Axial Flow Fan Blade Design

The most common type for wet cooling towers is 28 ft diameter and has eight blades.

Axial flow fan blade design.

The most common type of fan for air cooled heat exchanger ache is less than 14 ft. Factors which determine the performance of the fan include the number and shape of the blades. The fan is designed to produce a pressure difference and hence force to cause a flow through the fan. First you create a new project choosing the ventilator design module.

This leads to high power consumption and high noise levels with lesser efficiency. Diameter and has four blades. The last requirements is often ignored. 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.

Insert the design point of the fan. 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. 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.

A typical ache fan is shown in fig. 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. Ideal flow 1 3 frames of references 1 4 co ordinate system and components of velocity 1 5 velocity triangles on be turbine. Axial fans can have widely varied operating characteristics depending on blade width and shape number of blades and tip speed.

The flow is axial at entry and exit. 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. 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. Design parameters include power flow rate press.

The grey area is the inconsistency in proper aerofoil selection and dimensional stability of the metallic impellers. The axial flow fans are conventionally designed with impellers made of aluminium or mild steel. In this video we ll be demonstrating the aerodynamic design of an axial low pressure fan including a cfd simulation. The design point is defined by volume flow rate total pressure rise and rotational speed.