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International Journal of Rotating Machinery
Volume 2012 (2012), Article ID 413674, 7 pages
http://dx.doi.org/10.1155/2012/413674
Research Article

Design of a Turbulence Generator of Medium Consistency Pulp Pumps

Research Center of Fluid Machinery Engineering and Technology of Jiangsu University, Zhenjiang, Jiangsu 212013, China

Received 30 April 2011; Revised 26 November 2011; Accepted 8 December 2011

Academic Editor: Arthur Lees

Copyright © 2012 Hong Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The turbulence generator is a key component of medium consistency centrifugal pulp pumps, with functions to fluidize the medium consistency pulp and to separate gas from the liquid. Structure sizes of the generator affect the hydraulic performance. The radius and the blade laying angle are two important structural sizes of a turbulence generator. Starting with the research on the flow inside and shearing characteristics of the MC pulp, a simple mathematical model at the flow section of the shearing chamber is built, and the formula and procedure to calculate the radius of the turbulence generator are established. The blade laying angle is referenced from the turbine agitator which has the similar shape with the turbulence generator, and the CFD simulation is applied to study the different flow fields with different blade laying angles. Then the recommended blade laying angle of the turbulence generator is formed to be between 60° and 75°.