为了系统研究入口流速参数对中冷器换热性能的影响，通过计算流体力学（CFD）方法，建立了基于代表性单元的两级中冷器整体三维数值模型。研究采用 k-ω SST湍流模型，完成网格无关性验证并与试验数据对比，模型精度满足工程要求。通过分析一级和二级中冷器在不同水侧入口流速下的温度分布、散热量及气侧压降，得出以下结论：一级中冷器进水流量最佳值为10 m³/h，且应大于2.5 m³/h，以防止冷却水汽化；二级中冷器进水流量最佳值为20 m³/h；增大水侧流量可显著改善温度分布均匀性。研究发现气侧入口流速存在明显分布不均现象，建议气侧流速控制在1.75 m/s内，以优化流动均匀性。

In order to systematically study the impact of inlet flow velocity parameters on the heat transfer performance of intercooler, a three-dimensional numerical model of a two-staged intercooler based on a representative unit was established using computational fluid dynamics (CFD) method. Using the k-ω SST turbulence model, grid independence verification and the comparison between simulation results and experimental data were carried out, and it was confirmed that the model accuracy was able to meet engineering requirements. By analyzing the temperature distribution, heat dissipation, and air-side pressure drop of the first and second stage intercoolers under different water-side inlet flow velocities, the following conclusions were drawn.The optimal water flow rate for the first stage was 10 m³/h, and it should be greater than 2.5 m³/h to prevent coolant vaporization.The optimal water flow rate for the second stage is 20 m³/h; increasing the water-side flow rate could significantly improve temperature distribution uniformity. In addition, it was found that the air-side inlet flow velocity exhibited obvious uneven distribution, and hence it was recommended to control the air-side flow velocity within 1.75 m/s to optimize flow uniformity.