Mathematical modeling of MILD combustion of pulverized coal

Schaffel, N.; Mancini, Marco; ̧k, A. Szle; Weber, Roman

doi:10.1016/j.combustflame.2009.04.008

Cited by 133 publications

(125 citation statements)

References 28 publications

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“…Christo and Dally [6] tested several models for MILD combustion and found that the eddy dissipation concept (EDC) model with a detailed kinetic scheme is the best. Recently, HiTAC has been also simulated for coal [7,8]. Mardani and Tabejamaat [9] studied the effect of hydrogen on hydrogen methane turbulent non-premixed flame under MILD combustion regime by using CFD.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Entropy Generation in the Flameless Oxidation Using Large Eddy Simulation Model and OpenFOAM Software

Mousavi¹

2014

Int. J. Thermo

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This paper employs large eddy simulation (LES) to investigate non-premixed flameless oxidation occurring in the IFRF furnace with varying fuel-injection angle. In order to model radiation and combustion using OpenFOAM software, finite volume discrete ordinate model and partially stirred reactor are applied whereas the detailed mechanism GRI-2.11 is undertaken represent chemistry reactions. The obtained results are compared with the experimental measurements of Mancini's et al. After ensuring the accuracy of the LES method, the combustion characteristics are examined when using different fuel injection angles into the combustion chamber. The results explain using fuel injection with an angle into the combustion chamber, the net rate of reaction and entropy generation increases.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Entropy Generation in the Flameless Oxidation Using Large Eddy Simulation Model and OpenFOAM Software

Mousavi¹

2014

Int. J. Thermo

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“…The CPD model requires five input parameters, which can be determined from the C NMR spectroscopy, which is a very complex procedure. Schaffel et al [9] utilized the IFRF experimental data in order to characterize both devolatilization and charcombustion processes, and thus determine the five parameters of the CPD model. Since this procedure are expensive and time consuming, in this work has been used the Genetti correlations [16], which correspond to a series of non-linear correlations able to estimate the five parameters.…”

Section: Matematical Modelmentioning

confidence: 99%

“…At the University of Stuttgart have been obtained experimental and numerical results by carrying out measurements and simulations in pilot furnace [7][8]. Schaffel et al [9] performed numerical simulations of pulverized coal combustion in pre-heated air condition in a pilot IFRF furnace. Despite they did not use advanced turbulencechemistry interaction models, their findings, are in agreement with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of MILD (moderate or intense low-oxygen dilution) combustion of coal in a furnace with different coal gun positions

Perrone¹,

Amelio²

2016

IJHT

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The aim of this study is to analyze the temperature field, the specie concentrations of MILD coal combustion in a pilot furnace through the CFD. The attention is focused especially on the effect of the position of coal guns and their distance from the central air jet, in order to investigate both temperature and specie concentration distributions. The authors have performed several simulations in three dimensional steady-state condition of a quarter of the IFRF furnace using a high bituminous A coal. The Eddy Dissipation Model has been used to describe and model the interaction between turbulence and chemistry, while the P1 model has been used for the radiation. In order to describe the solid phase and the combustion process, the Lagrangian description has been used and sub-models have been implemented for devolatilization and char burnout. In particular has been used the Chemical Percolation Model (CPD) for the devolatilization and the intrinsic model for the oxidation of char. The turbulence phenomenon has been modeled resorting to the standard k-ε model, considering the standard wall functions for the wall treatment. The results show that the mild condition is obtained for all three configurations. When the distance between the coal guns and the center air jet are furthest, the oxygen concentration is lowest, consequently the combustion takes place in a fuel-rich zone. This condition can influence the NOx emissions.

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“…Several models adopted Lagrangian approach in treating the particle phase when modelling pulverized coal combustion [10][11][12]. Concerning the biomass combustion, the Lagrangian approach was used by Fletcher [13] to simulate the flow and reactions inside an entrained biomass gasifier and the numerical results showed the capability of the Lagrangian model to optimise the design of such gasifiers.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the heterogeneous combustion processes of solid fuels

Alganash

Paul

Watson

2015

Fuel

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Mathematical modeling of MILD combustion of pulverized coal

Cited by 133 publications

References 28 publications

Numerical Study of Entropy Generation in the Flameless Oxidation Using Large Eddy Simulation Model and OpenFOAM Software

Numerical Study of Entropy Generation in the Flameless Oxidation Using Large Eddy Simulation Model and OpenFOAM Software

Numerical simulation of MILD (moderate or intense low-oxygen dilution) combustion of coal in a furnace with different coal gun positions

Numerical investigation of the heterogeneous combustion processes of solid fuels

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