Numerical investigations of low load diesel-methane dual fuel combustion at early diesel injection timings

The present work focuses on the development and validation of a CFD simulation setup diesel-methane dual fuel combustion in single-cylinder research engine (SCRE). validated is used to provide insight about at low-load operation. computational campaign consisted evaluating three different diesel injection timings 310, 320, 330 CAD methane percent energy substitution (PES) 80%, 5.1 bar gross IMEP, 500 pressure, 1.5 manifold air pressure where 360 corresponds firing top dead center. ability capture combustion, performance, emissions trends accurately demonstrated by good agreement with experimental data. further utilized insights into nature particularly, effect autoignition. Analysis results showed that onset both low-temperature heat release high-temperature n-dodecane (the chemical surrogate for diesel) delayed presence system. For early dual-fuel low-load, initial arises from burning followed combustion. Most piston compression ring crevices, areas near liner, remained unreacted after done. amount performance was also explored.