Effects of Different Methanol/Diesel Ratios on Engine Performance under Plateau Environment

This study investigates a diesel engine fueled with methanol/diesel blends to examine the effects of varying methanol ratios on combustion and emission characteristics. A three-dimensional computational fluid dynamics (CFD) model of the combustion chamber is developed using CONVERGE 3.0, coupled with a chemical kinetic mechanism generated via the CHEMKIN program, comprising 182 reactions and 52 species. The results indicate that compared to the original engine, methanol/diesel blends reduce peak in-cylinder pressure, maximum temperature, and emissions of NOx, NO, and soot. At a methanol blending ratio of 30%, NOx, NO, and soot emissions are reduced by 41.12%, 66.96%, and 26.54%, respectively.