脉冲气流中多孔物料干燥过程的数值分析──降速干燥段的模拟与计算  

Numerical Study on the Drying Process of Porous Materials in Pulsating Flow

作　　者：袁卫[1] 卓震[2] 

机构地区：[1]江苏石油化工学院能源工程系 [2]江苏石油化工学院机械工程系

出　　处：《常州大学学报（自然科学版）》1996年第4期46-51,共6页Journal of Changzhou University：Natural Science Edition

摘　　要：为强化多孔物料的传热传质过程，热载体设计成脉冲周期运行方式。在多孔物料的降速干燥阶段，针对其特有的运动形式与传热传质过程，提出了此阶段的气固两相流动的运动与传热传质模型。并对不同类型的物料可能出现的三种降速干燥曲线进行了数值计算。实际应用结果表明，模型的计算结果与实际的干燥过程能较好地吻合。有助于提高干燥过程的计算速度与精度。A mathematical model based on the regularity of the porous materials' momentum, heat and mass transfer in the falling rate period of drying is established. Numerical studies have been done in the three types of drying curvature processes. Applied in the actual designing, the method shows that this model describes the drying process of the pulsating flow quite well. It is effective and successful to use this method in desgning a pulsating flow dryer.

关 键 词：脉冲气流 多孔物料 传热 传质 

分 类 号：TQ02[化学工程]