It has been shown that different centrifugal pump types have different dimensional swirling flows in the form of uniform wrapping layers even if the pressure of the basic mechanicals inside the centrifugal pump has been taken into consideration. This is mainly because that the dissipation of the kinetic energy of varied centrifugal pump types is revealed to be vastly different from one another, especially at the center of the swirl where pumping fluids marked by low energy accumulate altogether. What is more, in the cross section parts, the pressure gradient of centrifugal pump presents a logical order so as to push the pumping fluids in the boundary layers toward the center in a continuous manner.
On the other hand, in a radial centrifugal pump impeller, there is a marked difference between the size of the centrifugal pump inlet and outlet or to be clearer, in their diameters and widths, which is the determining factor of the centrifugal pump channel height at the exit position. What is more, in this kind of construction and design, the forces of the centrifugal pump will no doubt result in higher pressure and lower flow rate compared to conventional centrifugal pump, which will not lead to the change of the axial centrifugal pump impeller in terms of the radial direction as well as outlet width even though semi-axial impellers might be used during the ups and downs of the pumping pressure as required. To be more specific, the centrifugal pump impeller has a number of blades and the specific number is mainly depending on the desired performance and noise constraints that are expected by the pump users or owners. At the same time, centrifugal pump open impellers are very useful in a lot of centrifugal pump types since it makes the cleaning and maintenance of the pump easier and reduces the risk of blocking, which is especially true when used in sewage application.
Apart from these two factors, the amount and size of solid particles in the centrifugal pump fluids also play a role in determining the performance of the pump. As a matter of fact, it has been proved that centrifugal pump impellers with more than five channels are marked by the highest efficiency and can be used smoothly for centrifugal pump fluids even though solid particles may exist in practice. And they are designed to minimize the possibility of particle blocking that may occur with fewer channel centrifugal pump impellers since it can handle a certain amount of particles passing through the pump in an easy way. On the other hand, centrifugal pump with less than three channels have been phased out in a gradual manner since this kind of pump may lead to energy waste and add to the production cost as a whole.