No abstract

Airfoil is the key factor affecting the pneumatic performance of axial flow fan. the higher pneumatic performance of the designed axial flow fan, the more efficiency of axial flow fan, and less power consumption. Fisrt, the Profili software is used to optimize the design of NACA4412 airfoil to improve the lift-drag ratio, and obtains a new high-performance airfoil NACA4412-MOD suitable for heat dissipation axial flow fan. Then the pneumatic performance of the new and old airfoils is calculated by numerical simulation software. The results show that under the given Reynolds number, the lift coefficient of the new airfoil is larger than that of the original airfoil, the resistance is maintained at a considerable level or slightly, the lift-drag ratio increases greatly, and the range of the attack angle for high lift-drag ratio is wider.

Based on the CFD simulation of the axial flow fan for air conditioning, a flexible and fast deformation model of axial flow fan is established in this paper. The influence of different fan design parameters on the performance of axial flow fan under different working conditions, such as different speed, air volume and pressure, is studied. A set of intelligent optimization platform for axial flow fan is formed and the performance of a certain type of fan is optimized under the working condition of 22000m3/h flow rate.