Comparison of different chemical kinetic mechanisms of methane combustion in an internal combustion engine configuration

Ennetta, Ridha; Mohamed, Hamdi; Saïd, Rachid

doi:10.2298/tsci0801043e

Cited by 15 publications

(5 citation statements)

References 8 publications

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“…The decomposition reaction of CO 2 and four oxidation reactions occur in the gas phase involving CH 4 , the volatile substance of coal, CO, and hydrogen. Here we use the reduced reaction mechanism for the simulation of methane-air combustion, which can adequately predict temperature and main species profiles [13]. On the surface of the coal particle, three oxidation reactions occur with the participation of oxygen, CO 2 , and water vapor, resulting in the formation of CO.…”

Section: Statement Of the Problemmentioning

confidence: 99%

Effect of coal dust on the air-methane mixture combustion in the Swiss-roll burner

Minkov

Moiseeva

2019

Therm sci

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The 2-D numerical model has been developed to simulate the combustion of lean coal-methane-air mixture in "Swiss-roll" burner and investigate the effect of coal particles content and mixture feed rate on the stable burner operation. Five homogeneous and three heterogeneous chemical reactions are considered. The Eulerian model for gas phase and the discrete particle model (Lagrangian) for particle phase taking into account the radiation are used in this study. Simulations are performed for the two turns "Swiss roll" burner with heat insulated outer wall, channel width of 6 mm and inner wall thickness of 2 mm. It is shown that the presence of coal particles in a lean methane-air mixture expands the range of stable operation of the "Swiss-roll" burner. It is found that an increase in the content of coal particles reduces the combustion time of the particles by increasing the combustion temperature, changes the shape of the reaction zone, and shifts it to the burner inlet.

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Section: Statement Of the Problemmentioning

confidence: 99%

Effect of coal dust on the air-methane mixture combustion in the Swiss-roll burner

Minkov

Moiseeva

2019

Therm sci

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“…Similarly, the low pressure indicates the in-complete combustion which means that net heat of reaction released is low [1]. The cylinder pressure is studied by a number of researchers [31][32][33][34][35] and obtained the pressure profiles as shown in Figure 3. For example, Ridha et al [31] in the study of three chemical kinetic mechanisms of methane combustion obtained the similar pressure profiles under stoichiometric conditions.…”

Section: The In-cylinder Pressure and Temperaturementioning

confidence: 99%

“…The cylinder pressure is studied by a number of researchers [31][32][33][34][35] and obtained the pressure profiles as shown in Figure 3. For example, Ridha et al [31] in the study of three chemical kinetic mechanisms of methane combustion obtained the similar pressure profiles under stoichiometric conditions. Li Cao et al [30] simulated the engine flow using the turbulence model and correlated the engine pressure variation with the heat released during the engine cycle.…”

Section: The In-cylinder Pressure and Temperaturementioning

confidence: 99%

Detailed Kinetic Mechanism of CNG Combustion in an IC Engine

Mansha

Hassan²,

Saleemi³

et al. 2011

ACES

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In this study, the four kinetic reaction mechanisms were developed to simulate the formation of pollutant species in CNG fired IC engine. The reactions were generated using EXGAS and coupled with Leed's NOx reactions to develop four kinetic mechanisms. These reaction mechanisms described the combustion of natural gas at low (below 800 K) to high (above 1000 K) temperature in combustion chamber. The simulation studies predicted that the maximum cylinder pressure was achieved up to 18.0 atm & 40.0 atm under fuel leaner conditions (φ ≈ 0.6) and fuel rich conditions (φ = 1.13 to 1.3) respectively. The simulation based data was compared with the experimental data (when engine was operated at 3000 rpm, φ = 1.0, P inlet = 0.67 atm). For fuel rich conditions, high concentrations of CO were observed while NO x levels were lowered while the fuel leaner mixture produced the lower CO emissions and moderate levels of NO x emissions. The NO x and CO profiles depicted that Mechanism-I, Mechanism-II and Mechanism III seemed to be inappropriate for predicting the emissions in due to CNG combustion IC engine. The molded data for Mechanism-IV exhibited closer agreement with experimental measurements. The rate of production analysis identified the important reactions in each mechanism which were contributing in the formation of emission concentrations of pollutant species. Although each proposed mechanism illustrated some discrepancies among the profiles, Mechanism-IV (consisting of 208 reactions and 78 species) showed good agreement with experimental data for pressure, temperature and pollutant species profiles.

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“…Reduced chemical kinetic mechanisms, which can represent important aspects of the behavior of these detailed mechanisms using few enough scalars that they can be implemented into CFD simulations, offer large potential improvement in the modeling of practical combustion devices . The feasibility of these mechanisms in the simulation of internal combustion engines (ICE) was demonstrated in a previous study …”

Section: Theoretical Basismentioning

confidence: 99%

“…In the present study, the four-step reaction mechanism of Jones and Lindstedt was chosen thanks to its good results in 1D propagating flame , and in ICE simulations: CH 4 + / 2 1 O 2 → CO + 2H 2 CH 4 + H 2 O → CO + 3H 2 H 2 + / 2 1 O 2 ↔ H 2 O CO + H 2 O ↔ CO 2 + H 2 …”

Section: Theoretical Basismentioning

confidence: 99%

Study of Methane Propagating Flame Characteristics Using PDF−Monte Carlo Model and Reduced Chemical Kinetic Scheme

2009

Self Cite

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The main purpose of this work is to simulate turbulent premixed and expanding flame in an adiabatic combustion chamber without taking into account flame-walls interactions. The turbulence is supposed to be isotropic and homogeneous with no decay or decreasing, but spatially correlated. The chemistry is represented by a four-step scheme of methane-air combustion. A one-dimensional simulation is considered because of the spherically symmetric of the problem. Ignition occurs in the middle of the domain thanks to an energy source such a spark. The simulation, based on Monte Carlo scalar probability density functions (PDF) transport method, is used under different equivalence ratios (ER) and different turbulence intensities (u′). We have placed our emphasis on some flame characteristics such as the flame mean radius, the turbulent flame radius, the flame propagation velocity, and the flame brush thickness. The results of our simulations, carried out in similar conditions to some available experiments, are in good agreements. Indeed, we notice that the flame radius is enhanced by ER at constant u′, and by u′ at constant ER. The flame brush thickness shows a quick growth at the first stage and a moderate growth in the intermediate regime, but a bending effect is observed in the final stage of the so-called "fully developed flame".

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Comparison of different chemical kinetic mechanisms of methane combustion in an internal combustion engine configuration

Cited by 15 publications

References 8 publications

Effect of coal dust on the air-methane mixture combustion in the Swiss-roll burner

Effect of coal dust on the air-methane mixture combustion in the Swiss-roll burner

Detailed Kinetic Mechanism of CNG Combustion in an IC Engine

Study of Methane Propagating Flame Characteristics Using PDF−Monte Carlo Model and Reduced Chemical Kinetic Scheme

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