivalence ratios of 0.8-1.5 in a constant volume chamber using high-speed photography technique. Laminar burning velocities were calculated through nonlinear method and correlated by mixing rules as a function of initial temperature, pressure, equivalence ratio, and blending ratio. To investigate the influence of the potential interaction between MTHF and isooctane, a detailed model was established by merging the models of the two fuels and validated against laminar burning velocity, ignition delay times and flame structure. The laminar flame velocities of MTHF were observed to increase with initial temperature while the flame velocities decrease with increase in pressure. Kinetic analysis indicates that the major consumption pathways for MTHF are through H abstraction reactions at 2 and 5 sites. The H abstraction reactions at methyl group are less competitive. Unsaturated hydrocarbons and aldehydes are produced in high concentration and are the main stable intermediates of MTHF combustion. The laminar burning velocity is sensitive to the reactions of small radicals and some intermediates such as propylene and ethylene. The laminar burning velocities of MTHF/isooctane blends increase with MTHF blending ratio. The influence of blending ratio on laminar burning velocity should attribute to the chemical factors, rather than thermal or diffusion factors. MTHF oxidation generates less proportion of propylene and higher fractions of H, OH than isooctane, reflecting positive chemical effects on laminar burning velocity as MTHF blended. According to the instability analysis, the Markstein length and critical radius shows similar flame instability among different blending ratios. (C) 2017 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Keyword :

Laminar burning velocity Flame instability Mixing rule 2-methyltetrahydrofuran Flame propagation Isooctane

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GB/T 7714 Wang, Xibin , Fan, Xiangshan , Yang, Kangkang et al. Laminar flame characteristics and chemical kinetics of 2-methyltetrahydrofuran and the effect of blending with isooctane [J]. | COMBUSTION AND FLAME , 2018 , 191 : 213-225 .
MLA Wang, Xibin et al. "Laminar flame characteristics and chemical kinetics of 2-methyltetrahydrofuran and the effect of blending with isooctane" . | COMBUSTION AND FLAME 191 (2018) : 213-225 .
APA Wang, Xibin , Fan, Xiangshan , Yang, Kangkang , Wang, Jingshan , Jiao, Ximing , Guo, Zhiyi . Laminar flame characteristics and chemical kinetics of 2-methyltetrahydrofuran and the effect of blending with isooctane . | COMBUSTION AND FLAME , 2018 , 191 , 213-225 .
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A novel carbonate as a diesel fuel additive EI SCIE Scopus
期刊论文 | 2017 , 35 (7) , 726-731 | PETROLEUM SCIENCE AND TECHNOLOGY | IF: 0.981
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Abstract :

A new oxygenate 2, 2(/)-diethoxyethyl carbonate was synthesized through transesterification using dimethyl carbonate and ethylene glycol monoethyl ether as raw materials and its chemical structure was identified through FT-IR, H-1 NMR, and GC-MS analyses. The oxygenate is miscible with individual hydrocarbons at normal temperature. When 2, 2(/)-diethoxyethyl carbonate is added to diesel fuel, kinematic viscosity decreases slightly, smoke point increases linearly, flash point and solidifying point decline remarkably even at low content level of 5%(v), whereas they do not decrease further with the increase in its content level. When a diesel engine was fueled with a diesel fuel containing 25%(v) of the oxygenate, the smoke emissions were reduced up to 83.3%, the energy consumption was decreased by up to 15.5%, whereas the power output dropped noticeably at high speed.

Keyword :

performance fuel property Clean diesel fuel additive 2,2 '-diethoxyethyl carbonate synthesis

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GB/T 7714 Guo, Hejun , Guo, Zhengxi , Liu, Shenghua . A novel carbonate as a diesel fuel additive [J]. | PETROLEUM SCIENCE AND TECHNOLOGY , 2017 , 35 (7) : 726-731 .
MLA Guo, Hejun et al. "A novel carbonate as a diesel fuel additive" . | PETROLEUM SCIENCE AND TECHNOLOGY 35 . 7 (2017) : 726-731 .
APA Guo, Hejun , Guo, Zhengxi , Liu, Shenghua . A novel carbonate as a diesel fuel additive . | PETROLEUM SCIENCE AND TECHNOLOGY , 2017 , 35 (7) , 726-731 .
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Research on ethylene glycol monomethyl ether palm oil monoester as a novel biofuel EI SCIE Scopus
期刊论文 | 2016 , 35 (1) , 241-249 | ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY | IF: 1.672
WoS CC Cited Count: 4
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Abstract :

