Axial Flow Fan Blade Design

It is important to select a fan on or near the point of peak efficiency to minimise the power consumption and noise emitted from the fan.

Axial flow fan blade design.

The grey area is the inconsistency in proper aerofoil selection and dimensional stability of the metallic impellers. The flow is axial at entry and exit. Design parameters include power flow rate press. First you create a new project choosing the ventilator design module.

This article discusses when an axial fan would be an appropriate selection. Carolus universität siegen institut für fluid und thermodynamik n09 085 a2 universität siegen institut für fluid und thermodynamik 1 1 axial cascade blade element be 1 2 actual vs. The design of an axial flow fan is described by the casing length the fan diameter inside dimension casing thickness motor terminal box design and the accessories. The axial flow fans are conventionally designed with impellers made of aluminium or mild steel.

The most common type of fan for air cooled heat exchanger ache is less than 14 ft. All our axial flow fans can be supplied as a standard with 2 to 10 mm casing gadge and a diameter from 250 mm to 2800 mm. The design solution is therefore to have the minimum number of blades cost at the highest possible speed efficiency with the largest manufacturable chord manufacturing far from stall stability at the minimum possible noise. This leads to high power consumption and high noise levels with lesser efficiency.

Fans have many applications including in wind tunnels and cooling towers. An axial fan is a type of fan that causes gas to flow through it in an axial direction parallel to the shaft about which the blades rotate. Diameter and has four blades. Axial fans can have widely varied operating characteristics depending on blade width and shape number of blades and tip speed.

A typical ache fan is shown in fig. Insert the design point of the fan. The design point is defined by volume flow rate total pressure rise and rotational speed. The methodology incorporates a control vortex design approach that results in a spanwise chord and twist distribution of the blades that maximize the volumetric flow rate contribution of the outer radii i e.

The most common type for wet cooling towers is 28 ft diameter and has eight blades. The axial flow velocity increases from the fan hub to the tip. Ideal flow 1 3 frames of references 1 4 co ordinate system and components of velocity 1 5 velocity triangles on be turbine. The last requirements is often ignored.