Numerical Simulation and Analysis of Two-Phase Flow of Inner Cavitation in Injection Nozzles

Based on the analysis of the phenomenon of cavitation flow in the nozzles of diesel injection, a two-dimension and two-phase model of cavitation flow in nozzle was developed for a well-developed cavitation flow and the simulation on gas-liquid two-phase flow was conducted. The calculated results from the model have good agreement with the experimental results available in the literatures. With the model the effect of pressure difference between upstream and downstream, the corner radius of the nozzle inlet, the nozzle hole diameter and length on the cavitation location in injection nozzle and the spray characteristics were analyzed.