To study the cavitation occurring in diesel nozzle and its effects on the flow capacity,the process of cavitation and the flow characteristics in diesel injector orifice were analyzed based on optical testing and three-dimensional CFD simulation. In the experiment,the visualization of cavitation was recorded by a high-speed camera,the frame rate was set to 6 688 frames per second. The high-frequency Kistler pressure transducers were assembled before and after the nozzle to acquire pressure. Ultimately,the d...