Detailed numerical simulations of primary atomization of airblasted liquid sheet

This paper investigates the primary atomization of airblasted liquid sheet using detailed numerical simulations. The under airblasting conditions involve complex mechanisms and a thorough understanding is necessary. A planar pre-filming airblast configuration have been chosen to study breakup sheet/film injected on solid flat plate. We investigated an operating point directly relevant for high altitude relight condition aircraft. has based experimental investigation Gepperth et al. [S. Gepperth, A. Müller, R. Koch, H.-J. Bauer, Ligament droplet characteristics in atomization, Proceedings ICLASS, 12th Triennial International Conference Liquid Atomization Spray Systems, September 2-6, Heidelberg, Germany, 2012] atomization. simulations performed in-house Navier–Stokes solver that uses consistent mass momentum flux computation technique. purpose this work provide comprehensive database analyses sheet. include studies effect velocity profile characteristics, occurrence secondary drop coalescence, extraction near-field characteristics. qualitative results from showed there are two major film — sheet/bag ligament breakup. diameter distributions computed was found be same order magnitude although under-predicting data. Based atomized data, both coalescence observed occur quantitative ligaments revealed lengths these as data while under-prediction observed. Finally, excellent agreement between Sauter Mean Diameter (SMD) droplets.