| A cabin air filter test duct is used to test the efficiency and pressure drop of the cabin air filter in an automobile. It is desired to have a uniform air flow at the test section of the duct in order to improve its performance. In this study, computational fluid dynamics (CFD) was used to simulate the turbulent flow in a cabin air filtration test duct. The simulation process involves modeling of the geometry, grid generation, setting up of boundary conditions, and selecting relevant flow parameters. The velocity distribution in the test section obtained from numerical solution was partially validated against experimental results. A parametric study was carried out to identify the optimal design in terms of uniformity of the velocity distribution in the test section. Two designs, both using a perforated plate upstream of the test section were identified to satisfy the prescribed velocity uniformity requirement. |
