Analysis on Energy Conversion of Screw Centrifugal Pump in Impeller Domain Based on Profile Lines

Abstract

In order to study the power capability of impeller and energy conversion mechanism of screw centrifugal pump, the methods of theoretical analysis and numerical simulation by computational fluid dynamics theory (CFD) were adopted, specifically discussing the conditions of internal flow such as velocity, pressure, and concentration. When the medium is sand-water two-phase flow and dividing the rim of the lines and wheel lines of screw centrifugal pump to segments to analyze energy conversion capabilities which along the impeller profile lines with the dynamic head and hydrostatic head changer, the results show that the energy of fluid of the screw centrifugal pump is provided by helical segment, and the helical segment of the front of the impeller has played the role of multilevel increasing energy; the sand-water two phases move at different speeds because the different force field and the impeller propeller and centrifugal effect. As liquid phase is the primary phase, the energy conversion is mainly up to the change of liquid energy, the solid phase flows under the wrapped action of liquid, and solid energy is carried out through liquid indirectly.

Effect of Impeller Size on the Performance of a Single Blade Pump

“…There are many articles that deal with the design of single-blade impellers, the analysis of the flow and the resulting consequences such as the radial load on the impeller. These are, for example, the papers [7], [11], [12] and [14]. The effect of the number of blades on the pump operation is discussed in [4].…”

Effect of a blade shape on hydraulic and mechanical properties of a single - blade impeller

“…Centrifugal pumps with a single-blade impeller represent an important segment of the hydraulic machines in the wastewater pumping area. The advantages include a large passed solids size and good cavitation properties by remaining a relatively high efficiency in the wide flowrate range [4]. The construction is generally simple and massive, so single-blade centrifugal pumps are characterized by long lifetime and high reliability during the running process.…”

Analysis of fluid flow translation conveyors

“…In the calculations of these inventions and many other similar structures, the theory of continuous environmental mechanics, combined with analytical approximations or computer technology, is applicable. Examples of such calculations are described in many books and publications [5][6][7][8][9][10]. The effects of impeller eccentricity and the Reynolds number on the mixing performance were studied for Rushton turbine stirred tank systems operated in the laminar regime (Re < 10) [5].…”

“…The effects of impeller eccentricity and the Reynolds number on the mixing performance were studied for Rushton turbine stirred tank systems operated in the laminar regime (Re < 10) [5]. Analysis on energy conversion of a screw centrifugal pump in impeller is studied in [6]. An integrated overview of incompressible flow turbomachines and transport options as pumps, including the theory and experimental studies, are described in the work [7].…”