HIGH FIDELITY SIMULATION ON THE BREAKUP AND DEFORMATION CHARACTERISTICS OF LIQUID JET IN CROSSFLOW WITH RECTANGULAR NOZZLES

High fidelity simulation was carried out by ANYS software to investigate the primary breakup characteristics of liquid jet in crossflow. The influence of nozzles shapes on the breakup features and deformation characteristics of liquid column was analyzed. Air velocity ranged from 40 m/s to 80 m/s and the shape of nozzles included circular, Rectangle-A, and Rectangle-B. The results indicated that, at the higher velocity of crossflow, the surface breakup of liquid column was mainly affected by the air velocity passing through the sides, rather the sharp corner of the rectangular nozzles. As compared with the circular nozzle, the boundary of breakup regime was expanded for Rectangle-A, while it was shrunk for Rectangle-B. In contrast to circular nozzles, the deflection of edges of liquid column was avoided for rectangular nozzles, thus preventing the shrinkage of liquid column during injection. The results of the analysis of the flow structures of crossflow showed that the air velocity in the flow direction of liquid column might be the reason for the difference of breakup regime of nozzles. In addition, the difference of windward trajectory between rectangular nozzles with the different widths was decreased as the air velocity increased.