A CFD pressure drop model for microfibrous entrapped catalyst filters using micro-scale imaging

作者：Gu Qiang; Henderson Robert T; Tatarchuk Bruce J^*

来源：Engineering Applications of Computational Fluid Mechanics, 2015, 9(1): 567-576.

DOI：10.1080/19942060.2015.1094415

• pressure drop
• computational fluid dynamics (CFD)
• scanning electron microscope (SEM)
• microfibrous entrapped catalysts (MFEC)

A micro-scale pressure drop model for microfibrous entrapped catalysts (MFEC) is constructed based on experimental scanning electron microscope (SEM) images using computational fluid dynamics (CFD). This model investigates the separate contributions of fibers, entrapped particles, particle shape factors and the compressibility of MFEC to the total pressure drop in a high air velocity condition. A theoretical calculation is conducted to determine the flow type within the MFEC. Top view and side view SEM images of MFEC are taken to reproduce their 3D geometric structure, which significantly improves the accuracy of the model compared with other simplified models. Volume loading of fibers and entrapped particles, as well as media compressibility, are found to be major contributors to pressure drop. In an effort to reduce pressure drop, two types of leading-edge/trailing-edge filter fairings are also studied. Triangle fairings added to the leading edge and trailing edge of MFEC decrease pressure drop, especially at higher face velocities.

• 出版日期2015