Hydraulic performance numerical simulation of high specific speed mixed-flow pump based on quasi three-dimensional hydraulic design method

This research adopts the quasi three-dimensional hydraulic design method for the impeller of high specific speed mixed-flow pump to achieve the purpose of verifying the hydraulic design method and improving hydraulic performance. Based on the two families of stream surface theory, the direct problem...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2013-01, Vol.52 (3), p.32012-6
Main Authors: Zhang, Y X, Su, M, Hou, H C, Song, P F
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Design optimization
Design techniques
Fluid flow
Hydraulic models
Hydraulics
Impellers
Internal flow
Inverse problems
Iterative methods
Mathematical models
Meridional flow
Pumps
Static pressure
Three dimensional
Turbulence
Turbulence models
Turbulent flow
Two-equation turbulence model
Velocity distribution
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Summary:This research adopts the quasi three-dimensional hydraulic design method for the impeller of high specific speed mixed-flow pump to achieve the purpose of verifying the hydraulic design method and improving hydraulic performance. Based on the two families of stream surface theory, the direct problem is completed when the meridional flow field of impeller is obtained by employing iterative calculation to settle the continuity and momentum equation of fluid. The inverse problem is completed by using the meridional flow field calculated in the direct problem. After several iterations of the direct and inverse problem, the shape of impeller and flow field information can be obtained finally when the result of iteration satisfies the convergent criteria. Subsequently the internal flow field of the designed pump are simulated by using RANS equations with RNG k-ϵ two-equation turbulence model. The static pressure and streamline distributions at the symmetrical cross-section, the vector velocity distribution around blades and the reflux phenomenon are analyzed. The numerical results show that the quasi three-dimensional hydraulic design method for high specific speed mixed-flow pump improves the hydraulic performance and reveal main characteristics of the internal flow of mixed-flow pump as well as provide basis for judging the rationality of the hydraulic design, improvement and optimization of hydraulic model.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/52/3/032012