On the basis of the theory of jet instability

the turbulent flow inside the nozzle was added into the primary breakup model in the form of weight coefficient.According to the value of deformation of the droplet

the TAB model and the KH-RT model were used to calculate the droplet breakup process by competition mechanism

and then the mathematical model of breakup. The accuracy of the model was verified by comparing the calculated results with the experimental data

TAB and KH-RT breakup model. The maximum relative errors of the Hybrid breakup model for the calculation of the radius and height after impingement were 8% and 6%

respectively

which were far less than the calculated values of the other two breakup models. The three breakup models were applied to the diesel engine

and the effects of these models on the fuel distribution were compared. The study found that the calculation result of the Hybrid breakup model was more accurate than the TAB and KH-RT model.