Blade solidity (original) (raw)

Blade solidity is an important design parameter for the axial flow impeller and is defined as the ratio of blade chord length to spacing. * Blade Solidity = c/s Where * is the spacing * is the mean radius * is blade number * Chord length c is the length of the chord line In case of an axial flow impeller mean radius is defined in terms of hub and tip radius as : * Blade solidity should not be confused with rotor solidity, which is the ratio of the total area of the rotor blades to the swept area of the rotor.