纺织学报 ›› 2021, Vol. 42 ›› Issue (07): 95-100.doi: 10.13475/j.fzxb.20201000406

• 纺织工程 • 上一篇    下一篇

新型熔喷气流模头的设计与数值分析

王玉栋1,2, 姬长春1(), 王新厚3, 高晓平4   

  1. 1.广西科技大学 生物与化学工程学院, 广西 柳州 545006
    2.新疆大学 机械工程学院, 新疆 乌鲁木齐 830046
    3.东华大学 纺织学院, 上海 201620
    4.内蒙古工业大学 轻工与纺织学院, 内蒙古 呼和浩特 010051
  • 收稿日期:2020-10-06 修回日期:2021-04-04 出版日期:2021-07-15 发布日期:2021-07-22
  • 通讯作者: 姬长春
  • 作者简介:王玉栋(1983—),男,讲师,博士。主要研究方向为非织造材料与工程。
  • 基金资助:
    国家自然科学基金项目(51776034);内蒙古自然科学基金项目(2021LHMS01003)

Design and numerical analysis of new types of melt blowing slot-dies

WANG Yudong1,2, JI Changchun1(), WANG Xinhou3, GAO Xiaoping4   

  1. 1. College of Biological and Chemical Engineering, Guangxi University of Science & Technology, Liuzhou, Guangxi 545006, China
    2. School of Mechanical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China
    3. College of Textiles, Donghua University, Shanghai 201620, China
    4. College of Textile and Light Industry, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China
  • Received:2020-10-06 Revised:2021-04-04 Published:2021-07-15 Online:2021-07-22
  • Contact: JI Changchun

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摘要：

为改善熔喷流场和降低纤维直径,在普通双槽形气流模头的基础上设计了新型模头,并对其进行数值研究。借助Gambit软件建立新型模头的几何模型,采用Fluent软件对其流场进行模拟,分析了纺丝线上的速度、温度、湍流强度分布规律及其对纤维牵伸细化的影响。结果表明:与普通的双槽形模头相比,带有内稳定器的新型双槽形熔喷模头可有效地减小回流区的面积,增大纺丝线上的速度极大值,降低纺丝线上的速度波动和温度衰减速率;带有空气压缩器的新型气流模头可提高纺丝线上的流场速度和温度,但对模头附近的逆向速度和湍流强度峰值几乎没有影响;综合对比,同时带有内稳定器和空气压缩器的新型熔喷气流模头性能最佳,更有利于细化纤维。

关键词: 熔喷, 气流模头, 二维流场, 数值模拟, 牵伸, 熔喷非织造

Abstract:

In order to improve the airflow field and reduce the fiber diameter, several new die-heads were designed on the basis of a common slot-die, and a numerical study was conducted on such die-heads.The structural models of the new slot-dies were constructed by Gambit and Fluent software was used to numerically calculate the two-dimensional flow fields from these new slot-dies. In addition, the air velocity, temperature, turbulence intensity distribution on the spinning line of these new die-heads and their influence on fiber drafting were analyzed. The research results show that compared with the common slot-die, the new die-head with internal flow stabilizers can effectively reduce the recirculation zone, increase the peak speed on the spinning line, and reduce the speed fluctuation and temperature decay rate on the spinning line.The new slot-die with an air compressor can increase the velocity and temperature of the flow field, but it has little effect on the reverse velocity and the peak of the turbulence intensity near the die-head.Comprehensive comparison indicates that the new slot-die with an internal stabilizer and an air compressor has the best performance and is more conducive to drawing fibers.

Key words: melt blowing, slot-die, two-dimensional flow field, numeral simulation, drafting, melt blown nonwoven

中图分类号: 

  • TS174.1

图1

普通双槽形气流模头的结构示意图"

图2

模头2结构示意图"

图3

模头3结构示意图"

图4

模头4结构示意图"

图5

模头1的计算域"

图6

纺丝线上的速度分布"

图7

模头附近的速度矢量图"

图8

纺丝线上的温度分布"

图9

纺丝线上的湍流强度分布"

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