Effect of Pleat Shape on the Pressure Drop of Clean Pleated Filter Panels

摘要

A numerical model has been developed to model the flow field and pressure drop of the pleat filter panel. In this model, the fluid flow in free flow channel is modeled by steady laminar flow and by modified Navier-Stokes equation using Darcy-Brinkman equation in filter media. A finite element method is used to solve the model numerically. It is shown that under certain pleat shape, the pressure drop can be minimized at an optimal pleat count, above which the pressure drop is dominated by viscous drag in pleat spacing, while below which, by resistance in filter media. Curved pleat shape will reduce the pressure drop in media-dominated regime while increase pressure drop in viscosity-dominated regime.