Two new 14-step and 16-step reduced mechanisms for methane-air combustion were systematically developed by assuming the quasisteady state for 26–28 species in the starting mechanism. A series of comparison between the reduced mechanisms and the starting mechanism was carried out with the emphasis on their capabilities in predicting formation and ignition delay. The two reduced mechanisms successfully capture the complex behaviors of formation, which depends on the characteristic mixing time, pressure, and the contamination of hydrocarbon in air. The flame structure and formation in diffusion flame were well predicted by the 16-step mechanism, while the 14-step showed less satisfactory performance on predicting prompt NO formation. The 16-step mechanism was shown accurate in predicting ignition delay over a wide range of equivalence ratio, temperature and pressure. The necessity of including and in the reduced mechanisms was discussed.
Reduced Mechanisms for Prediction of Formation and Ignition Delay in Methane-Air Combustion
Contributed by the Combustion and Fuels Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received by the C&E Division, October 2000; final revision received by the ASME Headquarters December 2000. Editor: H. D. Nelson.
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Homma, R., and Chen, J. (December 1, 2000). "Reduced Mechanisms for Prediction of Formation and Ignition Delay in Methane-Air Combustion ." ASME. J. Eng. Gas Turbines Power. April 2001; 123(2): 303–307. https://doi.org/10.1115/1.1360687
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