为探索水泵流量对整车冷却系统的影响，建立发动机GT-POWER模型和整车冷却系统GT-COOL模型，同时利用试验验证模型的准确性，并求取发动机热边界条件和散热器换热特性参数。建立散热器三维几何模型，利用CFD方法求取散热器的流动特性参数，将发动机模型和散热器模型在STAR-CCM+中耦合成一个系统，模拟整车冷却系统的工作过程。以某农用车的冷却系统为例，通过仿真求得其水泵流量在0.8 kg/s时散热器散热功率达到最大值10.489 kW，且发动机燃烧室壁面温度为523 K，较为合理。%To explore the influence of water pump flow on the vehicle cooling system, GT-POWER model of the engine and GT-COOL model of the vehicle cooling system have been established, which are verified through test, and heat boundary conditions of engine and parameters of radiator heat transfer characteristics are calculated. Then, 3D geometric model of radiator is established, and the flow characteristic parameters of the radiator is calculated with CFD method. Finally, the engine model and radiator are coupled in STAR-CCM+ to a system to simulate the operation process of the vehicle cooling system. With a cooling system of the farm tricycle as an example, it is concluded from simulation that a rational cooling effect can be achieved at water pump flow of 0.8kg/s, which enables the maximum radiator heat sink power of 10.489kW, and at 523K of engine combustion wall temperature.
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