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Centrifugal Fan Blades

The document discusses two types of fans - backward curve fans which have nearly as high efficiencies as airfoil fans and allow high tip-speed operation, and radial tipped fans which have wheels that are backward curved but with blades curved inward and radial at the tips, offering medium efficiencies and used for high-volume, high-pressure, erosion resistant applications.

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Vijay Bhan
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462 views1 page

Centrifugal Fan Blades

The document discusses two types of fans - backward curve fans which have nearly as high efficiencies as airfoil fans and allow high tip-speed operation, and radial tipped fans which have wheels that are backward curved but with blades curved inward and radial at the tips, offering medium efficiencies and used for high-volume, high-pressure, erosion resistant applications.

Uploaded by

Vijay Bhan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Backward Curve

These fans have efficiencies nearly as high as the airfoil design. An advantage is
that their single-thickness, curved plate blades prevent the possibility of dust
particle buildup inside the blade, as may occur with perforated airfoil blades. The
robust design allows high tip-speed operation, and therefore this fan is often used
in high-pressure applications.

Radial Tipped
These fans have wheels that are backward curved, but in a way slightly different from
backward curved fans. Backward curved fans' have wheels whose blades curve outward,
while radial-tip fans' blades are curved inward and radial at their tips (hence the name
"radial tip"), while still in a backwardly-curved configuration. Their curvature can also be
thought of as radial at the tips but gradually sloping toward the direction of rotation. This
rugged design is used in high-volume flow rate applications when the pressure
requirement is rather high and erosion resistance is necessary. It offers medium
efficiencies. A common application is the dirty side of a baghouse or precipitator. The
design is more compact than airfoil, backward curved or backward inclined fans.

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