干燥箱内温度场和气流场的建模仿真与试验研究

The Experimental Study and Modeling Simulation Research on the Temperature Field and the Airflow Field in the Drying Oven

研究干燥箱内苜蓿草捆的不同放置方式对其温度场和气流场的影响,建立干燥箱的三维仿真模型,运用流体动力学软件对干燥箱体内苜蓿干燥过程中的温度场和气流场进行数值模拟,分析了在有效干燥时间内长宽高均为10cm的苜蓿草捆竖放、横放、斜放45°与斜放135°情况下干燥箱内气流场变化情况。结果表明,苜蓿横放时,速度分布最均匀,入口风速可以被充分利用,干燥效果最好。通过实验数据与数值模拟结果的比较,证明苜蓿草的数值模拟对深入研究干燥箱内部的热空气流动具有重要意义,为干燥滚筒的设计及热效率的提高提供指导。

The temperature and airflow field in different placed way in drying oven is researched.Drying process of alfalfa is simulated numerically using fluid dynamics software.Airflow field of Clover bundle is analyzed in the case of vertical,horizontal,inclined 45°and inclined 135°.Its length,width and height are 10 centimeters.The results show that the velocity distribution is uniform and drying effect is best when the alfalfa is horizontal.It is important to the hot air flow through the compare of experimental data and numerical simulation results.It will provide guidance for the design of dying drum and the improvement of thermal efficiency.