均匀平铺载荷下微波干燥室内的能量分布  

Distribution of power density in microwave drying chamber under uniform loading conditions

作　　者：董铁有[1] 朱文学[1] 木村俊范[2] 吉崎繁[2] 

机构地区：[1]洛阳工学院机械设计工程系,洛阳市471003 [2]日本筑波大学农林工学系

出　　处：《食品与机械》2002年第2期24-25,27,共3页Food and Machinery

摘　　要：对均匀平铺的典型载荷条件下微波干燥室的能量分布特性进行了研究。根据实验数据分析可知当具有较大的介电常数的物料均匀平铺在干燥床上时 ,微波干燥室内的能量分布可根据天线的辐射能分布瓣型来确定。理论上 ,在微波干燥床上的XZ面内的θ=± 2 4°50′50″范围内及YZ面内的θ =±Distribution of microwave radiation power density on the drying bed in a typically structured microwave drying chamber was analyzed based on the antenna theory and experimental data.The results showed that,when material with a relatively large dielectric loss factor to be dried was spread fully over the drying bed in a drying chamber,which was the most common condition for large scaled microwave drying,the material on the drying bed would first absorb most of the radiation energy of the incident microwave from the mouth of the microwave guide connected with the drying chamber.The distribution of microwave radiation power density on the drying bed could be determined by analyzing the radiation pattem of the open-ended microwave guide.

关 键 词：均匀平铺载荷 微波干燥室 能量分布 反射特性 

分 类 号：TS205[轻工技术与工程—食品科学]