Effect of Gurney Flap on Performance and Aeroacoustics of Variable-Pitch Axial Fans

For a variable-pitch axial fan with guide vanes, the effect of three series of Gurney flaps (GFs) configured at the trailing edge of blades on the performance and dynamics is numerically investigated; and the aerodynamic noise is predicted. Simulated results show that GFs increase the total pressure rise of the fan; the higher the GF height, the more notable the lifting capacity. The working point of the highest efficiency moves toward the large...