Centrifugal Fan Inlet Design

The impeller design will depend on the aerodynamic duty and the operating conditions.

Centrifugal fan inlet design.

Reference line is the top vertical axis through center of fan shaft. Such a fan is also called a blower fan biscuit blower citation needed or squirrel cage fan because it looks like a hamster wheel. Fan installations with system effects should be avoided if possible. During this process stage velocity pressure and discharge at different stages are calculated.

Radial forward curved and backward curved see figure 5 3. A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Position of inlet box and air entry to inlet box in determined from drive side of fan. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink.

The effects of the blade inlet. Because of their simple design radial fans are well suited for high. When the impeller rotates air is allowed to enter the fan around the open space between the impeller and the shaft and is forced to proceed at a right angle to the. However in many cases space constraints or other factors prohibit designers to allow for ideal conditions.

ρᵢ is the density of the air at the inlet edge of the fan blades. Centrifugal fan design methodologies studies on radial tipped centrifugal fan 112 after inlet duct. Rₐ is the specific or mass gas. Position on inlet box is designated in degrees clockwise from top vertical axis as shown.

Types the major types of centrifugal fan are. Single inlet single width sisw or double inlet double width didw shaft power up to 200 kw. In centrifugal fans the air flows at right angles to the inlet air direction and throws the air outward toward the outlet through the action of deflection and centrifugal force.

Fan types typically affected by both inlet and outlet conditions are inline fans both axial and centrifugal and housed single inlet centrifugal fans. W is the width of the blades in a centrifugal fan parallel to the axis of rotation of the impeller. A modern optimum design method for a centrifugal fan has been presented using a computational fluid dynamics cfd technique to replace the conventional method. Pᵢ is the pressure of the air at the inlet edge of the fan blades.

Inlet box positionsfor centrifugal fans amca standard 99 2405 83 notes. Fan parts impeller design the centrifugal fans impeller have five basic blade shapes and a number of impeller configurations i e dwdi double width double inlet or swsi single width single inlet.