Fan blade, axial flow fan and railway train
By combining the leading-edge wave structure and trailing-edge protrusion with biomimetic design of the fan blades, the airflow separation and shedding are optimized, solving the problem of high noise in axial flow fans of rail vehicles, and achieving effective noise reduction and improved operational stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CRRC QINGDAO SIFANG CO LTD
- Filing Date
- 2026-04-21
- Publication Date
- 2026-07-17
AI Technical Summary
The existing axial flow fans of rail vehicles have high noise levels, especially in high wind pressure scenarios where aerodynamic noise becomes the main source of noise, and existing optimization designs are difficult to effectively reduce it.
The wind turbine blades are designed using biomimetic principles, with a wave structure at the leading edge and a protrusion at the trailing edge. The wavelength at the leading edge gradually increases, and the protrusion at the trailing edge extends along the chord direction. Combined with an asymmetric hyperboloid airfoil and a flange structure, the airflow separation and shedding process are optimized.
While maintaining the same air volume and pressure rise performance, aerodynamic noise was significantly reduced, and the stability and quietness of the fan operation were improved.
Smart Images
Figure CN122407601A_ABST