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Figure 1. 

Ammonia/oxygen premixed system (Equivalence ratio = 1.0, N is blue, H is white, O is red).

Figure 2. 

Evolution of main reactants at different equivalent ratios.

Figure 3. 

Temporal evolution of main radicals and products at different equivalence ratios.

Figure 4. 

Variation curves of NH₃ and O₂ with time at different temperatures.

Figure 5. 

Variation curves of radicals and formation products with time at different temperatures.

Figure 6. 

Reaction path of ammonia combustion.

Figure 7. 

Comparison of predictive capabilities of different mechanism. (The lines represent predictions seven comparative models, while the symbols correspond to experimentally measured data reported in Lhuillier et al.^[10], Takizawa et al.^[8], Mei et al.^[9], Shrestha et al.^[13], and Chen et al.^[25]).

Figure 8. 

Comparative verification of laminar burning velocity. (The line is the prediction result of this model and the other seven models, and the points are experimental data, from Hayakawa et al.^[11], Chen et al.^[12], Shrestha et al.^[13], Kanshina et al.^[14], Liang et al.^[15], Zhou et al.^[17], Kohansal et al.^[18], and Li et al.^[58]).

Figure 9. 

Comparative verification of ignition delay time. (The lines represent predictions from the present model and the other seven models, while the symbols correspond to experimentally measured data reported in Shu et al.^[22] and Chen et al.^[25]).

Figure 10. 

Species concentration profiles comparison between present model (solid lines), seven reference models (dashed lines), and experimental measurements (symbols) from Dagaut et al.^[27] and Osipova et al.^[29].

Figure 11. 

The main reaction path of the ammonia combustion process.

Figure 12. 

Sensitivity analysis of laminar burning velocity, ignition delay time, and species.