In a tangential fan, the air is drawn in over the entire length of the fan impeller. Inside the impeller, the airflow is diverted and accelerated by the vortex created by the rotation of the impeller. The airstream then exits over the entire length of the impeller on the discharge side. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, or squirrel-cage fan (because it looks like a hamster wheel). Tiny ones used in computers are sometimes called biscuit blowers.
Tangential (also known as Crossflow) fans are used to provide an elegant and efficient solution for many applications wherever air is required uniformly to heat, cool or ventilate. The tangential/tubular fans work in the following manner. As the electric motor is turned on, the hub rotates in response to the rotary motion of the driving shaft. The rotary motion of the hub causes the forward motion of the curved elongated blades.
Blower is equipment or a device which increases the velocity of air or gas when it is passed through equipped impellers. They are mainly used for flow of air/gas required for exhausting, aspirating, cooling, ventilating, conveying etc. Blower is also commonly known as Centrifugal Fans in industry. A Tangential fan has longer length when compared to its diameter. They are also known as Cross-Flow fans because the air comes out of the entire length of the impeller. A Cross-Flow fan uses impeller with forward curved blades.
