The cavitation phenomenon in diesel engine injector control ball valves under high-pressure conditions leads to deteriorated emission performance and reduced reliability. The selection of turbulence and cavitation models is critical for numerical investigation of such cavitation issues. Based on the Winklhofer microchannel fuel test, three Large Eddy Simulation (LES) turbulence models and three cavitation models were employed to construct a microchannel simulation framework, with comparative analysis conducted between numerical results and experimental data. The results demonstrate that model combinations incorporating the FRP cavitation model exhibit significant advantages in predicting cavitation distribution characteristics. Consequently, the two optimal model combinations, WALE+FRP and Dynamic Smagorinsky+FRP, were selected for numerical simulation of a two-dimensional control ball valve.The simulation results show good consistency with visualization tests of the actual-size injector control ball valve, validating the accuracy of the proposed methodology.

喷油器,空化模型,大涡模拟,可视化试验,模型对比