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Centrifugal Fans & Blowers
In case of Centrifugal Fans (& Blowers) air enters the impeller parallel to the axis of rotation. Air then turns in radial direction at the blade inlet of Centrifugal Fan. Air is guided by the rotating blade in radialy outward direction. The momentum provided to the air causes increase in kinetic and potential energy of air thereby generating air flow and static pressure.
Air at outlet of Centrifugal fan impeller is at high velocity. The high velocity air discharg is guided by the volute casing. Centriufgal fan volute casing reduces the air velocity converting velocity head to static head. If the high velocity of air comming out of the impeller is not reduced sufficeintly and propely guided it will lead to higher losses.
There are three types of Centrifugal Fans
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