The dynamic filtration efficiency of the particle-loaded fibrous media

Abstract:

The nonlinear differential equation for aerosol concentration of the particle-loaded porous fibrous media was established based on the transport equation, N-S equation in the applications for Newton viscous fluid. The general governing equation for aerosol concentration with the packing density of the particle-loaded porous fibrous media was calculated by the mass deposition of dust or aerosol particle. In addition, laboratory experiment was carried out to study the close correlation among the classic dimensionless parameters and their influence on the filtration efficiency of particle-loaded fibers. The empirical formulas about the dynamic filtration efficiency were developed through nonlinear regression. The results of experiment showed that the air flow lied in the Stokes region and in the laminar flow as Reynolds number is less than 1. The calculated interception parameter R was around 0.086~0.559. However, the fitted empirical formulas about the dynamic filtration efficiency in this paper were only applied to the case where Stokes number is less than 1.

Key words:Differential Equation for Aerosol Concentration，Dynamic Filtration, Dusty Packing Density, Empirical Formula