Journal ArticleDOI
Effect of Trailing-Edge Modification of a Mixed-Flow Pump
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TLDR
In this article, the effects of TE modification on the performance and internal flow of a mixed-flow pump are investigated through computational fluid dynamics (CFD) analysis, and the results show that TE modification significantly improves pump efficiency in the high flow rate region by more than 10%.Abstract:
Modern pumps are designed to guarantee a sufficiently large operating range or to satisfy the performance requirements relative to more than one operating point. This study applies trailing-edge (TE) modification method based on TE rounding in the suction surface to widen the operating range of a mixed-flow pump. The effects of TE modification on the performance and internal flow of the mixed-flow pump are investigated through computational fluid dynamics (CFD) analysis. Local Euler head distribution is introduced to reveal the pattern of energy growth along the blade-aligned (BA) streamwise location. A pump model with TE modification is tested, and numerical results agree well with experimental data. The results show that TE modification significantly improves pump efficiency in the high flow rate region by more than 10%. The best pattern of normalized local Euler head distribution (NLEHD) is a convex curve of nearly constant growth rate. The overall heads are also improved, and the flow near the exit of the impeller exhibits better uniformity. This finding demonstrates that a small change in the TE of the impeller can influence flow structure in most areas of impeller channels and that the local Euler head distribution is closely related to pump efficiency. TE modification can effectively improve the performance of the mixed-flow pump with high flow rate.read more
Citations
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Influence of the Blade Trailing Edge Profile on the Performance and Unsteady Pressure Pulsations in a Low Specific Speed Centrifugal Pump
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Role of blade rotational angle on energy performance and pressure fluctuation of a mixed-flow pump
TL;DR: In this article, the role of blade rotational angle in the energy performance and pressure fluctuation of a mixed-flow pump was investigated through experimental measurement and numerical simulation through an experimental simulation.
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Effects of modifying the blade trailing edge profile on unsteady pressure pulsations and flow structures in a centrifugal pump
TL;DR: In this paper, the effects of modifying the blade pressure side (EPS profile) on unsteady pressure pulsations and flow structures in a low specific speed centrifugal pump are carried out by experimental and numerical methods.
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Influence of T-shape tip clearance on performance of a mixed-flow pump:
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CFD simulation and experimental study of oil viscosity effect on multi-stage electrical submersible pump (ESP) performance
TL;DR: In this article, the authors investigated the effect of oil viscosity on ESP performance by experimental study and computational fluid dynamics (CFD) simulations, which revealed that recirculation flow at impeller blade trailing edge is more prominent at lower liquid flow rates and the same geometries, fluid properties and flow characteristics are implemented into CFD simulations.
References
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Journal ArticleDOI
On the Design Criteria for Suppression of Secondary Flows in Centrifugal and Mixed Flow Impellers
TL;DR: In this article, a set of guidelines for the systematic design of mixed flow and centrifugal compressors and pumps with suppressed secondary flows and a uniform exit flow field is presented, which are validated experimentally by comparing the performance of the inverse designed centrifugal compressor impeller with the corresponding conventional impeller.
Journal ArticleDOI
Internal hydraulic analysis of impeller rounding in centrifugal pumps as turbines
Punit Singh,Franz Nestmann +1 more
TL;DR: In this paper, the effect of rounding of the sharp edges at the impeller periphery (or turbine inlet) has shown tendencies of performance enhancement in pump as turbine applications, and the authors concluded that the effect is very important for performance optimization and recommends its application on all pump as turbines projects.
Journal ArticleDOI
Suppression of Secondary Flows in a Mixed-Flow Pump Impeller by Application of Three-Dimensional Inverse Design Method: Part 1—Design and Numerical Validation
TL;DR: In this article, the authors describe the design of the blade geometry of a medium specific speed mixed flow pump impeller by using a three-dimensional inverse design method in which the blade circulation (or rV θ ) is specified.
Hydrodynamic design of pump diffuser using inverse design method and CFD
Akira Goto,Mehrdad Zangeneh +1 more
TL;DR: In this paper, a new approach to optimize a pump diffuser is presented, based on a three-dimensional inverse design method and a Computational Fluid Dynamics (CFD) technique.
Journal ArticleDOI
On the Role of Leading-Edge Bumps in the Control of Stall Onset in Axial Fan Blades
TL;DR: In this paper, the effects of the modified leading edge in terms of lift-to-drag performance and the influence of camber on such parameters were investigated using the OpenFOAM solver.