| Numerical simulations considering phenomenological models of mass burning and heat release rate, heat transfer, mechanical friction and pumping losses were used to predict the performance of a spark-ignition (SI) engine using gaseous fuels. The model focuses on the two-zone model, namely the burned zone and unburned zone. The fuels considered in the simulations were methane and methane/hydrogen mixtures. The percentage of hydrogen in the methane/hydrogen mixtures was varied from 0 to 20 percent. The performance of the SI engine was predicted for a wide range of engine operating parameters including compression ratio, engine speed, fuel composition, equivalence ratio, ignition timing, and duration of combustion. The results of the simulations include indicated and brake powers, thermal efficiencies, and specific fuel consumption, and residual gas fraction. The results of the simulations were compared with the experimental results from the literature to verify the simulations. Good agreements were obtained. |
