Why flow of centrifugal fans is not blocked at their discharge?

The flow of centrifugal fans is not blocked at their discharge because these fans are designed to create a high-velocity airflow that exits the fan outlet. The impeller's design and rotation generate a centrifugal force that accelerates the air outward, overcoming any potential blockage. Additionally, the discharge area is typically engineered to allow for smooth airflow and minimize turbulence, ensuring efficient air movement. This design prevents back pressure and maintains consistent airflow even at the discharge point.