织物射流冲击干燥下温度变化数值模拟  

Numerical Simulation of Temperature Change of Fabric under Jet Impingement Drying

作　　者：李俊[1] 钱淼 马成章 

机构地区：[1]浙江理工大学机械工程学院,浙江 杭州

出　　处：《建模与仿真》2023年第1期331-341,共11页Modeling and Simulation

摘　　要：本文针对织物射流冲击干燥特性建模中对流换热系数与主流温度设定困难的问题,采用UDF程序对ANSYS FLUENT进行二次开发,耦合了射流冲击外流场供热与织物内水分蒸发过程,建立了射流冲击下织物干燥特性模型,探索了热风速度、热风温度、织物密度、织物厚度等参数对冲击干燥下织物温度的影响,研究了5种不同织物干燥过程的温度变化曲线差异,并开展相关实验验证。结果表明:针对不同织物材料参数,织物克重对织物干燥特性影响最大,比热容影响最小,孔隙率和材料密度的影响类似;对不同种类织物,棉织物表观密度最大,所需干燥时间最长约56 s,聚脂纤维表观密度最小,所需干燥时间为最短约33 s;该研究可为印染热定型设备设计与生产工艺参数优化提供理论参考,具有较好的社会效益与经济效益。In order to solve the problem that it is difficult to set the convective heat transfer coefficient and the mainstream temperature in the modeling of the jet impact drying characteristics of porous fabrics, the software ANSYS FLUENT was secondary developed by using the UDF program. The external sup-ply of heat and the water evaporation process in the porous fabric under the jet impact were cou-pled, and the drying characteristics model of the fabric under the jet impact without convective heat transfer coefficient was established. The effect of hot wind velocity, hot wind temperature, fab-ric density, fabric thickness and other parameters on the temperature of the porous fabric under impact drying was explored. The differences in the temperature variation curves of five different fabrics during the drying process were studied. And build related experiments to verify the simula-tion model. The results show that: for different fabric material parameters, the fabric weight has the greatest influence on the drying characteristics of the fabric, and the specific heat capacity has the least influence. The influence of porosity and material density is similar. For different types of fab-rics, cotton fabric has the highest apparent density and the longest drying time is about 56 s, while polyester fiber has the lowest apparent density and the shortest drying time is about 33 s. This study can provide theoretical reference for the design of printing and dyeing heat setting equip-ment and the optimization of process parameters, and has good social and economic benefits.

关 键 词：温度变化曲线 织物厚度 织物材料 织物密度 设计与生产 射流冲击 克重 干燥特性 

分 类 号：TS1[轻工技术与工程—纺织科学与工程]