What technical features can improve the performance of the outer rotor axial fan?

2023-11-27 18:59:17

The external rotor axial flow fan is a fan widely used in industrial and civil fields, and its performance plays a vital role in improving the efficiency and energy saving of equipment. At present, with the development of science and technology and the deepening of theoretical research, the performance of the external rotor axial fan has also been significantly improved. This article will introduce the technical characteristics of the external rotor axial fan from several aspects and how to improve its performance.

Increased leading edge size and reduced loss coefficient. The size of the leading edge is one of the important parameters of the outer rotor axial flow fan, and its size directly affects the aerodynamic performance of the fan. Reducing the size of the leading edge can significantly reduce the loss coefficient of the fan and improve the efficiency of pressure and flow. At present, many studies have shown that the design method of using a wheel with a relatively small thickness of the front edge and increasing the angle of the front edge can not only maintain high pressure and high flow rate, but also greatly reduce the loss coefficient of the fan.

Second, a multi-stage impeller design is adopted. The multi-stage impeller is another key design element of the outer rotor axial fan. In the design of multi-stage impellers, multiple impellers are arranged in the same fan, and these impellers form a system, and the efficiency of the fan is improved through the airflow interaction between the impellers. Studies have shown that the multi-stage impeller design can increase the efficiency of fan pressure, reduce aerodynamic losses and reduce flight noise.

Third, 3D turbulence simulation and optimal design methods are adopted. 3D turbulence simulation can help designers understand the aerodynamic characteristics of the fan more accurately, optimize the aerodynamic shape of the blades, and improve the efficiency of the fan. With the development of computer software and the improvement of hardware capabilities, 3D turbulence simulation and optimization design methods have been widely used in the design process of external rotor axial fans.

Fourth, the design of sharp-edged blades is adopted. The sharp-angled blade is a blade with a large-sized cutout, which is designed to increase the flow of the fan while reducing the noise of the fan when it is rotating. The advantage is that under the premise of ensuring a large flow rate, the pressure loss of the fan is smaller, and the roar of the high-speed airflow can be reduced, and the noise reduction effect is good.