Effect of ambient pressure on spray jet flame behavior is studied. Three-dimensional large-eddy simulation (LES) is applied to spray jet flames at ambient pressures of 0.1, 0.5 and 1.0 MPa. Jet-A is used as liquid fuel, and the evaporating droplets' motions are tracked by a Lagrangian method. As turbulent combustion model, a flamelet/progress-variable approach which considers 274 chemical species and 1537 elementary reactions is used. The results show that as the ambient pressure increases, increase in gas temperature and evaporation of droplets become remarkable in the upstream region.

No abstract