Effects of ethane addition on diesel-methane dual-fuel combustion in a heavy-duty engine

The present study is a continuation of the previous work by Ahmad et al. (2020), in which ethane (C2H6) enriched diesel-methane (CH4) dual-fuel (DF) combustion was experimentally investigated single-cylinder heavy-duty engine. Here, experiments DF are carried out with new details together supporting zero-dimensional (0D) and one-dimensional (1D) chemical kinetics simulations. Three port-fuel injected (PFI) gaseous blends pure methane varying concentrations 0%, 10%, 20% used as main fuels. PFI blend provides 97% total-fuel energy (TFE), ignited small 3% (TFE based) pilot diesel. Experiments performed under lean condition (?gas = 0.52) for two engine speeds while keeping TFE other operating conditions constant. Calculated results from 0D 1D simulations relevant including theoretical mode analysis (?-curve) to deepen phenomenological understanding experimental results. reveal that adding into has minor effects on pilot-diesel ignition timing. However, addition greatly enhances ignitability after start combustion. Ethane yield higher thermal efficiency reduce duration compared methane. According analysis, tendency promote spontaneous autoignition may be one reasons improving overall performance. It observed produce lower unburned (UB-CH4) hydrocarbons (THC) accompanied nitrogen oxides (NOx) because efficiency. Furthermore, considerably helps cycle-to-cycle variations