基于Realizable k-ε湍流模型的山楂片热风干燥数值模拟  

Numerical simulation of hawthorn slice drying by hot air based on Realizable k-εturbulence model

作　　者：夏军勇 黎宇辉 XIA Junyong;LI Yuhui(College of Mechanical Engineering,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学机械工程学院,武汉430068

出　　处：《包装与食品机械》2023年第6期82-87,共6页Packaging and Food Machinery

基　　金：武汉市科技成果转化专项(2020030603012342)。

摘　　要：为解决某型山楂片干燥设备在干燥过程中存在的温度分布不均问题,采用数值模拟和试验研究的方法对山楂片干燥设备进行分析。基于Realizable k-ε湍流模型和DO辐射模型对干燥设备进行数值模拟,并通过自定义程序将PI温控算法应用于数值模拟中,以还原实际设备的温控系统。根据模拟结果对干燥设备进行结构优化。与原结构相比,优化结构后山楂片的平均温度由59.83℃提高至64.55℃,温度极差由13.45℃降至9.37℃,温度不均匀系数由6.20%降至4.30%。优化结构后的设备对山楂片的干燥效果优于原结构。研究构建热风干燥的多物理场模型,为改善物料干燥均匀性提供参考。In order to solve the problem of uneven temperature distribution in the drying process of a certain type of hawthorn slices drying equipment,numerical simulation and experimental research methods were used to analyze the hawthorn slice drying equipment.Based on the Realizable k-εturbulence model and DO radiation model,the drying equipment was numerically simulated,and the PI temperature control algorithm was applied to the numerical simulation through a customized program to restore the temperature control system of the actual equipment.The structure of drying equipment was optimized according to the simulation results.Compared with the original structure,the average temperature of hawthorn slices increased from 59.83℃to 64.55℃after optimization,the temperature range decreased from 13.45℃to 9.37℃,and the temperature non-uniformity coefficient decreased from 6.20%to 4.30%.The drying effect of the optimized drying equipment on the hawthorn slices is better than that of the original structure.In this study,a multi-physical field model of hot air drying was built,which provides a reference for improving the drying uniformity of materials.

关 键 词：山楂片 干燥设备 数值模拟 结构优化 PI温控算法 

分 类 号：TS205.1[轻工技术与工程—食品科学]