Numerical study of heat release rate markers in laminar premixed Ammonia-methane-air flames

Numerical Study on Heat Release Rate Markers with Nonunity Exponents for Ammonia–Methane Premixed Flames

“…To assess the effectiveness of individual marker species, several criteria were used in this study. Δ x p / w HRR and Δ w i / w HRR are standard metrics for quantifying the reconstruction performance of HRRMs and have been widely used in the literature . As shown in Figure , only the distribution of CH 2 O and HRR was selected when the mixing ratio is 0.5 and the equivalence ratio is 1.…”

“…Based on previous studies in the literature, 40 considered in the literature. 22 The marking methods and reconstruction effectiveness of both marker pairs are described below.…”

“…Δx p /w HRR and Δw i /w HRR are standard metrics for quantifying the reconstruction performance of HRRMs and have been widely used in the literature. 22 As shown in Figure 5, only the distribution of CH 2 O and HRR was selected when the mixing ratio is 0.5 and the equivalence ratio is 1. Both the species and HRR were normalized, and they tended to increase to the maximum and then decrease.…”

“…For example, Mulla et al 21 Despite the extensive research activities listed above, it is still worthy to find better combinations of measurable quantities for estimating instantaneous heat release profiles in premixed flames. Previous studies demonstrated that both the blending ratio 22 and equivalence ratio 23 have significant effects on the combustion characteristics of premixed ammonia−methane flames. A systematic analysis has been carried out so that all possible conditions can be tested.…”

“…A systematic analysis has been carried out so that all possible conditions can be tested. Furthermore, an index was introduced as an additional parameter to improve the accuracy of the correlation by Chi et al 24 Generally, the concentrations of HCO and OH, [HCO] 22 conducted a study where they simulated one-dimensional ammonia−methane-air flames in order to investigate the HRR markers for such flames. They proposed that [OH][CH 2 O] can be used for a wide range of conditions with a qualitative analysis.…”