摘要：A numerical model of multiphase flow was developed to investigate the heat and mass transfer mechanisms in refueling process. The two-dimensional model takes into account the effects of surface tension, gravity, and viscosity. The heat and mass exchange process of free surface was defined to study isooctane liquid evaporation in refueling process. The reliability of the model was verified by the theoretical solution of the Stephan problem. The evolution of the flow field, temperature field, pressure field, concentration field, and evaporation rate was discussed in detail. It shows that there is a strong turbulence and gas entrainment phenomenon. The volume-averaged temperature of the fuel tank is lower than the ambient temperature, and the maximum difference is about 4°C resulting from evaporation; the curve of evaporation rate versus time is very similar to that of the volume-averaged pressure versus time. Besides, the change in evaporation rate is negligible after 1.75 s.
关键词：Gasoline evaporation; numerical simulation; refueling process; temperature distribution; concentration distribution
