Advanced spray evaporation model for turbine fuels

A droplet convective evaporation model, which includes effects of multicomponent turbine fuel, finite diffusivity, high pressure, real gas, critical evaporation, and secondary droplet breakup, has been further extended to predict the evaporation of whole spray, including change of airflow parameters with spray evaporation process, droplet to droplet interaction, and coupling between droplet breakup and interaction, both for monodisperse and polydisperse spray. The prediction with partial correction of droplet interaction effects for monodisperse spray is in good agreement with published experimental data. For monodisperse spray, if the downsbeam droplet is in line with the upstream one, the effect of droplet interaction is to reduce the evaporation rate by a factor of 0.55-0.75. The droplet evaporation history in a polydisperse spray (the Same diameter, Same environment) will change if it is in a spray of different %,No values. 20, No values will also affect the initial critical droplet diameter for breakup. Comparisons between the calculation results from different modeling (with or without droplet interaction, with or without droplet breakup) show significant difference. It is necessary to include the droplet breakup and partial correction on droplet interaction effect in the spray evaporation model. I-/