碳纤维织物在热流冲击下的热传递数值模拟

doi:10.13475/j.fzxb.20180704006

纺织学报 ›› 2019, Vol. 40 ›› Issue (06): 38-43.doi: 10.13475/j.fzxb.20180704006

碳纤维织物在热流冲击下的热传递数值模拟

郑振荣¹^,²(), 智伟¹, 韩晨晨¹, 赵晓明¹, 裴晓园¹

1.天津工业大学纺织科学与工程学院, 天津 300387
2.天津工业大学先进纺织复合材料教育部重点实验室, 天津 300387

收稿日期:2018-07-16 修回日期:2019-03-11 出版日期:2019-06-15 发布日期:2019-06-25
作者简介:郑振荣(1981—),女,副教授。主要从事功能防护纺织品的开发。E-mail: tianjinzhengzr@163.com。
基金资助:
天津市科委自然科学基金项目(18JCYBJC86600);中国纺织工业联合会科技指导性项目(2017030, 2018051);天津市教委科研计划项目(2018KJ194)

Numerical simulation of heat transfer of carbon fiber fabric under impact of heat flux

ZHENG Zhenrong¹^,²(), ZHI Wei¹, HAN Chenchen¹, ZHAO Xiaoming¹, PEI Xiaoyuan¹

1. School of Textile Science and Engieering, Tianjin Polytechnic University, Tianjin 300387, China
2. Key Laboratory of Advanced Textile Composites of Ministry of Education, Tianjin Polytechnic University, Tianjin 300387, China

Received:2018-07-16 Revised:2019-03-11 Online:2019-06-15 Published:2019-06-25

摘要/Abstract

摘要：

为研究纺织材料在热流冲击下的热传递性能,以碳纤维平纹织物为例,利用电子显微镜获得纱线的几何结构参数、经纬纱交织路径及横截面形状,建立碳纤维织物单元结构模型,基于传热学的基本方程,利用有限元法数值求解织物厚度方向上的温度随时间变化曲线。结果表明:利用创建的热流冲击下织物热传递数值模型可预测织物背面温度随时间变化的情况;试验验证发现,利用数值模型计算获得的织物背面温度随时间的变化趋势与试验结果一致,当织物表面分别施加热流密度为1 319 W/m²和1 103 W/m²时,织物背面温度的模拟值和试验值的平均相对误差分别为6.64%和3.28%。说明所建立的数值模型能较好地反映碳纤维平纹织物动态传热过程,可为高温热流冲击下隔热耐烧蚀织物的开发和性能优化提供理论参考。

关键词: 碳纤维织物, 热传递, 三维几何模型, 数值模拟, 热流密度

Abstract:

In order to study the heat transfer performance of textile materials under the impact of convective heat flux, taking the carbon fiber plain weave fabric as an example, the geometric parameters of yarn, the weaving path and cross-section shape of warp and weft yarns were obtained by scanning electron microscopy. Then a 3-D structural model of carbon fiber fabric was established. Based on the basic equation of heat transfer, the temperature variation curve in the direction of fabric thickness was solved numerically by finite element method. The results show that the heat transfer numerical model can be adopted to predict the temperature of the fabric back changing with time. It is found by experiments that the variation trend of fabric back temperature obtained with the numerical model is correlated with the experimental results. When heat flux is 1 319 W/m² and 1 103 W/m², respectively, the average relative errors of simulated and experimental values of fabric back temperature are 6.64% and 3.28%. It is indicated that the numerical model can better reflect the dynamic heat transfer process of carbon fiber fabric, which can provide an effective theoretical reference for the development of heat protective fabrics under high heat flux in the future.

Key words: carbon fiber fabric, heat transfer, 3-D geometric model, numerical simulation, heat flux density

中图分类号:

TS101.3

郑振荣, 智伟, 韩晨晨, 赵晓明, 裴晓园. 碳纤维织物在热流冲击下的热传递数值模拟[J]. 纺织学报, 2019, 40(06): 38-43.

ZHENG Zhenrong, ZHI Wei, HAN Chenchen, ZHAO Xiaoming, PEI Xiaoyuan. Numerical simulation of heat transfer of carbon fiber fabric under impact of heat flux[J]. Journal of Textile Research, 2019, 40(06): 38-43.

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材料	质量密度/ (kg·m^-3)	导热系数/ (W·m^-1·K^-1)	定压比热容/ (J·kg^-1·K^-1)
空气	1.06	0.029	1 005
碳纤纱	1 798.90	0.528	1 318

碳纤维织物在热流冲击下的热传递数值模拟

Numerical simulation of heat transfer of carbon fiber fabric under impact of heat flux

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