PRIMARY BREAK-UP MODEL FOR DIESEL JETS BASED ON LOCALLY RESOLVED FLOW FIELD IN THE INJECTION HOLE

摘要: A primary breakup model has been developed b ased o n locally resolved p roperties of the ca vitating ozzle flow. According to this turbulent l ength scale determines droplet size. mixed aerodynamic/turbulent approach is used calculate break-up rate. The droplets are released from surface a coherent liquid core calculated mass balance. delivers initial size and velocity distribution for discrete model. c haracteristic feature results i s remarkable symmetry spray shape. direction deviated towards where cavitation more pronounced with largest angle in plane maximum cavitation. These confirmed by recent experimental findings. implemented into FIRE CFD-code applied Diesel injection. Validation presently done using data AVL Chalmers University showing both, formation simultaneously.