关键词: 发动机冷却模块；冷却风扇；CFD 仿真软件

Abstract: In order to effectively optimize the heavy truck engine cooling module, this paper takes the engine cooling module of a domestic heavy truck dump in China as the research object, uses the computational fluid dynamics analysis software CFD STAR CCM+, uses the K-Omega turbulence model and the MRF multiple reference frame model to analyze the flow field of the cooling module, cooling fan and engine compartment of the whole machine. The simulation analysis was carried out, and the average wind speed passing through the surface of the radiator, intercooler and condenser in the cooling module was obtained under the two working conditions of power point and torque point, respectively. The CFD simulation results show that a one-dimensional simulation model is established in Kuli software to obtain the radiator liquid temperature difference and the intercooling temperature rise under the power point and torque point conditions, and then the radiator liquid temperature difference and the intercooling temperature rise are compared with the target. Values are compared to draw conclusions about whether the selected cooling module can meet the cooling requirements of the engine. The application of CFD software can highly improve the efficiency and accuracy of cooling module choice comparing with the traditional choice method, and set solid foundation the cooling system forward design.

Key words: Engine cooling module; Cooling Fan; CFD analysis software