Arbitrary vortex

Arbitrary vortexIntermediate between the two above.

Most axial fans are of an arbitrary vortex design to a greater or lesser extent. Blades have to be cut away near to their roots so that they do not interfere with each other. A truly forced vortex design would require minimum tip gaps between blades and the casing. Weight would also increase towards the periphery leading to greater centrifugal stresses.

Posted in Fans Ventilation A Practical Guide

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