In this study

a flow structural model in a rectangular channel with an axial flow fan is established and analyzed through numerical simulation and experiments to get the influence of two design parameters

i.e.

axial length of the deflector and tip clearance

on the performance of axial flow fan. The mapping relationship between the design parameters and internal and outlet flow characteristics of the rectangular channel with an axial flow fan is also presented based on the simulation model. The experimental data revealed that the outlet static pressure

volume flow rate

and efficiency of the fan were inversely proportional to the clearance factor and directly proportional to the length factor. The comparison between the simulation results and experimental data validated the simulation model. Based on the mapping relationship

the optimal clearance factor and length factor of the fan design parameter factor were 0.8% and 12.5%

respectively

which could guide the design and optimization of a refrigerator duct structure.