Numerical investigation of droplet evaporation in high-pressure dual-fuel conditions using a tabulated real-fluid model

The substitution of diesel by cleaner renewable fuels such as short-chain alcohols in dual-fuel internal combustion engines is considered an attractive solution to reduce the pollutant emissions from engines. In this context, two-phase flow models for multi-component mixtures considering real-fluid thermodynamics are required further understanding evaporation and mixing processes transcritical conditions. present study proposes efficient model (RFM) based on a two-phase, fully compressible four-equation under mechanical thermal equilibrium assumptions with diffused interface closed thermodynamic tabulation approach. Compared previous research limited binary tabulation, proposed pre-tabulation approach can handle ternary using table that has been coupled CONVERGE CFD solver. newly developed RFM applied investigate n-dodecane droplet mixed ambient (methanol nitrogen) relevant configuration compared pure nitrogen ambient. four equation tabulated Cubic Plus Association (CPA) Peng–Robinson (PR) equations state single component ambient, respectively. Numerical predictions show lifetime decreases monotonically increasing methanol concentration performed analysis demonstrates follows different path function concentration. mechanisms contributing behavior varying conditions discussed.