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RESEARCH PAPERS

LDV Measurements in a Centrifugal Slurry Pump: Water and Dilute Slurry Flows

[+] Author and Article Information
T. Cader, O. Masbernat, M. C. Roco

Department of Mechanical Engineering, University of Kentucky, Lexington, KY 40506-0046

J. Fluids Eng 114(4), 606-615 (Dec 01, 1992) (10 pages) doi:10.1115/1.2910074 History: Received May 23, 1991; Online May 23, 2008

Abstract

A two-component LDV system was used to investigate single and two-phase flow in a representative section at the impeller outlet of a centrifugal slurry pump. Measurements were performed at Qn and 0.5 Qn with water and dilute slurry flows (C = 0.04 and 0.16 percent by volume). The solids consist of 0.8 mm glass beads. Particle Reynolds number is 65. The point liquid and solid velocities were determined with a Doppler signal amplitude discrimination approach. A rotary shaft encoder was used to represent the velocity as a function of the impeller angular position, and to investigate the effect of a finite number of blades on the flow. The data on liquid and slip velocity distributions show large scale flow structures which dominate the two-phase turbulent flow. Overall, solid particles have a larger radial velocity than the carrier fluid at the impeller outlet, but they lag the fluid in the circumferential direction.

Copyright © 1992 by The American Society of Mechanical Engineers
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