Which type of fan generates airflow that is perpendicular to its axis?

The type of fan that generates airflow perpendicular to its axis is the centrifugal fan. This design utilizes a rotating impeller to draw air into the fan and then expels it at a right angle, or perpendicular, to the intake direction. This airflow pattern is ideal for applications requiring high pressure and the ability to move air over longer distances, making centrifugal fans commonly used in HVAC systems, industrial processes, and ventilation applications.

Understanding the centrifugal fan's mechanics is crucial, as it allows for the control and optimization of airflow for various engineering and architectural needs, distinguishing it from other fan types. For instance, axial fans move air parallel to their rotating axis, and mixed flow fans exhibit characteristics of both axial and centrifugal fans, while vortex fans are designed for specialized applications involving spiral airflow.