基于ANSYS CFX的棉纤维马克隆值的建模与仿真

doi:10.13475/j.fzxb.20190703106

纺织学报 ›› 2020, Vol. 41 ›› Issue (07): 29-34.doi: 10.13475/j.fzxb.20190703106

基于ANSYS CFX的棉纤维马克隆值的建模与仿真

张梦阳¹, 陈晓川¹(), 汪军², 李勇³

1.东华大学机械工程学院,上海 201620
2.东华大学纺织学院, 上海 201620
3.塔里木大学机械电气化工程学院, 新疆阿拉尔 843300

收稿日期:2019-07-08 修回日期:2019-11-28 出版日期:2020-07-15 发布日期:2020-07-23
通讯作者: 陈晓川
作者简介:张梦阳(1996—),女,硕士生。主要研究方向为流体力学应用和有限元仿真建模。
基金资助:
国家自然科学基金项目(11762020)

Modeling and simulation of cotton micronaire value based on ANSYS CFX

ZHANG Mengyang¹, CHEN Xiaochuan¹(), WANG Jun², LI Yong³

1. College of Mechanical Engineering, Donghua University, Shanghai 201620, China
2. College of Textiles, Donghua University, Shanghai 201620, China
3. College of Mechanical and Electronic Engineering, Tarim University, Alar, Xinjiang 843300, China

Received:2019-07-08 Revised:2019-11-28 Online:2020-07-15 Published:2020-07-23
Contact: CHEN Xiaochuan

摘要/Abstract

摘要：

为探究棉纤维马克隆值与棉纤维质量关系紊乱的原因,取棉纤维的平均直径和成熟度为自变量,推导棉纤维气流仪工作的原理方程。选择6种棉样进行实验,通过测量棉纤维在等压差、等密度情况下的入口流量和马克隆值,采用中段称重法和显微镜法分别测量棉纤维的线密度和成熟度,将该值与利用公式计算的流量值进行比较分析。结果表明,等压差下通过气流入口的流量值与棉纤维成熟度和直径乘积的平方大致成正比。仿照棉纤维的结构,根据直径和成熟度构造棉纤维透气性模型,利用ANSYS CFX仿真软件进行仿真。仿真结果与实验值的最大相对误差为7.92%,证明了该模型的有效性,为修正棉纤维的Kozeny-Carman常数,进一步提高计算准确率提供参考。

关键词: 棉纤维, 马克隆值, 平均直径, 成熟度, ANSYS CFX仿真

Abstract:

In order to explore the causes for the disorder between cotton fiber micronaire value and cotton fiber quality, the working principle equation of cotton fiber airflow meter was deduced by taking the average diameter and maturity of cotton fiber as independent variables. Firstly, the flow rate of cotton fiber sample and micronaire value was measured under the condition of equal pressure and density, followed by the measurement of the fineness and maturity of six different types of cotton fiber sample using mid-section weighing method and microscopy method respectively. The values were compared with the flow rate calculated using the equation. The results show that the flow through the air inlet is approximately proportional to the square of the product of maturity and diameter of cotton fibers under a constant pressure difference. The permeability model of cotton fibers was constructed by imitating the structure of cotton fibers. According to diameter and maturity, the simulation was carried out by using ANSYS CFX simulation software. The maximum relative error between simulated and experimental results is 7.92%, which proves the validity of the model. It lays a foundation for modifying the Kozeny-Carman constant of cotton fibers and for improving the accuracy of calculation.

Key words: cotton fiber, micronaire value, average diameter, maturity, ANSYS CFX simulation

中图分类号:

TS117

张梦阳, 陈晓川, 汪军, 李勇. 基于ANSYS CFX的棉纤维马克隆值的建模与仿真[J]. 纺织学报, 2020, 41(07): 29-34.

ZHANG Mengyang, CHEN Xiaochuan, WANG Jun, LI Yong. Modeling and simulation of cotton micronaire value based on ANSYS CFX[J]. Journal of Textile Research, 2020, 41(07): 29-34.

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参考文献 10

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棉样编号	马克隆值	体积流量/ (L·min^-1)	线密度/ mtex	成熟度比	成熟度
1^#	4.12	3.42	208.69	0.74	0.43
2^#	4.98	4.51	196.89	1.09	0.63
3^#	4.83	4.17	230.83	0.83	0.48
4^#	4.02	3.42	204.13	0.74	0.43
5^#	4.46	3.83	185.02	0.95	0.55
6^#	4.89	4.31	229.64	0.80	0.46

棉样编号	流量/(10^-6 kg·s^-1)		相对误差/%
棉样编号	计算值	实验值	相对误差/%
1^#	73.49	68.74	-6.92
2^#	98.55	90.63	-8.74
3^#	85.98	83.70	-2.72
4^#	66.40	68.74	3.40
5^#	79.26	76.87	-3.12
6^#	80.81	86.46	6.53

棉样编号	直径/μm	体积/(10^-6cm³)
1^#	20.63	11.85
2^#	16.28	14.28
3^#	20.11	12.60
4^#	19.78	11.78
5^#	16.79	13.50
6^#	20.20	12.35

棉样编号	流量/(10^-10 kg·s^-1)		仿真流量相对误差/%
棉样编号	实验值	仿真值	仿真流量相对误差/%
1^#	68.74	68.91	-0.25
2^#	90.63	97.80	-7.92
3^#	83.70	83.84	-0.17
4^#	68.74	64.78	5.75
5^#	76.87	78.44	-2.04
6^#	86.46	83.84	3.03

基于ANSYS CFX的棉纤维马克隆值的建模与仿真

Modeling and simulation of cotton micronaire value based on ANSYS CFX

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