Please use this identifier to cite or link to this item: https://doi.org/10.1155/2007/83641
Title: Numerical flow simulation in a centrifugal pump at design and off-design conditions
Authors: Cheah, K.W.
Lee, T.S. 
Winoto, S.H. 
Zhao, Z.M.
Issue Date: 2007
Citation: Cheah, K.W., Lee, T.S., Winoto, S.H., Zhao, Z.M. (2007). Numerical flow simulation in a centrifugal pump at design and off-design conditions. International Journal of Rotating Machinery 2007 : -. ScholarBank@NUS Repository. https://doi.org/10.1155/2007/83641
Abstract: The current investigation is aimed to simulate the complex internal flow in a centrifugal pump impeller with six twisted blades by using a three-dimensional Navier-Stokes code with a standard k-ε two-equation turbulence model. Different flow rates were specified at inlet boundary to predict the characteristics of the pump. A detailed analysis of the results at design load, Qdesign, and off-design conditions, Q = 0.43 Qdesign and Q = 1.45 Qdesign, is presented. From the numerical simulation, it shows that the impeller passage flow at design point is quite smooth and follows the curvature of the blade. However, flow separation is observed at the leading edge due to nontangential inflow condition. The flow pattern changed significantly inside the volute as well, with double vortical flow structures formed at cutwater and slowly evolved into a single vortical structure at the volute diffuser. For the pressure distribution, the pressure increases gradually along streamwise direction in the impeller passages. When the centrifugal pump is operating under off-design flow rate condition, unsteady flow developed in the impeller passage and the volute casing.
Source Title: International Journal of Rotating Machinery
URI: http://scholarbank.nus.edu.sg/handle/10635/85498
ISSN: 1023621X
DOI: 10.1155/2007/83641
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

76
checked on Dec 12, 2018

WEB OF SCIENCETM
Citations

15
checked on Dec 4, 2018

Page view(s)

15
checked on Dec 7, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.