In the article, a new biofuel named ethylene glycol monomethyl ether palm oil monoester (EGMMEPOM) is developed as a clean alternative fuel for diesel engine. It was synthesized through transesterification reaction with a refined palm oil and ethylene glycol monomethyl ether (EGMME) as reactants and potassium hydroxide (KOH) as catalyst under certain conditions. Its chemical structure was identified through Fourier transform-infrared (FT-IR) spectrum, H-1 nuclear magnetic resonance (H-1 NMR) spectroscopy, and gel permeation chromatography (GPC) analyses, and its main fuel properties were measured precisely. A two-cylinder diesel engine was utilized to investigate its combustion performances, fuel economy and emissions characteristics. When the engine was operated with the new biofuel at a high speed of 2000 r/min instead of diesel fuel, smoke emissions were decreased by 26.3% to 70.0% with carbon monoxide (CO) and hydrocarbon compounds (HC) emissions significantly reduced. Nitrogen oxides (NOx) emissions were decreased by 14.0% to 23.5%. The new palm oil monoester has a cetane number as high as 77.0 which leads to a shorter autoignition delay duration than diesel fuel and makes the curves of in-cylinder pressure increasing rate and heat release rate shift forward 2 to 3 degrees crank angle (degrees CA). Owing to more amount of oxygen existing in the new biofuel, both peak in-cylinder pressure increasing rate and peak heat releasing rate decreased. (c) 2015 American Institute of Chemical Engineers Environ Prog, 35: 241-249, 2016

Keyword :

biofuel combustion performances ethylene glycol monomethyl ether palm oil monoester fuel property emission characteristics chemical structure synthesis

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GB/T 7714 Guo, Hejun , Liu, Shenghua , Wang, Rudong et al. Research on ethylene glycol monomethyl ether palm oil monoester as a novel biofuel [J]. | ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY , 2016 , 35 (1) : 241-249 .
MLA Guo, Hejun et al. "Research on ethylene glycol monomethyl ether palm oil monoester as a novel biofuel" . | ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY 35 . 1 (2016) : 241-249 .
APA Guo, Hejun , Liu, Shenghua , Wang, Rudong , Su, Junzuo , Ma, Jing , Feng, Yang . Research on ethylene glycol monomethyl ether palm oil monoester as a novel biofuel . | ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY , 2016 , 35 (1) , 241-249 .
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Performances and Emissions of New Glycol Ether Blends in Diesel Fuel Used As Oxygenated Fuel for Diesel Engines EI SCIE Scopus
期刊论文 | 2016 , 142 (1) | JOURNAL OF ENERGY ENGINEERING | IF: 1.944
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Abstract :

In the paper, an investigation was conducted on the combustion performance and emission characteristics of a single cylinder diesel engine burning diesel fuel containing a new oxygenate blend of propylene glycol monomethyl ether (PGMME) and ethylene glycol dimethyl ether (EGDME) in a proportion of 1.6:1 by volume. When diesel fuel was added with 15-25% by volume of the oxygenate blend, the largest decrease in smoke opacity was observed to be as great as 90.3%, and the maximal reduction in carbon monoxide (CO) emissions amounted to 66.7%. Nitrogen oxide (NOx) emissions did not change noticeably. Hydrocarbon (HC) emissions increased more than double, but the level was still too low to take into consideration. The engine in-cylinder peak pressure and ignition delay did not alter. The in-cylinder peak pressure descended, and the peak heat release rate decreased in the premixing combustion, whereas it increased during diffusion combustion.

