Impact of Spray Droplet Distribution on the Performances of a Kerosene Lean/Premixed Injector

摘要: Large-Eddy Simulation (LES) of a novel lean-premixed (LP) injection system for aeronautical burners is performed at elevated pressure / temperature operating conditions. This LP injector was designed to operate high-pressure and high-temperature it experimentally investigated DLR Cologne CORIA laboratory in Rouen. At Cologne, the purpose measure droplets sizes velocities thanks Phase Doppler Anemometry (PDA) technique. CORIA, combustion under realistic conditions on HERON test rig with advanced combined optical diagnostics, such as OH Kerosene Planar Laser-Induced Fluorescence (PLIF). It observed that flame topology strongly depends pressure. configuration therefore an interesting validation database LES. In this injector, liquid kerosene injected far upstream order provide gaseous fuel distribution homogeneous possible. LES, full geometry taken into account. One reference point 8.33bar 669.3K simulated. A Lagrangian point-particle approach chosen spray modeling prescribed Rosin-Rammler diameter injection. The two-phase model relies tabulated chemistry approach. flame/turbulence interactions are included via presumed-PDF closure (PCM-FPI model). impact characteristics analyzed through dedicated parametric study. Four sets parameters each different Sauter Mean Diameter used describe droplet size distribution. An analysis characteristic evaporation time its influence has been carried out. Numerical results then compared experimental data bring detailed insights topology. study shows quality atomization influences inside chamber.