纳米纤维包芯纱截面方向热湿耦合传递过程的模拟  

Simulation of coupled thermal-moisture transfer in cross-section of nanofiber core-spun yarns

作　　者：何满堂 郭俊泽 王黎明 覃小红[1] HE Mantang;GUO Junze;WANG Liming;QIN Xiaohong(College of Textiles,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学纺织学院,上海201620

出　　处：《纺织学报》2024年第8期142-149,共8页Journal of Textile Research

基　　金：中央高校基本科研业务费专项资金资助项目(2232023A-05);东华大学博士研究生创新基金项目(CUSF-DH-D-2022039)。

摘　　要：针对纳米纤维包芯纱截面热湿耦合传递过程难以直接测试的问题,利用有限元仿真软件COMSOL对纳米纤维包芯纱的截面进行建模及参数化设置,使用多物理场耦合的方式模拟了纳米纤维包芯纱截面方向的热湿传递过程,以探寻水分和热量在纱线内部传递的规律。建立了不同纳米纤维含量及孔径的纳米纤维包芯纱模型,探寻热湿耦合传递速度的影响因素与规律。研究结果表明:相同时间内纱线内部水分传递速度快于热量的传递,且在相同的流入速度下,纳米纤维的引入能够加速水分在纳米纤维包芯纱中的传递速度,比棉纱的水分传递速度提高了28.3%;此外,适当增加纳米纤维的含量,纳米纤维包芯纱的热湿耦合传递速度有一定的提高(约11.8%);随着纳米纤维孔径的减小,孔径数量增多,纳米纤维包芯纱的水分传递速度提高至90%(与棉纱相比),传热速度增加显著,证明纳米纤维包芯纱的热湿耦合传递过程中导湿和传热呈现正相关性。Objective The selection of fiber or yarn material is very important for the design of thermal-moisture comfort textiles.Compared with traditional yarns,nanofiber core-spun yarns have both the mechanical properties of traditional yarns and the surface effect and small size effect of nanofibers,which is beneficial for preparing thermal-moisture management textiles.In order to control thermal-moisture management performance of nanofiber core-spun yarn,the theoretical research on thermal-moisture transfer is indispensable.However,the current theoretical research on thermal-moisture management of nanofiber core-spun yarns mainly focuses on the experimental research or mathematical model research,and lacks the simulation research on thermal-moisture transfer process.Method The finite element software COMSOL,which is suitable for multi-physics coupling,is selected to model and simulate the yarn section direction by finite element simulation method.The section of cotton yarn and nanofiber core-spun yarn are modeled and parameterized,and the thermal-moisture transfer process of yarn section is quantitatively studied by the configuration of laminar flow and heat transfer physical field.Results The cross-section models with different parameters of traditional yarn(cotton yarn)and nanofiber(polyacrylonitrile nanofiber)core-spun yarn were established by using the geometric modeling function of COMSOL software,after multi-physical field coupling numerical calculation.Under the condition of the same inflow velocity,the average outflow velocity of PAN nanofiber core-spun yarn was 0.0068 m/s,while that of cotton yarn was 0.0053 m/s.At the center line position of the model,when the temperature was the same,the nanofiber core-spun yarn transferred farther,indicating that PAN nanofiber core-spun yarn had faster thermal transfer capacity than the cotton yarn.In order to explore the effect of nanofiber content on the thermal and moisture coupling transfer performance of yarns,a physical model of a yarn with nanofiber core and with dif

关 键 词：纳米纤维包芯纱 热湿耦合传递 模拟 功能性纺织品 热湿管理纺织品 

分 类 号：TS104.76[轻工技术与工程—纺织工程] TS102[轻工技术与工程—纺织科学与工程]