Keyword :

ethylene glycol dimethyl ether blend Emission characteristics Propylene glycol monomethyl ether Combustion performance Oxygenated fuel

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GB/T 7714 Guo, Hejun , Liu, Shenghua , He, Jianhong . Performances and Emissions of New Glycol Ether Blends in Diesel Fuel Used As Oxygenated Fuel for Diesel Engines [J]. | JOURNAL OF ENERGY ENGINEERING , 2016 , 142 (1) .
MLA Guo, Hejun et al. "Performances and Emissions of New Glycol Ether Blends in Diesel Fuel Used As Oxygenated Fuel for Diesel Engines" . | JOURNAL OF ENERGY ENGINEERING 142 . 1 (2016) .
APA Guo, Hejun , Liu, Shenghua , He, Jianhong . Performances and Emissions of New Glycol Ether Blends in Diesel Fuel Used As Oxygenated Fuel for Diesel Engines . | JOURNAL OF ENERGY ENGINEERING , 2016 , 142 (1) .
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Experiment on spray characteristics of alcohol and biodiesel blends EI Scopus CSCD PKU
期刊论文 | 2016 , 34 (3) , 260-267 | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)
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Abstract :

Macroscopic and microscopic spray characteristics of biodiesel, B 20 (80% biodiesel-20% n-butanol), P 20 (80% biodiesel-20% n-propanol), E 20 (80% biodiesel-20% ethanol), including the spray tip penetration, spray cone angle, Sauter mean diameter (SMD) and droplets size distribution, were experimentally investigated with high speed photography and particle/droplet image analysis (PDIA) methods. Experimental results show that spray tip penetration are in the order biodiesel>B 20>P 20>E 20, the spray cone angle are in the order biodiesel<B 20<P 20<E 20 under similar conditions. The influence of fuel becomes less significant under higher injection pressure and ambient pressure conditions. Increasing injection pressure leads to smaller SMD and larger fraction of droplets with small diameter. The SMD of alcohol-biodiesel blends is 1.6 μm (5.7%) smaller than that of biodiesel. SMDs of three alcohol-biodiesel blends decrease but their differences are small at axial distance of 50 mm, injection pressure of 80 MPa, ambient pressure of 1 MPa. The results shows that biodiesel blended with alcohols can promote the spray atomization. © 2016, Chinese Society for Internal Combustion Engines. All right reserved.

Keyword :

Ambient pressures Droplets sizes Injection pressures Macroscopic and microscopic Sauter mean diameter (SMD) Spray atomization Spray characteristics Spray tip penetration

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GB/T 7714 Yang, Kang-Kang , Li, Xin-Xin , Li, Jun-Ge et al. Experiment on spray characteristics of alcohol and biodiesel blends [J]. | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) , 2016 , 34 (3) : 260-267 .
MLA Yang, Kang-Kang et al. "Experiment on spray characteristics of alcohol and biodiesel blends" . | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) 34 . 3 (2016) : 260-267 .
APA Yang, Kang-Kang , Li, Xin-Xin , Li, Jun-Ge , Wang, Jing-Shan , Wang, Xi-Bin . Experiment on spray characteristics of alcohol and biodiesel blends . | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) , 2016 , 34 (3) , 260-267 .
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Investigation on auto-ignition characteristics of MTHF using a shock tube EI Scopus CSCD PKU
期刊论文 | 2016 , 34 (1) , 1-8 | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)
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Abstract :

Ignition delays of 2-methyltetrahydrofuran (MTHF), covering pressures from 0.12 to 1.00 MPa, temperatures from 1050 to 1800 K, equivalence ratios from 0.5 to 2.0, and fuel concentrations of 0.25%-1.00%, were measured behind reflected shock wave, and an Arrhenius correlation was obtained according to the experimental data. Results showed that ignition delays of MTHF decrease with the increase of temperature, pressure and fuel concentration, and increase with the increase of equivalence ratio. Two chemical kinetic models (Kai mech and Luc mech) were used to make the simulations. Comparison of the prediction of ignition delays with the two mechanisms showed that, Luc mech underpredicts the ignition delays markedly and Kai mech can well predict the ignition delays of MTHF at most conditions except it underpredict the rich mixtures at low temperatures around 1250 K. With the replacement of the base mechanism of Kai mech by NUI mechanism, a new mechanism was proposed and it can well predict the ignition delays of MTHF under all conditions both at high temperatures and low temperatures. Sensitivity analysis showed that the most important reaction determining the ignition delays of MTHF at high temperatures is H+O2=O+OH. As temperature is decreased, the influence of this reaction is decreased and the reactions involving fuel decomposition and H-abstraction play more important roles in the auto-ignition of MTHF. Pathway analysis showed that MTHF is mainly consumed through the decomposition at high temperatures. As temperature is decreased, the contribution of fuel decomposition reactions decreases and H-abstraction reactions become the main pathways to consume the MTHF. © 2016, Chinese Society for Internal Combustion Engines. All right reserved.

