Centrifugal Fan Blade Design

A method is presented for redesigning a centrifugal impeller and its inlet duct.

Centrifugal fan blade design.

Axial and propeller fans. The highest efficiency of all of the centrifugal fans. A very common type of centrifugal fan typically referred to as a centrifugal blower uses a squirrel cage type wheel with many forward curved blades. A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid.

It has ideal zero slope in h q. Given the high performance of the baseline impeller the redesign adopted a high. 5 found that the choice of a strongly aft loaded hub and mildly aft loaded shroud for the main blade. The redesign effort was geared towards meeting the design volute exit pressure while reducing the power required to operate the fan.

The double discharge volute casing is a structural constraint and is maintained for its shape. Namic design of a centrifugal impeller with the pressure ratio up to 6 2 zange neh et al. Radial bladed fans are best for industrial applications where there is dust or in environments where there is gas or moisture in the air. 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.

Such a fan is also called a blower fan biscuit blower citation needed or squirrel cage fan because it looks like a hamster wheel. Deep blades for efficient expansion with the blade passages. Suitable for higher static pressure up to 14 3 5 kpa. The axstream s centrifugal compressor fan profiler and blade design software module is used to create and edit 3d airfoils for full or partial channel length.

Radial these are high pressure fans with medium airflow. Centrifugal fan blade types. In an axial fan the air flows in parallel to the shaft. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink.

A wide range of geometric tools and interactive charts allows users to configure the centrifugal radial or compressor. The blades are shallow with a substantial curvature in the direction of rotation that results in a higher blade tip speed than a backward curved blade. The impeller design will depend on the aerodynamic duty and the operating conditions. Centrifugal fans come in four basic fan types each with its own specific purpose.

Centrifugal compressor fan profiler and blade design software. 9 to 16 blades of airfoil curved away from the direction of rotation. Axial propeller fans are more suited for applications with lower volumes and pressures. Centrifugal fan design methodologies studies on radial tipped centrifugal fan 111 under dust laden conditions.

The highest speed of the centrifugal fans.