An Experimental and Numerical Study of Diesel Injection Spray Phenomena 2001-24-0010
An experimental and numerical study has been conducted investigating Diesel spray injection phenomena. Digital images of the liquid spray were made in a steady-state pressure chamber at a constant operating pressure and temperature. 5-hole injectors with two different nozzle hole diameters were measured at an injection pressure of 800 bar. The measurements were used to study the dynamic effects of the spray injection. Three dimensional numerical simulations of the spray based on a Lagrangian stocastic spray model of discrete droplets were performed. The pressure chamber images were used to validate the numerical spray simulations. Various models for the primary and secondary droplet breakup were investigated. The simulation results are presented along with a comparison of the measured and numerical spray injection showing good correlation regarding spray penetration and cone angle.