Keyword :

2-methyltetrahydrofuran Arrhenius correlation Chemical kinetic model Equivalence ratios Fuel concentration Fuel decomposition Ignition delays Reflected shock waves

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GB/T 7714 Wang, Jing-Shan , Fan, Xiang-Shan , Yang, Kang-Kang et al. Investigation on auto-ignition characteristics of MTHF using a shock tube [J]. | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) , 2016 , 34 (1) : 1-8 .
MLA Wang, Jing-Shan et al. "Investigation on auto-ignition characteristics of MTHF using a shock tube" . | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) 34 . 1 (2016) : 1-8 .
APA Wang, Jing-Shan , Fan, Xiang-Shan , Yang, Kang-Kang , Wang, Xi-Bin . Investigation on auto-ignition characteristics of MTHF using a shock tube . | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) , 2016 , 34 (1) , 1-8 .
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Effects of EGR on unregulated emission characteristics of DME engine EI Scopus CSCD PKU
期刊论文 | 2015 , 36 (3) , 33-37 | Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering
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A Model 2102QB diesel engine was retrofitted to run fueled with dimethyl ether (DME, CH3OCH3) in various EGR rates and to investigate EGR rate effect on unregulated emissions characteristics including CH3OCH3, formaldehyde (HCHO) and methyl formate (HCOOCH3) with gas chromatography. Experimental results show that unburnt CH3OCH3 emission is the largest in amount in the three pollutants, max. concentration reaches 0.75 g/(kW·h), and specific HCHO and HCOOCH3 emissions are one magnitude lower than that of CH3OCH3, max. concentration are of around 0.091 g/(kW·h) and 0.061 g/(kW·h) respectively. With engine speed increasing, CH3OCH3 emission decreases while HCHO exhibits increase-decrease variation trend; and with engine load increasing, CH3OCH3, HCHO & HCOOCH3 emissions are all decrease. After introducing EGR, CH3OCH3 emission increases and the increment decreases with engine load increasing; HCHO emission still exhibits increase-decrease variation trend and the variation is obvious while load lower than 40%. However, HCOOCH3 emission exhibits typical features of low temperature oxidation reaction products, i.e. exhibits increase-decrease variation trend with EGR rate increasing. ©, 2015, Chinese Society for Internal Combustion Engines. All right reserved.

Keyword :

Compression ignition engine DME IC engines Methyl formate Unregulated emissions

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GB/T 7714 Wang, Wen-Rui , Li, Dong-Hua , Zhang, Li-Qiang et al. Effects of EGR on unregulated emission characteristics of DME engine [J]. | Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering , 2015 , 36 (3) : 33-37 .
MLA Wang, Wen-Rui et al. "Effects of EGR on unregulated emission characteristics of DME engine" . | Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering 36 . 3 (2015) : 33-37 .
APA Wang, Wen-Rui , Li, Dong-Hua , Zhang, Li-Qiang , Wei, Yan-Ju , Liu, Sheng-Hua , Wu, Gang . Effects of EGR on unregulated emission characteristics of DME engine . | Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering , 2015 , 36 (3) , 33-37 .
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Comparative experiment on macroscopic and microscopic characteristics of fatty acid methyl ester and diesel sprays EI Scopus CSCD PKU
期刊论文 | 2015 , 33 (1) , 29-34 | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)
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Abstract :

