Construction of reduced mechanism and prediction of the RON of toluene primary reference fuel/ethanol/diisobutylene

Zhu, Ziji; Zheng, Zhimin; Kong, Jing

doi:10.1016/j.renene.2021.03.079

Cited by 8 publications

(4 citation statements)

References 38 publications

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“…Finally, after the reaction of HCO + OH = CO + H 2 O is completed, a large amount of CO is generated, thereby releasing heat. 37 …”

Section: Resultsmentioning

confidence: 99%

“…After the reaction CH 2 O + OH = HCO + H 2 O, CH 2 O is oxidized by OH radicals to generate HCO radicals. Finally, after the reaction of HCO + OH = CO + H 2 O is completed, a large amount of CO is generated, thereby releasing heat …”

Section: Resultsmentioning

confidence: 99%

“…Finally, after the reaction of HCO + OH = CO + H 2 O is completed, a large amount of CO is generated, thereby releasing heat. 37 To determine the knock mechanism, the combustion at the monitoring points was analyzed from the point of chemical kinetics. Figure 4 shows the distribution field diagram of the temperature field, where HCO radicals and OH radicals are at 731−734 °CA.…”

Section: Determination Of the Time And Location Of Knockmentioning

confidence: 99%

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Research on the Effect of Water Injection Pressure on Knocking Combustion of a Direct Injection Gasoline Engine

Dai

Zheng

2022

ACS Omega

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In this study, the research method of numerical simulation is used to explore the inhibition of different water injection pressures on knock combustion of turbocharged direct injection gasoline (GDI) engines by coupling computational fluid dynamics with a chemical-kinetics model. First, the ignition advance angle and compression ratio are increased to induce the GDI engine to knock, and then the influence of the water injection pressure on the in-cylinder, evaporation of water, and the knock of the gasoline engine are analyzed. The simulation results show that, compared with no water injection, the direct injection of water in the cylinder can significantly reduce the knock intensity. When the water injection pressure is greater than 40 bar, the knock intensity is less than 2 and the knocking is completely suppressed. In this work, the effects of different water injection pressures on knocking are explored by analyzing the effects of water injection pressure on water atomization, in-cylinder combustion, and the knocking mechanism. On the one hand, the evaporation rate of water increases with increasing water injection pressure and the quality of the liquid film generally improves. On the other hand, direct water injection can significantly reduce the distribution of CH 2 O in the end mixture, thereby reducing the generation of H 2 O 2 and further suppressing the spontaneous combustion of the end mixture. At the moment of knock, when the water injection pressure is greater than 40 bar, the detonation mechanism of the no. 7 monitoring point does not produce a sudden change in HCO radicals. The water spray can effectively reduce the NO x emission, and the NO x emission under the water spray pressure of 120 bar is the lowest. However, after spraying water, it will increase CO emissions.

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“…Finally, after the reaction of HCO + OH = CO + H 2 O is completed, a large amount of CO is generated, thereby releasing heat. 37 …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Determination Of the Time And Location Of Knockmentioning

confidence: 99%

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Research on the Effect of Water Injection Pressure on Knocking Combustion of a Direct Injection Gasoline Engine

Dai

Zheng

2022

ACS Omega

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“…Many alternative fuels with different physical and chemical properties have been considered. These alternatives include toluene blended fuel (TRF) composed of isooctane, n-heptane, and toluene [ 10 , 11 , 12 ], four-component fuel alternatives [ 13 , 14 , 15 ], and alcohol-containing alternatives [ 16 , 17 ], which have been verified in extensive experiments and model studies. Recently, naphthenic hydrocarbons have begun to be emphasized.…”

Section: Introductionmentioning

confidence: 99%

Construction of a Chemical Kinetic Model of Five-Component Gasoline Surrogates under Lean Conditions

Yang

Zheng

2022

Molecules

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The requirements for improving the efficiency of internal combustion engines and reducing emissions have promoted the development of new combustion technologies under extreme operating conditions (e.g., lean combustion), and the ignition and combustion characteristics of fuels are increasingly becoming important. A chemical kinetic reduced mechanism consisting of 115 species and 414 elementary reactions is developed for the prediction of ignition and combustion behaviors of gasoline surrogate fuels composed of five components, namely, isooctane, n-heptane, toluene, diisobutylene, and cyclohexane (CHX). The CHX sub-mechanism is obtained by simplifying the JetSurF2.0 mechanism using direct relationship graph error propagating, rate of production analysis, and temperature sensitivity analysis and CHX is mainly consumed through ring-opening reactions, continuous dehydrogenation, and oxygenation reactions. In addition, kinetic parameter corrections were made for key reactions R14 and R391 based on the accuracy of the ignition delay time and laminar flame velocity predictions. Under a wide range of conditions, the mechanism’s ignition delay time, laminar flame speed, and the experimental and calculated results of multi-component gasoline surrogate fuel and real gasoline are compared. The proposed mechanism can accurately reproduce the combustion and oxidation of each component of the gasoline-surrogate fuel mixture and real gasoline.

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Effects of different additives on physicochemical properties of gasoline and vehicle performance

Zhang

Zhao³

et al. 2023

Fuel Processing Technology

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Construction of reduced mechanism and prediction of the RON of toluene primary reference fuel/ethanol/diisobutylene

Cited by 8 publications

References 38 publications

Research on the Effect of Water Injection Pressure on Knocking Combustion of a Direct Injection Gasoline Engine

Research on the Effect of Water Injection Pressure on Knocking Combustion of a Direct Injection Gasoline Engine

Construction of a Chemical Kinetic Model of Five-Component Gasoline Surrogates under Lean Conditions

Effects of different additives on physicochemical properties of gasoline and vehicle performance

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