应用二维轴对称模型的微波真空干燥数值模拟  

Numerical Simulation of Microwave Vacuum Drying Using Two-dimensional Axi-symmetric Model

作　　者：苏天一 张志军[1] 韩晶雪 SU Tian-yi;ZHANG Zhi-jun;HAN Jing-xue(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110004,China;Vacuum Dry Pump Business Division,SKY Technology Development CO.Ltd,Chinese Academy of Sciences,Shenyang 110179,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110004 [2]中国科学院沈阳科学仪器股份有限公司干泵事业部,辽宁沈阳110179

出　　处：《真空》2020年第4期60-65,共6页Vacuum

基　　金：国家自然科学基金(批准号:31371873,31000665,51176027,31300408)。

摘　　要：本文建立基于多孔介质的多物理场二维轴对称模型,对微波真空干燥过程进行数值模拟计算。通过数值模拟研究可知,随着微波真空干燥过程中环境压力的降低,干燥样品能在较低的温度下迅速干燥,有效提高样品干燥效率。但是,样品内部的温度及水分均匀性会随着环境压力的降低而变差。适当牺牲干燥量,降低总的微波能量输出或降低微波功率输出,可有效提高干燥样品的温度和水分的均匀性。In this article,a two-dimensional axi-symmetric model of multi-physical porous media is developed to numerically simulate the microwave vacuum drying process.It indicates that,with the increase of environmental vacuum degree during the microwave vacuum drying process,the dried samples can be dried rapidly at a lower temperature,thus the drying efficiency and product quality can be improved.The temperature and water uniformity inside the sample become worse with the increase of ambient vacuum.Therefore,scarification of acceptable amount of drying,decreasing of the total output microwave energy or microwave power can improve the temperature and water uniformity of dried samples.

关 键 词：微波真空干燥 二维轴对称模型 数值模拟 

分 类 号：TS255.1[轻工技术与工程—农产品加工及贮藏工程]