改进转杯纺输纤通道气流场及其纤维伸直形态的模拟

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改进转杯纺输纤通道气流场及其纤维伸直形态的模拟

Simulation of flow field and fiber straightening in reconstructed fiber transport channel in rotor spinning

改进转杯纺输纤通道气流场及其纤维伸直形态的模拟

Simulation of flow field and fiber straightening in reconstructed fiber transport channel in rotor spinning

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doi:10.13475/j.fzxb.20240906601

纺织学报 ›› 2025, Vol. 46 ›› Issue (02): 100-105.doi: 10.13475/j.fzxb.20240906601

张定眺¹, 王倩茹¹, 邱芳², 李凤艳¹^,²()

1.天津工业大学纺织科学与工程学院, 天津 300387
2.江苏中纺联检验技术服务有限公司, 江苏苏州 215228
3.浙江灏宇科技有限公司,浙江绍兴 312369

收稿日期:2024-09-26 修回日期:2024-11-29 出版日期:2025-02-15 发布日期:2025-03-04
通讯作者: 李凤艳(1978—),女,副教授,博士。研究方向为纺织纤维、纱线及产品开发。E-mail:fengyanli@tiangong.edu.cn。
作者简介:张定眺(2000—),男,硕士生。主要研究方向为新型纺纱流场数值模拟。
基金资助:
国家自然科学基金项目(51403152)

ZHANG Dingtiao¹, WANG Qianru¹, QIU Fang², LI Fengyan¹^,²()

1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
2. United Testing Services (Jiangsu)Co., Ltd., Suzhou, Jiangsu 215228, China
3. Zhejing Haoyu Technology Co., Ltd.,Shaoxing, Zhejiang 312369, China

Received:2024-09-26 Revised:2024-11-29 Published:2025-02-15 Online:2025-03-04

摘要：

为研究输纤通道对弯钩纤维伸直效果的影响,采用流体力学数值模拟方法模拟了改进前后输纤通道内气流场的分布状态,并借助离散元软件建立了柔性纤维模型,利用两相流耦合方法求解弯钩纤维在气流场中的伸直变化过程,讨论了弯钩纤维的伸直效果。结果表明:改进输纤通道内的高速气流区域相对原输纤通道占比较大,对弯钩纤维的加速伸直效果更好;弯钩纤维在改进输纤通道中能更早到达通道出口,且伸直效果优于原输纤通道。改进输纤通道对后弯钩纤维的伸直效果提升更加明显。该研究通过数值模拟的方法分析了弯钩纤维伸直过程,为转杯纺输纤通道等关键部件的设计提供指导。

关键词: 转杯纺, 输纤通道, 弯钩纤维, 纤维伸直度, 数值模拟

Abstract:

Objective The geometry of the fiber transport channel in rotor spinning will change the distribution of the internal airflow field, and the airflow field greatly influences morphological changes in fiber movement. To study the influence of the fiber transport channel on the straightening effect of hooked fiber, the distribution state of the airflow field in the channel before and after reconstruction was simulated by using the fluid mechanics numerical simulation method.

Method A Laval tube fiber transport channel model was designed using SolidWorks software, and airflow motion state inside the reconstructed channel was simulated by Fluent, and the flexible hooked fiber model was established by EDEM. Based on the airflow field data obtained from Fluent simulation calculation, combined with the solid-liquid two-phase flow coupling method in EDEM, the shape change of hooked fibers in the airflow of the fiber transport channel was simulated to study the effect of different types of hooks on the straightening process of hooked fibers.

Results The maximum air velocity difference between the reconstructed fiber transport channel and the original is 6.63%, but high-speed airflow in the reconstructed fiber channel is relatively large, especially the area of high-speed airflow L₃ section near the outlet is obviously larger than the original fiber channel outlet. When improving the movement of fibers in the fiber transport channel, the hooked fiber reached the high-speed airflow area earlier and the speed of the fiber head was increased, beneficial to the straightening of the hooked fiber. The hooked fiber in the reconstructed fiber channel was basically straight, while the fiber in the original fiber channel was not straight even when fiber reached the exit. According to the result of the straightness, the airflow field distribution in the reconstructed fiber transport channel was more conducive to the straightening of the hooked fiber. In comparison with the tradiational fiber transport channel, straightness of trailing right hooked fibers Ⅱ is increased from 88.70% to 97.80%.

Conclusion The airflow field of the reconstructed fiber transport channel in rotor spinning has a larger area of high-speed airflow compared with that of the original channel, which is more effective in accelerating the straightening of hooked fibers. Hooked fibers in the reconstructed fiber transport channel reach the channel outlet earlier and straighten better than in the original channel. The straightening effect of the reconstructed channel on the trailing hooked fiber is more obvious. The study analyzed the hooked fiber straightening process through numerical simulation, which guides the design of key components such as rotor-spinning fiber transport channels.

Key words: rotor spinning, fiber transport channel, hooked fiber, fiber straightness, numerical simulation

中图分类号:

TS103.2

张定眺, 王倩茹, 邱芳, 李凤艳. 改进转杯纺输纤通道气流场及其纤维伸直形态的模拟[J]. 纺织学报, 2025, 46(02): 100-105.

ZHANG Dingtiao, WANG Qianru, QIU Fang, LI Fengyan. Simulation of flow field and fiber straightening in reconstructed fiber transport channel in rotor spinning[J]. Journal of Textile Research, 2025, 46(02): 100-105.

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链接本文: http://www.fzxb.org.cn/CN/10.13475/j.fzxb.20240906601

http://www.fzxb.org.cn/CN/Y2025/V46/I02/100

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模拟参数	类型	数值
网格单元	四面体网格	84 677
输纤通道入口	速度入口	10 m/s
输纤通道出口	压力出口	-8 000 Pa
输纤通道壁面	无滑移边界	—
湍流模型	RNG k-ε	—

类别	密度/(kg·m^-3)	弹性模量/GPa	泊松比
纤维	1 540	7	0.4
输纤通道	7 850	210	0.3

弯钩纤维类别	模拟时间/s	伸直度/%
弯钩纤维类别	模拟时间/s	改进前	改进后
Ⅰ	0.008	83.15	87.65
	0.008 5	87.00	91.40
	0.009	91.20	97.50
Ⅱ	0.008	82.00	88.15
	0.008 5	83.25	93.35
	0.009	88.70	97.80
Ⅲ	0.008	83.00	98.40
	0.008 5	85.80	98.60
	0.009	88.60	98.10
Ⅳ	0.008	85.10	96.50
	0.008 5	86.85	97.25
	0.009	91.25	96.85

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