Theoretical breakup model in the planar liquid sheets exposed to high-speed gas and droplet size prediction

摘要

Highlights?A two-staged breakup model is proposed in planar sheets by co-flowing high-speed gas.?Combination of linear stability method with the full-wave integral method in calculation of droplet SMD.?Explicit expression for droplet SMD agrees well with previous experimental data.?Gas compressibility and viscosity hardly affect the theoretical prediction of SMD for this breakup model.AbstractThis paper makes an effort to describe the atomization in the air-blast breaking liquid sheet, with an emphasis on the establishment of the theoretical model capable of quantitatively predicting the performance of the atomizer. The phenomenological two-staged breakup model for a cylindrical jet exposed to the high-speed gas has been extended to the planar sheet, combined with a classical linear stability analysis whether gas compressibility and viscosity are included.