关键词: 油冷器；CFD；压降性能；多孔介质

Abstract: In order to accurately predict the pressure drop performance of the vehicle oil cooler, a computational fluid dynamics (CFD) simulation model of the pressure drop for the oil cooler is established and a text comparative study is carried out.Based on the k-omega shear stress transfer (SST) turbulence model and the porous media model, the problem is simplified modeling and the mesh independence verification is performed at the same time. The flow field simulation of the water side channel of the oil cooler is carried out to obtain the static pressure drop from the inlet to the outlet. Compared with the test data, at 40 L/min, the result predicted by CFD is 10.1% lower than the test value. The decomposition and analysis of the total pressure drop of the oil cooler shows that the internal channel contributes the most to the total pressure drop, accounting for 65.2%. The flow of each channel is relatively average, and for a single channel, except for the inlet splitter and outlet header, the flow in the middle fin area is mainly along the length direction, and the flow is relatively uniform, and there is a vortex structure in the inlet splitter.

Key words: Oil cooler; CFD; Pressure drop performance; Porous media