基于分形理论的谷物干燥试验研究

Grain drying experiments based on fractal theory

研制了小型谷物流化干燥试验台,根据分形多孔介质导热理论建立了干燥水分输运模型,最后进行谷物干燥试验研究,分析了各个参数对干燥特性的影响。试验分析结果表明:在相同试验条件下,通入热风温度越高、风速越大、颗粒分形维数越大,其干燥速率越快,并且所建立的理论模型与干燥曲线变化规律相吻合。

A set of small grain fluidization drying test equipment was designed and a drying moisture transport model was established according to the theory of fractal porous medium heat conduction to study grain drying experiments,and the effects of various parameters on the drying characteristics were analyzed.The results showed that under the same conditions,the drying rate was accelerated with higher hot air temperature,faster wind speed,and larger particles fractal dimension; the established theoretical model could explain drying curve well.