291-褶型纤维过滤介质压力损失的多尺度模拟.pdfVIP

褶型纤维过滤介质压力损失的多尺度模拟 朱景晶， 钱付平∗ （安徽工业大学建筑工程学院 安徽 马鞍山 243032） 摘要：大气中的颗粒物污染现已引起政府和社会的高度重视。目前，褶型空气过滤介质 因其过滤面积大、过滤效率高等优势被广泛用作空气净化装置的滤芯。随着CFD 技术的发展， 越来越多的学者利用CFD 方法对过滤介质的过滤特性展开研究。但是，利用CFD 软件在进行 仿真研究时，空滤介质的相关参数通常无法准确获取。现在通用的解决方法是研究人员查阅 与研究对象相近材料的相关文献得到参数值。这一方法会增加计算误差。为了解决上述问题， 本文从微观和宏观两个角度对褶型纤维过滤介质的压力损失进行多尺度模拟分析，建立两个 尺度之间的数据传递关系，从而准确得到参数值。本文研究结果对于拓展纤维过滤介质的研 究方法及优化其结构具有重要理论及实际意义。 关键词：褶型纤维过滤介质；压力损失；多尺度模拟；CFD Abstract: Particulate matter pollution in the air has attracted the attention of the government and the society. At present, the pleated fibrous media has been widely used as filtration material in air purification devices because of its large filtration area and high filtration efficiency. With the development of CFD, a lot of scholars have applied CFD method and its related software to study the filtration characteristics of fibrous media. However, when using CFD software for numerical calculation, the relevant parameters of the fibrous media are usually empirically obtained. Nowadays, in response to this issue, the common solution is to obtain the parameter values of the relevant documents of similar to the research subjects referred by researchers. This method will increase the calculation error. In order to solve the above problems, this study builds the data relationship that transfers between the two scales through the multi-scale simulation of the pleated fibrous media, that is, the pressure loss of the pleated fibrous media from the micro and macro perspectives. Thus the parameter values are obtained accurately. The results of this study have important theoretical and practical significance for expanding the research methods and optimizing the structure of fiber filter media. 1 前言 [1] 国内外已有众多学者对褶型纤维过滤介质进行了相关研究。Chen 等 率先采用有限元 法对 U 型褶式过滤器进行了研究，分析了不同褶数对压力损失的影响，并得出存在最优褶 数的结论。Zhu[2]等基于电镜图像（SEM ）技术，利用响应曲面法（RSM ）