Kinetic Models of Methane-Hydrogen Mixture Combustion: Brief Review and Validation
A. S. Semenikhin, С. С. Матвеев, I. V. Chechet, С. Г. Матвеев, D. V. Idrisov, N. I. Gurakov, D. V. Radin, S. S. Novichkova, N. I. Fokin, N. O. Simin, А. А. Ивановский, D. S. Tarasov
Abstract
Abstract A brief review is presented of kinetic models of combustion of hydrogen and methane-hydrogen mixtures. For numerical simulation of nitrogen oxide concentrations during combustion of methane-hydrogen in combustion chambers, nine kinetic models were studied (three Konnov-2019 models with 51, 74, and 128 components two Stagni models with 55 and 59 components; CRECK-2020; Wang-2018; NUIGMech1.0; and GRI 3.0), and predictions by these models were verified against the experimental data from the world leading laboratories. The models were verified against the ignition delay time, normal flame propagation speed, and distribution of NO concentration above the burner. The verification has revealed that the Konnov-2019 (128 components), Konnov-2019 (74 components), and NUIGMech1.0 models require proper selection of the solver parameters or preliminary reduction. The GRI 3.0 model considerably underestimates the high-temperature ignition time in the range of 1100–1450 K. The reduced Konnov-2019 model (51 components) accurately predicts the flame propagation speed; however, it cannot predict NO concentrations for rich air-fuel mixtures. The CRECK 2020 (CH4) model underestimates NO concentrations for stoichiometric mixtures. The predictions by the Stagni models underestimate NO concentrations and feature a considerable deviation from the normal flame propagation speed for mixtures with a high hydrogen content (50%). The Wang-2018 model agrees well with the experimental data on the normal flame propagation speed. This model yields the best predictions of NO concentrations and is most suitable for numerical simulation of designed combustion chambers.