1D/3D simulation procedure to investigate the potential of a lean burn hydrogen fuelled engine

Abstract In recent years hydrogen, especially the one generated by renewable energy, is gaining increasing attention as a clean fuel to support future mobility towards efficient and low emission solutions for propulsion systems. this scenario, present work deals with virtual conversion of single-cylinder Diesel engine, conceived marine applications, into hydrogen Spark Ignition (SI) unit. A simulation methodology adopted, combining 1D 3D Computational Fluid Dynamics (CFD) methods. First, experiments are realized on original engine mounted test bench, collecting main performance indicators emissions. complete model (GT-Power ™ ) developed validated against measurements. Then, cylinder (STAR-CD) set-up related combustion outcomes compared both experimental results, showing an overall good agreement. second stage, unit converted port-injected SI engine; re-arranged utilized reproduce pre-mixed combustions under ultra-lean air/fuel (A/F) mixtures. Also, partly modified coupled advanced sub-model integrated fast tabulated chemical kinetics predict knock. particular, evolution calibrated results CFD simulation. Finally, applied investigate advantages in terms efficiency, NO, unburned H 2 formation at medium/high loads.