油菜籽过热蒸汽流化床常压干燥过程的数学模拟  

Simulation on rapeseed drying in superheated steam fluidized bed at atmosphere pressure

作　　者：宫英振[1] 牛海霞[1,2] 肖志锋[1] 刘相东[1] 杨德勇[1] 

机构地区：[1]中国农业大学工学院,北京100083 [2]内蒙古机电职业技术学院机电工程系,呼和浩特010051

出　　处：《农业工程学报》2010年第4期351-356,I0003,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家高技术研究发展计划(2007AA05Z217)

摘　　要：为提高过热蒸汽流化床干燥模型的模拟精度,该文基于过热蒸汽流化床干燥机理,结合"双流体"理论建立了描述过热蒸汽流化床干燥过程的非稳态轴对称二维数学模型。利用有限体积法求解模型,模拟研究了常压下油菜籽的过热蒸汽流化床干燥过程及其干燥动力学特性,模拟结果与试验数据相吻合。研究结果表明,该模型能够很好地描述常压下油菜籽的过热蒸汽流化床干燥过程和物料在干燥过程中的运动状态。In order to improve the precision of superheated steam fluidized bed drying model,an unsteady axisymmetric two-dimensional model was established based on the drying mechanism of superheated steam fluidized bed drying and Eulerian-Eulerian theory to simulate the process of superheated steam fluidized bed drying and the distributions of some parameters in this paper.The finite volume method was applied to solve the mathematical model.It showed that the simulated drying dynamic characteristics were coincidence with the experiment results,the established mathematical model could describe the drying process and the behavior of rapeseed during the superheated steam fluidized bed drying at atmosphere pressure.

关 键 词：干燥 动力学 流化床 过热蒸汽 双流体理论 数学模拟 

分 类 号：S375[农业科学—农产品加工] TS210.3[农业科学—农艺学]