不同结构板翅式油冷器单层冷却液侧换热特性的数值模拟

Numerical Simulation of Monolayer Coolant-Side Heat Transfer Characteristics for Plate-Fin Oil Coolers With Different Structures

基于多孔介质模型,针对5种内部结构不同的板翅式油冷器单层冷却液侧的流动和热输运过程,利用有限体积法进行数值模拟.研究结果表明:在翅片布置方向相同情况下,进出口对角布置时冷却液的压力和温度场分布比同侧布置进出口时均匀,温差较同侧布置时大.在出口位置相同情况下,翅片横向布置时冷却液的压力和温度分布要比纵向布置时均匀,但压差大,温差不大.带隔板结构冷却液的温差最大,但压差要高一个数量级.

Based on the porous medium model, the monolayer coolant-side flow and heat transfer in the plate-fin off coolers with 5 kinds of structures were numerically simulated by means of the finite volume method. The results indicate that the distribution of pressure and temperature is more even and the temperature difference is larger when the inlet and outlet are diagonally positioned than they are positioned on the same side, with the fins＇ layouts in the same direction. Given the same outlet positions, the distribution of pressure and temperature in the case of transverse arrangement of fins is more even, and the pressure difference is larger than those in the case of vertical arrangement, while similar temperature differences occur in both cases. The plate-fin oil cooler with clapboards has the biggest temperature difference as well as pressure difference 1 order of magnitude higher than that of other structures.