Numerical simulation of the effect of solid-volume fraction on induction force of screw centrifugal pump

• Published in: IOP conference series. Earth and environmental science Vol. 15; no. 3; p. 32048
• Main Authors: Han, W, Ma, W, Li, R N, Gao, Y, Gao, H
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 26.11.2012
• Subjects: Axial forces; Centrifugal force; Centrifugal pumps; Computational fluid dynamics; Finite element method; Impellers; Mathematical models; Phase volume fraction; Pressure; Reynolds averaged Navier-Stokes method; Rotation; Rotor stator interactions; Rotors; Solid phases; Stators; Stress concentration; Thrust; Trends; Two phase flow; Unsteady flow
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/15/3/032048

The solid-liquid two-phase unsteady flow in a screw centrifugal pump was simulated with unsteady Reynolds averaged Navier-Stokes equations and sliding mesh technology. The distribution of the pressure at volute outlet, radial force, axial force and total moment are presented in this paper. The effects of solid-phase volume fractions on the value and direction of the induction thrust are analyzed. Seven monitor points are arranged on the inner surface of volute along the impeller rotation. The characters of the induced force on the monitor points with different solid-phase volume fractions are investigated. The results indicated that different solid-volume fractions have litter effects on the trend and direction of pressure at volute, radial force, axial force and total moment during one period, but the value of induction forces increase with the increasing of solid-volume fraction; The pressure fluctuation on the monitor points has with different trends during one period, which depends on the direction of the monitor points and the rotor-stator interaction strength of impeller and volute. With the rotation of impeller, the values of pressure in the whole passage are further increased along the rotation direction with the role of impeller vane. Solid-phase volume fraction has few effects on change trend of induced thrust as radial force and axial force on the monitor points, but the values of pressure on the monitor points increase with the increasing of solid-volume fraction.