化工进展 ›› 2022, Vol. 41 ›› Issue (1): 30-39.DOI: 10.16085/j.issn.1000-6613.2021-0123

• 化工过程与装备 • 上一篇    下一篇

异形纤维阵列过滤特性的数值模拟

王戈1(), 孙志伟2, 谭蔚1, 邱威1, 朱国瑞1()   

  1. 1.天津大学化工学院,天津 300350
    2.湖南中烟工业有限责任公司,湖南 长沙 410007
  • 收稿日期:2021-01-18 修回日期:2021-05-22 出版日期:2022-01-05 发布日期:2022-01-24
  • 通讯作者: 朱国瑞
  • 作者简介:王戈(1995—),男,硕士研究生,研究方向为流体力学。E-mail:wangge123@tju.edu.cn
  • 基金资助:
    烟草行业卷烟功能材料重点实验室(湖南中烟工业有限责任公司)开放基金

Numerical simulation of filtration characteristics on profiled fiber array

WANG Ge1(), SUN Zhiwei2, TAN Wei1, QIU Wei1, ZHU Guorui1()   

  1. 1.School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
    2.China Tobacco Hunan Industrial Company Limited, Changsha 410007, Hunan, China
  • Received:2021-01-18 Revised:2021-05-22 Online:2022-01-05 Published:2022-01-24
  • Contact: ZHU Guorui

摘要:

为研究异形纤维排布方式对其过滤性能的影响,以矩形及交错排布为基础,在保持纤维体积分数不变的条件下,通过改变纤维的列间距调整阵列结构,运用CFD-DEM耦合方法对含尘空气通过具有不同异形纤维阵列结构的简化过滤器模型过程进行数值模拟。结果表明:当纤维的体积分数保持不变,交错纤维阵列较矩形阵列过滤效率高出35%,且对于颗粒的吸附力更强;而在交错阵列的基础上,调整列间距得到的前密阵列和后密阵列均可保持80%左右的过滤效率,且不影响颗粒吸附力的大小,但前密阵列产生的压降更低,即具有更高的品质因数;在整个过滤过程中,纤维-颗粒间的黏附作用远远高于颗粒与颗粒间的相互作用,说明颗粒过滤主要来源于纤维-颗粒作用的贡献。

关键词: 异形纤维, 过滤, 纤维阵列, 计算流体力学-离散单元法, 排布方式

Abstract:

In order to study the influence of the arrangement of special-shaped fibers on its filtration performance, based on the rectangular and staggered arrangement, and keeping the volume fraction of fibers unchanged, the array structure was adjusted by changing the column spacing of fibers. CFD-DEM coupling method was used to simulate the process of dusty air passing through a simplified filter model with different special-shaped fiber array structures. The results showed that when the volume fraction of fiber remained unchanged, the filtration efficiency of staggered fiber array was 35% higher than that of rectangular array, and the adsorption capacity for particles was stronger. On the basis of staggered array, the filtration of the pre-dense array and post-dense array can be maintained at about 80% by adjusting the column spacing, and the particle adsorption capacity was not affected, but the pressure drop generated by the pre-dense array was lower, that is, it has a higher quality factor. In the whole filtration process, the adhesion between fibers and particles was much higher than the interaction between particles, which indicated that particle filtration mainly came from the contribution of fiber particle interaction.

Key words: profiled fiber, filtration, fiber array, CFD-DEM, layout

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