Multi-Dimensional Analysis of Turbulent Natural Gas Flames Using Detailed Chemical Kinetics

Abstract A numerical approach for predicting multi-dimensional reacting flows is presented. The various interacting processes which occur during combustion are considered: turbulent transport, chemical reaction, and radiative heat transfer. The formulation is based on time-averaged transport equations. Turbulent transport is modeled with the k-∊ turbulence model, chemical reactions are considered using the eddy dissipation concept (EDC), and radiative heat transfer is modeled with the discrete ordinates method. The EDC includes influences of both local turbulence and finite-rate chemical kinetics on the reaction rates, and is applicable to general, n-step, elementary reaction mechanisms. The model is applied to two swirling natural gas flames. Predictions are presented for several detailed and reduced reaction mechanisms including the 279-step GRI-Mech. Results indicate that the use of intermediate and detailed reaction mechanisms with the EDC significantly reduces uncertainty associated with simple one- ...

[1]  D. Spalding.  Mixing and chemical reaction in steady confined turbulent flames , 1971 .

[2]  A. D. Gosman,et al.  Two calculation procedures for steady, three-dimensional flows with recirculation , 1973 .

[3]  Jack B. Howard,et al.  Kinetics of carbon monoxide oxidation in postflame gases , 1973 .

[4]  D. K. Edwards,et al.  Molecular Gas Band Radiation , 1976 .

[5]  B. Hjertager,et al.  On mathematical modeling of turbulent combustion with special emphasis on soot formation and combustion , 1977 .

[6]  F. Williams,et al.  Turbulent Reacting Flows , 1981 .

[7]  W. Jones,et al.  Calculation methods for reacting turbulent flows: A review , 1982 .

[8]  N. Peters.  Laminar diffusion flamelet models in non-premixed turbulent combustion , 1984 .

[9]  W. Fiveland.  Discrete-Ordinates Solutions of the Radiative Transport Equation for Rectangular Enclosures , 1984 .

[10]  S. Pope.  PDF methods for turbulent reactive flows , 1985 .

[11]  G. Raithby,et al.  A multigrid method based on the additive correction strategy , 1986 .

[12]  Robert J. Kee,et al.  PSE: a Fortran program for modeling well-stirred reactors , 1986 .

[13]  David E. Keyes,et al.  Numerical Solution of Two-Dimensional Axisymmetric Laminar Diffusion Flames , 1986 .

[14]  Philip J. Smith,et al.  Modeling of swirl in turbulent flow systems , 1986 .

[15]  Andy D. Leonard,et al.  A simple chemical reaction in numerically simulated homogeneous turbulence , 1987 .

[16]  S. Majumdar.  Role of underrelaxation in momentum interpolation for calculation of flow with nonstaggered grids , 1988 .

[17]  R. Borghi,et al.  Turbulent reactive flows , 1989 .

[18]  B. Launder,et al.  The numerical computation of turbulent flows , 1990 .

[19]  R. J. Kee,et al.  Chemkin-II : A Fortran Chemical Kinetics Package for the Analysis of Gas Phase Chemical Kinetics , 1991 .

[20]  X. Bai,et al.  Calculation of turbulent combustion of propane in furnaces , 1993 .

[21]  Stephen B. Pope,et al.  PDF calculations of turbulent nonpremixed flames of using reduced chemical mechanisms , 1993 .

[22]  Pedro J. Coelho,et al.  Calculation of a Confined Axisymmetric Laminar Diffusion Flame Using a Local Grid Refinement Technique , 1993 .

[23]  On modeling of unsteady combustion utilizing continuum mechanical mixture theories and Large Eddy Simulations , 1995 .

[24]  S. Patankar.  Numerical Heat Transfer and Fluid Flow , 2018, Lecture Notes in Mechanical Engineering.