【目的】研究喷水推进器进口流道主参数对其性能的影响，为喷水推进器设计提供依据。【方法】基于STAR CCM+商业软件，通过定常RANS数值模拟研究了不同IVR工况下，喷水推进器进口流道轴线高度和进流角度对其水动力性能的影响，并根据ITTC的不确定度分析规程进行了数值不确定度分析。采用六面体结构化网格对计算域进行离散，采用Realizable k-ε 两层湍流模型对控制方程进行封闭，离散格式为二阶。压力-速度耦合计算选用SIMPLE算法。【结果】数值不确定度小于4%，表明本文采用的网格具有良好的收敛性，数值结果可靠。【结论】IVR=0.7~1.1时，进口流道效率较高；对于IVR较大的工况，应减小进流角；对于IVR较小的工况，可适当增加轴线高度，以改善出口不均匀度。
[Objectives] The effect of the key parameters of the inlet channel of the water-jet propeller on its hydrodynamic performance is studied, which provides a reference for the design of the water-jet propeller. [Methods]Based on the software STAR CCM+, the influence of the axis height and the inlet angle of waterjet inlet channel on the hydrodynamic performance under different IVR conditions is studied, through steady RANS numerical simulation. The numerical uncertainty analysis is carried out according to the ITTC uncertainty analysis procedure. In this paper, the computational domain is discretized as hexahedral structured grid. The governing equation is closured by the Realizable k-ε two-layer turbulence model and the discretization format is second-order. The SIMPLE algorithm is applied in the pressure-velocity coupling calculation. [Results]The numerical uncertainty is less than 4%, indicating great convergence of the grid in this paper and the reliability of the numerical results. [Conclusions]The efficiency of inlet channel is higher in the range of IVR=0.7~1.1. For large IVR, the inlet Angle should be reduced. For small IVR, the axis height can be appropriately increased to improve the outlet unevenness.