Simulation of single droplet evaporation characteristics for diesel fuel represented by six-component mixture

To make an accurate simulation of the complex components, a blend of six components (toluene, ndecane, n-dodecane, n-tetradecane, n-hexadecane and n-octodecane) was used as a representative for diesel. A multicomponent droplet vaporization model with thermal radiation absorption was built and validated to the experimental data. Calculations agree well with the experiments. Vaporization characteristics of diesel droplet evaporation are satisfactorily predicted by the six component blend. Compared with mono-component droplet (n-dodecane, nhexadecane), the evaporation rate of the six-component surrogate fuel becomes faster while the heating rate is slower in the initial evaporating period, but the droplet lifetime is longer and the droplet temperature is higher at the end. The surface mass fraction of each component changes quickly while that of the central one only changes a little in the later evaporation period.