Number and shape of blades:

The number and shape of the blades affects the airflow handling capacity and efficiency of the fan. Typically, the greater the number of blades, the greater the airflow handling capacity of the fan, but it also increases drag. How the blades are shaped in terms of bending, twisting and profiling also affects the performance of the fan.

Blade angle and torque:

The angle and torque of the blades determine the forces on the blades and the direction of the airflow forces. Optimizing blade angle and torque can improve the efficiency and performance of a centrifugal fan.

Blade end design:

Blade end design can affect airflow loopholes and vortex losses. Properly designed blade ends can reduce these losses and improve fan efficiency.

Blade Material:

Blades are usually made of metal or composite materials. Choosing the right material ensures the strength, durability and light weight of the blades, thus improving the performance of the turbine.

Blade tip speed ratio:

The blade tip speed ratio is the ratio of the circumferential velocity at the tip of the blade to the circumferential velocity at the center. Reasonable blade tip speed ratio design can reduce the leakage of airflow and improve the efficiency of the fan.

Blade surface treatment:

The smoothness and coating of the blade surface can affect the flow of airflow and the resistance of the blade. Optimizing the blade surface treatment can reduce the friction loss and improve the efficiency of the fan.

Comprehensive consideration of the above factors, combined with numerical simulation and experimental verification, can design a centrifugal fan blade with superior performance. The design process also needs to take into account the fan's operating conditions, airflow characteristics and noise requirements to ensure that the designed blades can meet the actual needs.