谷物干燥塔内气流组织模拟及结构优化

Airflow Tissue Simulation and Structure Optimization of Grain Drying Tower

为探究干燥塔内部结构的合理性,以华北区域内普遍采用的150T/D型玉米干燥塔为研究对象;基于GAMIT软件搭建干燥塔模型,运用FLUENT软件对空载状态下的塔内干燥介质在不同方向所呈现出的流场轨迹进行模拟。模拟结果表明:干燥介质在一次风干燥段与二次风干燥段中的X、Y与Z三个方向上所呈现出的均匀性与贯穿性较差。通过对空载状态下实际运行的干燥塔的排汽速度进行测量,与模拟所得到的结果进行对比,印证模拟结果的准确性。针对该规格塔内干燥介质的贯穿性与均匀性相对较差的现象,改变干燥塔内部结构来探究其流场变化;通过模拟对比发现,改造后的塔内干燥介质的流场均匀性与贯穿性均得到一定程度的改善,为今后的制造提供了参考依据。

In order to explore the rationality of the internal structure of the drying tower,the 150T/D corn drying tower commonly used in North China was selected as the research object.The drying tower model was built based on GAMIT software,and flow trajectories track that the dry medium worked in different directions under no-load conditions inside the tower was simulated by the FLUENT software.The simulation results show that the uniformity and penetration of the drying medium in the three directions of X,Y and Z in the primary air drying section and the secondary air drying section are poor.By measuring the venting speed of the drying tower under no-load conditions and comparing simulation results,the accuracy of the simulation results could be verified.In view of the relatively poor penetration and homogeneity of the drying medium in the tower,the internal structure of the drying tower was changed to explore its flow field changes.Through simulation and comparison,it is found that the flow field uniformity and penetration of the modified drying medium in the tower have been improved to a certain degree,which provides a reference for future manufacturing.