Numerical simulation of filtration performance of recycle cabin in airliner

The high efficiency air filter in recycle cabin of airliner can remove the particle pollutant. The complex geometry of recycle cabin, laminar effect of porous medium and unsteady clogging process of particulate matters make the air flow distribution in recycle cabin very complicate. Develops a Lagrange numerical simulation method to investigate the flow field and particle filtration process in the recycle cabin. Compares the simulation results using the numerical model with the available experimental data in literature, which shows that the error of the numerical model is acceptable. The results show that the air velocity near the inlet location is larger, but the filtration velocity along the filter surface is well-distributed, and the pressure drop of the recycle cabin is mainly caused by the filter medium. The particle layer is also well-distributed on the filter surface, and the transient pressure drop versus deposited mass curve is liner. If the total filtration surface area is constant value, the parameter variation of pleat structure and filter geometry has no obvious influence on the total pressure drop particle filtration percentage. Therefore, suggests designing the larger filtration surface and more compact air filter.