Abstract
Two chemical kinetic mechanisms of methane combustion were tested and compared using a piloted axisymmetric turbulent non-premixed flame: 1-step and 4-step mechanism, to predict the temperature and species distributions. The numerical results are presented and compared with the experimental data. A 4-step methane mechanism was successfully implanted into CFD solver Fluent. The numerical solution is in very good agreement with previous numeral of 4-step mechanism and the experimental data. DOI: http://dx.doi.org/10.5755/j01.mech.19.6.6000
Highlights
Combustion is a complex phenomenon that is controlled by many physical processes including thermodynamics, buoyancy, chemical kinetics, radiation, mass and heat transfers and fluid mechanics
In the present work the applicability of two different kinetic mechanisms: global mechanism of Westbrook and Dryer ‘WD’ and reduced mechanism of Jones and Lindstedt, ‘JL’ on the predictions on a piloted nonpremixed turbulent flame to account for an accurate prediction of the flow and temperature field of a jet flame was investigated
The precompiled mechanism was linked to the solver by the means of User Defined Function (UDF)
Summary
Combustion is a complex phenomenon that is controlled by many physical processes including thermodynamics, buoyancy, chemical kinetics, radiation, mass and heat transfers and fluid mechanics. This makes conducting experiments for multi-species reacting flames extremely challenging and financially expensive. Detailed computational results can help us better predict the chemical structure of flames and understand flame stabilization processes These capabilities make Computational Fluid Dynamics (CFD) an excellent tool to complement experimental methods for understanding combustion and help in designing and choosing better fuel composition according to the specific needs of a burner. For skeletal mechanisms: Kazakov and Frenklach [15], Yungster and Rabinowitz [16], Petersen and Hanson [17], Hyer et al [18] and Li and Williams [19]
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