To solve the problem of excessive noise from Commercial Fan, you can start from the following aspects:
1. Change the tip vortex noise reduction: By installing "winglets" and "flaps" on the blade tips to suppress the generation of turbulence and vortices, the tip vortex noise can be reduced.
2. Damping, shock absorption and noise reduction: For Commercial Fan blades, some or all free damping can be performed inside the casing from the rear end to the tip of the blade that vibrates more severely.
3. Wind noise control: By limiting the linear speed of the blade tip, the aerodynamic noise of the blade is reduced in proportion to the fifth power of the linear speed of the blade tip. At the same time, the chord length design of the blade shape is changed, and the chord length of the blade root section and the blade tip chord length are appropriately reduced to ensure that the power does not decrease and the area from the middle to the middle rear of the blade is appropriately enlarged, thereby reducing noise.
To sum up, in order to solve the problem of excessive noise of Commercial Fan, various methods can be used to reduce the noise and improve the use experience of Commercial Fan by changing the blade tip vortex, damping and noise reduction, and wind noise control.
