In order to investigate the effect of the choice of chemical reaction model on the simulation of methane combustion,and to promote the efficient use of natural gas energy,FLUENT software was used to numerically simulate the combustion condition of methane in a burner.The effects of five chemical reaction models on the characteristics of methane combustion such as efficiency,flame profile,combustion residual temperature and NO emissions were analyzed.The results showed that the Composition PDF Transport model and the Eddy Dissipation Concept model were more advantageous than other chemical reaction models in methane combustion simulation.The combustion efficiency and residual combustion temperature of methane reached a high level,among which the inter-component reaction was more adequate in the Component PDF transport model,and the gas outlet residual temperature reached 681.972 K.The peak flame temperature in the combustion domain showed a positive correlation with NO emission.The peak flame temperature of the combustion reaction under the Eddy Dissipation model was the highest (2280 K),but it also produced the most harmful NO gas,while the combustion residual temperature under this reaction was lower.The turbulent kinetic energy also showed a positive correlation with the combustion temperature,and the magnitude of turbulent kinetic energy in the combustion domain affected the methane combustion effect to a certain extent.
维普
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