Solutions for a turbulent jet diffusion flame of ethanol with NOx formation using a reduced kinetic mechanism obtained by applying ANNs

Fuel ◽  
2018 ◽  
Vol 231 ◽  
pp. 373-378 ◽  
Author(s):  
F.N. Pereira ◽  
A.L. De Bortoli
Keyword(s):  
Diffusion Flame ◽  
Kinetic Mechanism ◽  
Turbulent Jet ◽  
Nox Formation ◽  
Reduced Kinetic Mechanism

scholarly journals Evaluation of Emission Model for Diffusion Flame, Rich/Lean, and Premixed Lean Combustors

1993 ◽  
Author(s):  
N. K. Rizk ◽  
H. C. Mongia
Keyword(s):  
Diffusion Flame ◽  
Variable Structure ◽  
Kinetic Mechanism ◽  
Chemical Kinetic ◽  
Reaction Scheme ◽  
Emission Model ◽  
Nox Formation ◽  
Model Calculations ◽  
Lean Combustion ◽  
Wide Range

A recently developed emission model was used to predict the emission characteristics of a gas turbine combustor. The model involves a multiple-step reaction scheme that addresses the breakup of the fuel into an intermediate hydrocarbon compound of variable structure. The reaction rate expressions developed in the present approach simulated the results obtained using a detailed chemical kinetic mechanism over a wide range of operation that is typically encountered in a conventional diffusion flame combustor, as well as low NOx rich/quench/lean, and premixed/prevaporized lean combustion concepts. The modeling of the combustor involves dividing the combustor into a number of reactors representing various combustion and near wall regions of the combustor. The calculations showed that the fuel reaction could proceed at a completely different rate depending on the conditions prevailing in each region of the combustor. The model results also indicated that at idle power mode the initial rate of NOx formation was high. However, due to the subsequent admission of air, no further addition to the NOx concentration was predicted at downstream locations. At high power levels, the fuel rich region near the combustor dome inhibits the formation of NOx. The admission of air in this case brings the fuel/air mixture close to the stoichiometric value causing a significant amount of NOx to form. The model calculations agreed quite well with the measured data of the combustor.

scholarly journals A REDUCED KINETIC MECHANISM FOR PROPANE FLAMES

2012 ◽  
Vol 11 (1-2) ◽  
pp. 37
Author(s):  
G. S. L. Andreis ◽  
R. S. Gomes ◽  
A. L. De Bortoli
Keyword(s):  
Finite Difference ◽  
Finite Difference Method ◽  
Diffusion Flame ◽  
Difference Method ◽  
Kinetic Mechanism ◽  
Governing Equations ◽  
Propane Combustion ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Reduced Kinetic Mechanism

Propane is one of the simplest hydrocarbons that can be a representative of higher hydrocarbons used in many applications. Therefore, this work develops a ten-step reduced kinetic mechanism among 14 reactive species for the propane combustion. The model is based on the solution of the flamelet equations. The equations are discretized using the second-order space finite difference method, using LES (Large-Eddy Simulation). Obtained results compare favorably with data in the literature for a propane jet diffusion flame. The main advantage of this strategy is the decrease of the work needed to solve the system of governing equations.

A Reduced Kinetic Mechanism for the Combustion ofn-Butanol

2018 ◽  
Vol 32 (1) ◽  
pp. 867-874 ◽  
Author(s):  
Mario Díaz-González ◽  
Cesar Treviño ◽  
Juan C. Prince
Keyword(s):  
Kinetic Mechanism ◽  
Reduced Kinetic Mechanism

Reduced kinetic mechanism for combustion of synthesis gas at elevated temperatures and pressures

2012 ◽  
Vol 48 (5) ◽  
pp. 590-601 ◽  
Author(s):  
T. A. Bol’shova ◽  
A. G. Shmakov ◽  
S. A. Yakimov ◽  
D. A. Knyaz’kov ◽  
O. P. Korobeinichev
Keyword(s):  
Synthesis Gas ◽  
Elevated Temperatures ◽  
Kinetic Mechanism ◽  
Reduced Kinetic Mechanism

Three-Dimensional Flamelet Simulation of Polycyclic Aromatic Hydrocarbons Formation in DI-Diesel Engines

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Beijing Zhong ◽  
Shuai Dang ◽  
Jun Xi
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Numerical Simulations ◽  
Aromatic Hydrocarbons ◽  
Direct Injection ◽  
Combustion Process ◽  
Three Dimensional ◽  
Kinetic Mechanism ◽  
Flamelet Model ◽  
Polycyclic Aromatic ◽  
Reduced Kinetic Mechanism

In this study, numerical simulations for an n-heptane fueled Chaochai 6102bzl direct injection diesel engine are performed in order to predict the chemical details of the combustion process and resulting polycyclic aromatic hydrocarbons (such as benzene, naphthalene, phenanthrene and pyrene) formation. The diesel geometry and reduced kinetic mechanism of n-heptane oxidation, which includes only 86 reactions and 57 species, have been developed and incorporated into the computational fluid dynamics code, FLUENT. The diesel unsteady laminar flamelet model, turbulence model and spray model have been employed in the numerical simulations. The numerical simulation results showed that the polycyclic aromatic hydrocarbons were firstly increased with the increase of diesel crank angel and then decreased, which was mostly located at the bottom of diesel combustion chamber wall.

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