Spray characteristics of fatty acid methyl ester (FAME)/diesel under common-rail injection condition were investigated, using the high speed photography and particle/droplet image analyses (PDIA), including penetration, spray angle and Sauter mean diameter (SMD). Experimental results show that both fuel sprays present the two-stage mode. The empirical correlation on injection pressure, ambient pressure and density was formulated for the spray tip penetration. Spray angle is increased with the increase of ambient pressure. FAME has slightly longer penetration and slightly smaller spray angle than those of diesel. SMD of diesel is smaller than that of FAME and the difference is less than 3,microns. It was observed that the spray characteristics of FAME and diesel are similar because of their similarity in fuel properties, thus little modification is needed for the engine fueled with FAME or FAME/diesel blends. ©, 2014, Chinese Society for Internal Combustion Engines. All right reserved.

Keyword :

Common rail injection Comparative experiments Diesel Empirical correlations Fatty acid methyl ester Macroscopic and microscopic Sauter mean diameter (SMD) Spray characteristics

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GB/T 7714 Li, Jun-Ge , Li, Xin-Xin , Wang, Xi-Bin . Comparative experiment on macroscopic and microscopic characteristics of fatty acid methyl ester and diesel sprays [J]. | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) , 2015 , 33 (1) : 29-34 .
MLA Li, Jun-Ge et al. "Comparative experiment on macroscopic and microscopic characteristics of fatty acid methyl ester and diesel sprays" . | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) 33 . 1 (2015) : 29-34 .
APA Li, Jun-Ge , Li, Xin-Xin , Wang, Xi-Bin . Comparative experiment on macroscopic and microscopic characteristics of fatty acid methyl ester and diesel sprays . | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) , 2015 , 33 (1) , 29-34 .
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Burning velovity and statistical flame front structure of yurbulent flames at high pressure up to 1.0 MPa
期刊论文 | 2015 , 68 , 196-204 | Experimental Thermal and Fluid Science | IF: 2.128
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GB/T 7714 Jinhua Wang , Senbin Yu , Meng Zhang et al. Burning velovity and statistical flame front structure of yurbulent flames at high pressure up to 1.0 MPa [J]. | Experimental Thermal and Fluid Science , 2015 , 68 : 196-204 .
MLA Jinhua Wang et al. "Burning velovity and statistical flame front structure of yurbulent flames at high pressure up to 1.0 MPa" . | Experimental Thermal and Fluid Science 68 (2015) : 196-204 .
APA Jinhua Wang , Senbin Yu , Meng Zhang , Wu Jin , Zuohua Huang , Shuang Chen et al. Burning velovity and statistical flame front structure of yurbulent flames at high pressure up to 1.0 MPa . | Experimental Thermal and Fluid Science , 2015 , 68 , 196-204 .
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Study on cycle-by-cycle variations of ionic current and pressure in engine EI Scopus CSCD PKU
期刊论文 | 2011 , 32 (12) , 2146-2150 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

The ionic current nearby the electrodes is detected by the spark plug. The cycle-by-cycle variations of the ionic current and of the pressure are researched. It shows that the cycle-by-cycle variations of the ionic current duration are basically the same as the pressure's variations, and they are small. The coefficient of the first peak and position are large. The coefficient of the second peak value and position, integral value and duration between two peaks are middle in the parameters. The coefficients of both ionic current and pressure increase with air-fuel ratio. The coefficient of the ionic current duration is decreasing when the sampling times increases, and it remains constant if the sampling times is larger than 60.

Keyword :

Air fuel ratios Cycle by cycle variation Integral values Ionic current Peak values Pressure increase Sampling time

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GB/T 7714 Wu, Xiao-Min , Li, Gen , Gao, Zhong-Quan et al. Study on cycle-by-cycle variations of ionic current and pressure in engine [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2011 , 32 (12) : 2146-2150 .
MLA Wu, Xiao-Min et al. "Study on cycle-by-cycle variations of ionic current and pressure in engine" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 32 . 12 (2011) : 2146-2150 .
APA Wu, Xiao-Min , Li, Gen , Gao, Zhong-Quan , Meng, Xiang-Wen , Wei, Ruo-Nan . Study on cycle-by-cycle variations of ionic current and pressure in engine . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2011 , 32 (12) , 2146-2150 .
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