排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2012, Vol. 30 Issue (3): 274-278    DOI: 10.3969/j.issn.1674-8530.2012.03.006
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Numerical calculation of whole and non whole flow field in centrifugal pumps
(Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013,China)
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Abstract Based on the whole and nonwhole flow domain methods, the influence of flow domain on the numerical results in centrifugal pumps was investigated by calculating threedimensional steady incompressible turbulent flows. The standard k-ε turbulence model and virtual block technology were also adopted. The internal flow fields and hydraulic performance of five centrifugal pumps with different specific speeds were calculated at the design conditions. Also, the hydraulic performance obtained was compared with the test. It is observed that the influence of flow domain is remarkable. The whole flow domain method shows a higher accuracy rather than the nonwhole flow domain one, for example, the prediction accuracies in head and efficiency are improved by 1.54% and 1.67%, respectively. The static pressure distributions in the impellers obtained by the two methods are basically the same, but those in the volutes are significantly different. The velocity profile in the gap between impeller and volute is layered for the whole domain method. However, it is triangular for the nonwhole domain one. The secondary flow pattern within the crosssections of volute is not completely symmetry. It is believed that the flows in the wearingring gap and the chamber between the impeller and the pump casing, which have been considered in the whole flow domain method, affect the development of that secondary flow.
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Articles by authors
DONG Liang
LIU Hou-Lin
TAN Ming-Gao
WANG Kai
WANG Yong
Key wordscentrifugal pump   whole flow field   nonwhole flow field   numerical simulation   performance prediction     
Received: 2010-12-06; Published: 2012-04-10
Cite this article:   
DONG Liang,LIU Hou-Lin,TAN Ming-Gao et al. Numerical calculation of whole and non whole flow field in centrifugal pumps[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(3): 274-278.
 
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