Fig. 8: Numerical setups and validation of the numerical models and chemical kinetic mechanisms.
From: Ammonia marine engine design for enhanced efficiency and reduced greenhouse gas emissions
a Details of the computational domain and mesh near the TDC, b–e Comparison of apparent heat release rate and in-cylinder pressure of the base engine between the experiments and simulations using the ammonia/n-heptane chemical kinetic mechanisms listed in Table 2 under ammonia energetic ratio of 40%, 60%, 80%, and 90%, f Comparison of unburned NH3, g Comparison of NOx, h Comparison of N2O, i Comparison of GHG (i.e., 298 × N2O + CO2) emissions of the base engine between the experiments and simulations using the ammonia/n-heptane chemical kinetic mechanisms listed in Table 2. (75% engine load, 1000 rpm, 120 MPa diesel injection pressure, and 318 K intake temperature). Source data are provided as a Source Data file.
