Understanding the Difference Between Axial Flow Impellers and Radial Flow Impellers
Industrial impellers, also know as agitator blades, can be split into two main categories based on the type of fluid motion they generate during operation. The two categories are axial flow and radial flow.
Axial Flow Motion
Radial Flow Motion
Different Designs of Axial Flow Impellers
2. Propeller blades: These types of blades also generate axial fluid flow. However, they generate less shear stress compared to pitched blades. Propellers are generally used for mixing applications due to their efficiency. They are also more commonly found in portable mixers.
3. Hydrofoils: These axial flow impellers generate the least amount of shear stress in fluids. Their design is great for producing high flow. They can be used for general blending applications but they are also used as an alternative for large scale mixing applications because large propeller blades are expensive.
Different Designs of Radial Flow Impellers
Because of their sideways fluid motion, radial flow impellers produce a high degree of shear stress. The fluid flow level produced is low. These impellers are therefore primarily used for dispersion applications.
2. Dispersion blades: These are speciality blades that almost
solely generate a very high degree of shear stress in fluids
due to their mostly flat/disc-like designs, which facilitate
radial flow. The teeth at the end of the discs can rapidly breakdown
agglomerations. As the name suggests, they are highly efficient
at the task of dispersion and are being increasingly used for