基于多孔介质模型对玉米干燥过程进行数值模拟，研究不同导流方案对顺逆流烘干塔内气流流动和热量传递的影响。通过数值模拟及实验研究了角状盒排布方式对塔内温度场和速度场的影响。结果表明：角状盒交叉式排布可以提高传热传质效率，减少热量损失，解决干燥不均匀问题。同时，入风口速度的增加也能改善温度分布的不均匀性，改善干燥效果。可见，在用于玉米干燥的顺逆流烘干塔设计中，应充分考虑角状盒的排布方式以及入风口速度这两个关键因素。烘干塔结构的优化可以提升整体的干燥效率和玉米品质。研究结果为玉米干燥产业降低成本、提高玉米品质提供了有益参考。

The effects of different diversion schemes on air flow and heat transfer in a countercurrent drying tower were studied by numerical simulation of maize drying process based on porous medium model. The influence of the angle box arrangement on the temperature field and velocity field in the tower was studied by numerical simulation and experiment. The results show that the cross arrangement of corner boxes can improve heat and mass transfer efficiency, reduce heat loss and solve the problem of uneven drying. At the same time, the increase of the inlet speed can also improve the uneven temperature distribution and improve the drying effect. It can be seen that the two key factors, the arrangement of the corner box and the inlet speed, should be fully considered in the design of the counter-current drying tower for corn drying. The optimization of drying tower structure can improve the overall drying efficiency and corn quality. The conclusion of this paper provides a useful reference for corn drying industry to reduce the cost and improve the quality of corn.