Optimisation method for automatic selection of rate constants of global reaction mechanisms

Zakharov, Aleksander D.; Fursenko, Roman; Minaev, Sergey

doi:10.1080/13647830.2022.2153743

Cited by 3 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, a description of the properties of the premixed, nonpremixed, and partially premixed combustion of hydrocarbon fuels could be successfully studied by using the values of the Arrhenius reaction kinetics parameters [43]. Various optimisation approaches aimed at finding the kinetic parameters are proposed in [44][45][46].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Activation Energy of Hydrogen–Methane Mixtures

Moroshkina,

Ponomareva,

Mislavskii

et al. 2024

Fire

View full text Add to dashboard Cite

In this work, the overall activation energy of the combustion of lean hydrogen–methane–air mixtures (equivalence ratio φ = 0.7−1.0 and hydrogen fraction in methane α=0, 2, 4) is experimentally determined using thin-filament pyrometry of flames stabilised on a flat porous burner under normal conditions (p=1 bar, T = 20 °C). The experimental data are compared with numerical calculations within the detailed reaction mechanism GRI3.0 and both approaches confirm the linear correlation between mass flow rate and inverse flame temperature predicted in the theory. An analysis of the numerical and experimental data shows that, in the limit of lean hydrogen–methane–air mixtures, the activation energy approaches a constant value, which is not sensitive to the addition of hydrogen to methane. The mass flow rate for a freely propagating flame and, thus, the laminar burning velocity, are measured for mixtures with different hydrogen contents. This mass flow rate, scaled over the characteristic temperature dependence of the laminar burning velocity for a one-step reaction mechanism, is found and it can also be used in order to estimate the parameters of the overall reaction mechanisms. Such reaction mechanisms will find implementation in the numerical simulation of practical combustion devices with complex flows and geometries.

show abstract

Section: Introductionmentioning

confidence: 99%

“…As is known [46], there is ambiguity in the choice of the correlation factor and activation energy if only the optimisation procedure is employed. This means that the choices of the parameters of the Arrhenius one-step reaction must guarantee suitability with the real characteristics of the combustion wave propagation.…”

Section: Introductionmentioning

confidence: 99%