基于ANSYS CFX的织物透气性数值计算  

Numerical calculation of fabric air permeability based on ANSYS CFX

作　　者：代文杰 邱华[1] 杨恩惠 王宁 闫正林 DAI Wenjie;QIU Hua;YANG Enhui;WANG Ning;YAN Zhenglin(Key Laboratory of Eco-Textiles,Ministry of Education,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学生态纺织教育部重点实验室,江苏无锡214122

出　　处：《丝绸》2018年第9期51-56,共6页Journal of Silk

基　　金：江苏省产学研项目(BY2016022-14);江南大学创新计划项目(2017234Y)

摘　　要：为了快速设计出透气性符合实际要求的织物,并研究气流在织物内部的运动和压力、压强的变化规律,文章提出了利用ANSYS CFX对织物透气性进行数值计算的方法。首先建立织物模型,再在此基础上对织物模型进行处理,然后对不同压强下的织物进行数值计算。结果表明:气流主要通过织物孔隙和纱线之间的间隙,并且通过孔隙时由于迁移加速度的存在速度会增加;通过空隙时在纱线表面会存在很大的剪切力和压力;模拟值与实验值进行比较得到的模拟误差小于16%,所以得到的模型可以反映织物的实际特征。造成误差的主要原因包括:测试偶然误差、模型参数误差、边界条件与测试条件之间的差别。In order to rapidly design fabrics whose air permeability meets the actual requirements,and study the changing rules of movement,pressure and pressure intensity of air flow inside the fabric,a method was proposed to numerically calculate the air permeability of fabric by using ANSYS CFX.Firstly,the fabric model was established and processed.Then,the fabrics are numerically calculated under different pressure intensity.The results show that the airflow mainly passed through the gap between the fabric pores and the yarn,and the speed would increases due to the migration acceleration when passing through the pores.There is large shear force and pressure on the yarn surface when passing through the voids.The simulation error obtained by comparing the simulation value with the experimental values was less than 16%,so the model can reflect the actual characteristics of the fabric.The main causes of errors include:accidental errors of test,model parameter errors,and differences between boundary conditions and test conditions.

关 键 词：织物模型 布尔运算 ANSYS 网格 有限元 

分 类 号：TS101.1[轻工技术与工程—纺织工程]