Fan Damper Curved Flaps for Lower Pressure Drop

The patent applies curvature to the flap surfaces by introducing concave and convex portions instead of using flat surfaces. The concave portion faces the inlet and the convex portion faces the outlet, creating a curved profile that follows the airflow direction. This curvature reduces flow separation and turbulence, thereby decreasing pressure drop and improving fluid dynamic efficiency while maintaining manufacturing feasibility through standard forming processes.

The curved profile with concave and convex portions creates favorable pressure gradients that assist flap opening. The concave portion at the inlet captures incoming flow and directs it to push the flap open, while the convex portion at the outlet promotes smooth flow attachment. This curvature design enhances opening efficiency under various operating conditions without adding complex actuation mechanisms.

The concave and convex portions are designed with smooth continuous curves that can be manufactured using standard forming processes such as hydroforming, roll forming, or injection molding. The curvature profiles are optimized to balance aerodynamic performance with manufacturability, avoiding overly complex geometries while achieving significant pressure drop reduction through the curved surface interaction with airflow.