Numerical simulation of injection rate of each nozzle hole of multi-hole diesel injector

• Published in: Applied thermal engineering 2016-09, Vol.108, p.793-797
• Main Authors: Wu, Xiwen, Deng, Jun, Cui, Huifeng, Xue, Fuying, Zhou, Liying, Luo, Fuqiang
• Format: Article
• Language: English
• Subjects: Diesel engine; Each nozzle hole; Multi-hole injector; Numerical simulation; The injection rate
• ISSN: 1359-4311
• DOI: 10.1016/j.applthermaleng.2016.07.136

•A three-dimensional gas-liquid two-phase model of cavitation flow was developed.•Taking the effect of injection conditions on bubble number density into account.•The model can be used to simulate the injection rate of each nozzle hole accurately. The relative differences in injection rates within nozzle holes of multi-hole diesel injectors significantly influences the combustion and emission characteristics of diesel engines. To study systematically the injection rate of each nozzle hole of a multi-hole diesel injector, a three-dimensional gas-liquid two-phase model of cavitation flow was developed, taking the influence of injection conditions on bubble number density into consideration. To verify validity of the model, the injection rate of each nozzle hole of the injector was experimentally measured on a fuel injection system based on the transient measurement of spray momentum flux. The compared results of the measured and simulated injection rates of each nozzle hole shows that the developed model has relatively high precision and can be used to simulate the injection rate of each nozzle hole accurately.