Journal ArticleDOI
Experimental Study of Load Variations on Pressure Fluctuations in a Prototype Reversible Pump Turbine in Generating Mode
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This article is published in Journal of Fluids Engineering-transactions of The Asme.The article was published on 2017-07-01. It has received 93 citations till now. The article focuses on the topics: Turbine & Stress (mechanics).read more
Citations
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Journal ArticleDOI
Tip clearance on pressure fluctuation intensity and vortex characteristic of a mixed flow pump as turbine at pump mode
Yabin Liu,Lei Tan +1 more
TL;DR: In this paper, the authors investigated the pressure fluctuation intensity and vortex characteristic of a mixed flow pump as turbine at pump mode with a tip clearance, and showed that the tip leakage vortex (TLV) can be divided into four categories, namely, primary TLV, secondary TLV and entangled TLV.
Journal ArticleDOI
A review of methods for vortex identification in hydroturbines
TL;DR: A review of vortex identification methods for hydroturbines can be found in this paper, where the authors classified five different taxonomies based on five types of vortices (e.g. vortex rope in draft tube, Karman vortex, and inter-blade vortex) and discussed experimental techniques for vortex observation.
Journal ArticleDOI
Symmetrical and unsymmetrical tip clearances on cavitation performance and radial force of a mixed flow pump as turbine at pump mode
TL;DR: In this paper, the authors compared the performance of a pump with symmetrical and unsymmetrical tip clearance, and found that the un-symmetric tip clearance simultaneously influences the magnitude and direction of radial force.
Journal ArticleDOI
Spatial-temporal evolution of tip leakage vortex in a mixed flow pump with tip clearance
Yabin Liu,Lei Tan +1 more
TL;DR: In this article, the authors investigated the characteristics of the tip leakage vortex (TLV) in a mixed-flow pump by the numerical simulation using shear stress transport (SST) k-ω turbulence model with experimental validation.
Journal ArticleDOI
Effects of flow pattern on hydraulic performance and energy conversion characterisation in a centrifugal pump
TL;DR: An experimental investigation based on particle image velocimetry (PIV) technology was used to measure the internal flow in a low-specific-speed centrifugal pump impeller as mentioned in this paper.
References
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BookDOI
Flow-Induced Pulsation and Vibration in Hydroelectric Machinery : Engineer’s Guidebook for Planning, Design and Troubleshooting
TL;DR: The Lovejoy Coupling Handbook Lovejoy a Timken company two-equation eddy-viscosity turbulence models for List of abbreviations in oil and gas exploration and ENSEMBLE EMPIRICAL MODE DECOMPOSITION: A NOISE-ASSISTED Positive Displacement Pumps an overview | ScienceDirect The Equity Engineering Group, Inc.
Journal ArticleDOI
Unstable Characteristics and Rotating Stall in Turbine Brake Operation of Pump-Turbines
TL;DR: In this article, the authors investigated the mechanisms leading to vortex formation and rotating stall in a pump-turbine model by means of numerical simulations and test rig measurements and found that stationary vortex formation is associated with a total pressure rise over the machine and leads to the slope change of the characteristic.
Journal ArticleDOI
Experimental Evidence of Rotating Stall in a Pump-Turbine at Off-Design Conditions in Generating Mode
TL;DR: In this paper, an experimental investigation of the rotating stall in reduced scale model of a low specific speed radial pump-turbine at runaway and turbine brake conditions in generating mode is achieved.
Journal ArticleDOI
A review of rotating stall in reversible pump turbine
Yuning Zhang,Yulin Wu +1 more
TL;DR: The reversible pump turbines in pumped hydro energy storage plant suffer great instability problems in the well-known S-shaped characteristic regions, leading to the failure of the reversible pump turbine as discussed by the authors.
Journal ArticleDOI
Failure investigation of a large pump-turbine runner
Eduard Egusquiza,Carme Valero,Xingxing Huang,Esteve Jou,Alfredo Guardo,Cristian G. Rodríguez +5 more
TL;DR: In this paper, a failure investigation was conducted on a high-pressure machine with a large pump-turbine runner that was 2.9 m in diameter and had a maximum discharge rate of 32 m 3 /s.