Cooling fan structure design principle(2)

2, the Fan is a kind of mechanical energy into gas potential energy and kinetic energy of a power equipment, according to the direction of the airflow, it can be divided into the following three categories:

Axial flow: The direction of the air flow is parallel to the axis, and the fluid enters the fan blade along the central axis of the fan blade and flows out along the central axis of the fan blade.

Radial flow type (centrifugal type) : The air flow is perpendicular to the axis along the radial direction of the impeller, and the fluid enters the fan blade along the central axis of the fan blade and flows out radially along the fan blade.

Mixed flow (oblique flow) : the flow direction has both axial and radial components, and the fluid enters the fan along the central axis of the fan and flows out along the axial and radial direction of the fan.