China 
Africa 
Explore chapters and articles related to this topic
Centrifugal and Mixed-Flow Pumps
Published in Getu Hailu, Michal Varchola, Peter Hlbocan, Design of Hydrodynamic Machines, 2022
Getu Hailu, Michal Varchola, Peter Hlbocan
A pump is a machine that imparts energy to a fluid. A centrifugal pump imparts energy to a fluid through rotation of an impeller. The centrifugal pump increases the pressure of the fluid, transports the fluid, and lifts it from a lower to a higher elevation by a centrifugal action. The rotational motion of the impeller increases the momentum of the liquid that enters axially and leaves the pump radially. The impeller is the rotating part while the diffuser is stationary. The accelerating fluid in the blade passages is finally pushed out of the impeller radially. In this way, both static pressure and velocity are increased. The three important parts of a centrifugal pump are: (1) the impeller (shown in Figure 3.1); (2) the diffuser; and (3) volute casing. The stationary volute casing converts the kinetic energy of the fluid, into pressure energy. This happens as the fluid passes through the stationary blade passages which have an increasing cross-sectional area. Finally, the fluid moves from the diffuser blades into the volute casing. The volute casing collects the fluid and transports it to the pump outlet. The volute casing also has a gradually increasing cross-sectional area towards the outlet of the pump for better conversion to pressure energy.
Performance prediction of a centrifugal pump delivering non-Newtonian slurry
Published in Particulate Science and Technology, 2018
K. R. Mrinal, Md. Hamid Siddique, Abdus Samad
The transport of multiphase flow, particularly the slurry, which is a mixture of liquid and solid, is widely encountered in the petroleum, mining, and chemical industries (Polansky 2014). Centrifugal (CF) pumps are used for transporting slurries in the industry. The main parts of a CF pump are rotating element (impeller) with blades and a stationary element (volute casing). The impeller-rotation reduces the pressure at the pump-inlet resulting in fluid flow into the pump, and the fluid gets kinetic energy. The volute casing collects the fluid from the impeller and helps converting the kinetic energy into the pressure energy. The pumps are generally used for high discharge with low head applications.