A comparison between the performance of two extended mechanisms in predicting pollutants of a methane-air jet diffusion flame

Abstract

Paper presented at the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Turkey, 19-21 July, 2010.The present paper deals with the influence of the extended chemical kinetics mechanism on the accuracy of the thermo-chemical quantities in reacting flows. Two extended mechanisms, namely the GRI-Mech3 and the Konnov mechanisms are used to simulate Methan-Air opposed jet flow. Results show that GRI-Mech3 better predicts CO and H2 species than the Konnov mechanism. However, the Konnov mechanism is superior in predicting heavier hydrocarbons such as C,H, and CoH4. Results for pollutant species show that the Konnov mechanism predicts NO to a very good degree of accuracy. As to the computational economy, GRI-Mech3 stands higher than the Konnov mechanism, as it has less species and reactions.