纺织学报 ›› 2022, Vol. 43 ›› Issue (09): 76-81.doi: 10.13475/j.fzxb.20210705406

• 纤维材料 • 上一篇    下一篇

基于随机算法的纤维材料过滤特性仿真分析

诸文旎1, 徐润楠1, 胡蝶飞1, 姚菊明2,3,4, MILITKY Jiri5, KREMENAKOVA Dana5, 祝国成1,3()   

  1. 1.浙江理工大学 纺织科学与工程学院(国际丝绸学院), 浙江 杭州 310018
    2.浙江理工大学 材料科学与工程学院, 浙江 杭州 310018
    3.浙江理工大学 浙江-捷克先进纤维材料联合实验室, 浙江 杭州 310018
    4.宁波大学 材料科学与化学工程学院, 浙江 宁波 315201
    5.利贝雷茨理工大学纺织工程学院, 捷克 利贝雷茨 46117
  • 收稿日期:2021-07-16 修回日期:2022-03-09 出版日期:2022-09-15 发布日期:2022-09-26
  • 通讯作者: 祝国成
  • 作者简介:诸文旎(1997—),女,硕士生。主要研究方向为空气过滤材料。
  • 基金资助:
    国家自然科学基金项目(51803182)

Simulation analysis of filtration characteristics of fiber materials based on random algorithm

ZHU Wenni1, XU Runnan1, HU Diefei1, YAO Juming2,3,4, MILITKY Jiri5, KREMENAKOVA Dana5, ZHU Guocheng1,3()   

  1. 1. College of Textiles Science and Engineering(International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. School of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    3. Zhejiang-Czech Joint Laboratory of Advanced Fiber Materials, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    4. School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315201, China
    5. Faculty of Textile Engineering, Technical University of Liberec, Liberec 46117, The Czech Republic
  • Received:2021-07-16 Revised:2022-03-09 Published:2022-09-15 Online:2022-09-26
  • Contact: ZHU Guocheng

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摘要：

为分析纤维空气过滤材料的流场演变情况,综合过滤效率及颗粒流动轨迹,基于随机算法建立了纤维空气过滤材料的三维模型,并采用计算流体力学中的欧拉-拉格朗日离散相模型,在雷诺相似准则的基础上研究了微米纤维介质中的气固流动特性。结果表明:入口速度变化对流场压力与速度场分布有明显影响,随着入口速度增大,阻滞区域面积增加,流场空隙处更易形成高速流动与速度漩涡,同时流场整体速度差增大,压力损失与入口速度呈正相关;纤维模型对平均粒径为8~18 mm颗粒的过滤效率较为稳定,均在80.4%~84%,在入口速度为2 m/s工况下,过滤效率与粒径接近正比例关系。

关键词: 空气过滤, 数值模拟, 相似准则, 过滤特性, 离散相模型, 纤维材料

Abstract:

In order to understand flow field evolution of fiber-based air filter, a three-dimensional model, integrated filtration efficiency and particle flow path, was established based on the random algorithm fiber air filter material. The computational hydro dynamics following the Euler-Lagrange discrete phase model was studied in gas-solid flow characteristics based on the Reynolds similarity criterion in micron fiber medium. The results show that the change in inlet velocity has a significant effect on the flow field pressure and velocity field distribution. With the increase in inlet velocity, the blocked area increases, and high-speed flow and velocity vortices are more likely to be formed in the flow field voids, and the overall velocity difference increases at the same time. The pressure loss is positively correlated with the inlet velocity. The filtration efficiency of the fiber model is relatively stable for particles with average particle size of 8-18 mm, which is 80.4%-84%, and the relationship between filtration efficiency and particle size is close to direct proportion when the inlet velocity is 2 m/s.

Key words: air filter, numerical simulation, similarity criterion, filtration characteristic, discrete phase model, fiber material

中图分类号: 

  • TS151

图1

纤维集合体模型"

图2

网格划分"

图3

边界条件"

图4

不同入口速度下的流场速度分布"

图5

不同入口速度下的流场压力分布"

图6

纤维集合体压降"

图7

纤维集合体对不同粒径颗粒物的过滤效率"

图8

颗粒轨迹追踪图"

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