Modeling of a dilute vaporizing multicomponent fuel spray

A simplified spray environment is used to represent the multicomponent nature of liquid fuels and to examine the sensitivity of their vaporization behavior to the various liquidand gas-phase models. Liquid-phase models are the diffusion limit, the infinite diffusion, and the vortex. Gas-phase models are the Ranz-Marshall correlation and the axisymmetric model. Three subsets of equations are solved by a hybrid Eulerian-Lagrangian, explicit-implicit scheme. Results demonstrate that the fuel vapor distributions are extremely sensitive to the models considered, that the internal circulation is less important for the multicomponent case as compared to the single component, that the multicomponent results are in complete contrast to those for the single component, and that an acceptable spray model should realistically consider the diffusive-convective processes inside and outside the droplet. For most spray situations, the diffusionlimit model is recommended.