Fragmentation Atomization Mechanisms in Subsonic Cross-Flow

Abstract

An accurate numerical simulation of fuel atomization is realized in preparation for the study of kerosene propellant fragmentation atomization and development process under subsonic conditions in the presence of a transverse air stream. Under 11 subsonic uniform incoming air mainstream velocity conditions, a kerosene transverse jet with an average flux-to-momentum ratio q=7.9-46 and an average gas Weber number (Weg) ranging from 5.6 to 120 is selected to enter the air mainstream. The transverse jet under the action of the kerosene fuel under subsonic conditions is analyzed by using the Volume of Fluid Method (VFM) method the Adaptive Mesh Using the Volume of Fluid Method (VFM) and Adaptive Mesh Refinement (AMR) methods, the primary atomization phenomenon under the transverse jet is investigated, and the accuracy of the numerical simulation method is verified by comparing it with the experimental results of the previous researchers. The results show that the kerosene fuel under the action of gas film will change the time and way of droplet breakup. This process will have the participation of Rayleigh-Taylor instability and Kelvin-Helmholtz instability, and the atomization process is negatively correlated with the mean gas Weber number and positively correlated with and has a large influence on the mean flux-to-momentum ratio q.