International Scientific Journal


The characteristics of partially-premixed flames is investigated by simulating a series of triple flames with different variations of chemical equivalent ratio. A 2-D reaction-diffusion manifold chemistry tabulation method is employed in the simulation and the results are compared with the CH4-air 19-step chemical reaction mechanism. The performance of these two mechanisms is then assessed by using direct numerical simulations coupled with GRI3.0 detailed mechanism. It is shown that both 2-D reaction-diffusion manifold table and 19-step simplified mechanism can describe the temperature and main products accurately, however, for some minor intermediary products, predictions from 2-D reaction-diffusion manifold table is observed to be better than 19-step simplified mechanism. Com-pared with the 19-step mechanism, 2-D reaction-diffusion manifold table only needs to solve only the transport equations for CO2 and N2 species, which greatly simplifies the solution process of chemical reaction and provides a reliable solution for the numerical simulation of turbulence with higher accuracy. This work indicates that as a relatively advanced kinetic simplified method, the reaction-diffusion manifold tabulation method can reduce the computational cost and at the same time retain the accuracy effectively.
PAPER REVISED: 2020-06-17
PAPER ACCEPTED: 2020-06-19
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THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 4, PAGES [2653 - 2664]
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© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence