Industrial Axial Fan Blades or Propellers : Cincinnati Fan (2024)

FAQs

What is the difference between propeller fan and axial fan? ›

Axial fans are basically propeller fans with shorter rigid blades assembled in a tubular housing to provide some degree of controlling and/or streamlining the gas flow. Axial fans can be subdivided into two types, namely, vane axial and tube axial.

Most ceiling fans deigned for the home come with 4 to 5 blades for the ideal balance between the amount of air circulated and the amount of ambient noise. Whether you are looking for a new ceiling fan or wanting to replace an old fan, Martec has the right fan for you.

The calculation and design of an axial fan for a blower or aeraulic ventilation system, is to dimension the diameter of the fan, the number of blades, the speed of rotation, the hub diameter and the twisting of the blades as a function of delta total pressure of the fan to be provided to compensate for pressure losses ...

Axial fans generally comprise fewer blades (two to six) than centrifugal fans. Axial fans commonly have larger radius and lower speed (ω) than ducted fans (esp. at similar power.

Fan blades and propellers are used to convey power from a source (such as a jet engine) for propulsion or the movement of air. Propellers are an array of fan blades that transmit power by converting rotational motion into thrust. They are sometimes referred to as props.

The impeller power rises rather sharply if the volume flow is drastically restricted, and the motor could be over-heated, particularly if on the downstream side, where centrifugal flow starves it of cooling air. However, propeller fans are not often used in systems where such excessive resistance could arise.

The efficiency of a centrifugal fan can depend on the type of fan blade it has. In this case, the airfoil is the best and most efficient. Aerofoil designs give maximum efficiency (up to 10% greater than rearward curved blades) among centrifugal fan designs.

Choosing a fan with four or five blades used to be the best way to ensure quiet operation, as more blades tend to create natural balance within the fan.

Fan Blade Pitch: Maximizing Air Movement

A steeper pitch means the blades can push more air, leading to better airflow. For example, a fan with a blade pitch of 15 degrees will generally move more air than one with a 10-degree pitch.

The airfoil fan blade in a centrifugal fan has outstanding aerodynamic properties and design efficiency of up to 89%. It can be employed in medium to high-pressure industrial applications that require clean air or low dust concentrations. Four distinct series for various wheel types provide selection versatility.

What are the three types of axial fans? ›

There are three basic types of axial fans: propeller, tubeaxial, and vaneaxial.

The air delivering capacity of axial flow fans ranges from 100 to 500000 cubic feet per minute (3 to 14000 cubic meters per minute). Impellers usually have blades with cross sections matching those of an aerofoil.

Five-blade fans can often push more air than a three-blade fan due to the fact that they have a larger total surface area of blades. The larger the surface area of the blades, the more sweeping area the fan has. However, if a three-blade fan had larger blades than a five-blade fan, it would be able to move more air.

Ceiling fan with more blades can increase the drag on the motor and affects its movement. It's because of this why industrial fans have two or three blades only. They can move more air and go faster, and noise is not much of a problem. Ceiling fans for home use usually have four or five blades.

Common Applications for Axial Fans

They can cool electronic equipment or computer rooms. They can be used in HVAC operations, in ac condensers, heat exchange units, or for spot cooling in industrial systems. Axial fans can also operate as exhaust fans.

This type of fan is generally used for air circulation in large rooms, ventilation of rooms through walls and ducting. Compared to centrifugal fans, propeller fans take up less space, are less expensive and are quieter.

Centrifugal fans can produce a high-pressure airflow, based on how the fan blades are angled. Adversely, the blades of an axial fan are in line with the axis, which provides a larger, low-pressure airflow. Furthermore, axial fans tend to be lighter than centrifugal fans, due to the low-pressure output.

Disadvantages: Because the exhaust air volume is small, the ventilation time is long; the actual effect of rainfall is not significant, and high-moisture grains are not suitable for ventilation with axial flow fans.