A Numerical Study on Labyrinth Screw Pump (LSP) Performance under Viscous Fluid Flow

In this study, fluid viscosity effects on LSP performance in terms of boosting pressure were numerically investigated. A water–glycerin mixture with different concentrations corresponding to varying apparent viscosities was flowed through an in-house manufactured LSP under various flow conditions, e...

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Bibliographic Details
Published in:Energies (Basel) 2023-08, Vol.16 (16), p.5997
Main Authors: Ke, Wenqi, Zeng, Hao, Wang, Zhuoyu, Yu, Hong, Liu, Yaxin, Zheng, Danzhu, Zhu, Jianjun, Zhu, Haiwen
Format: Article
Language:English
Subjects:
Analysis
CFD
Design
Efficiency
fluid mechanics
Fluids
Glycerin
Glycerol
high viscosity flow
Hydraulics
labyrinth screw pump
Optimization
Simulation
Turbulence models
Viscosity
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Summary:In this study, fluid viscosity effects on LSP performance in terms of boosting pressure were numerically investigated. A water–glycerin mixture with different concentrations corresponding to varying apparent viscosities was flowed through an in-house manufactured LSP under various flow conditions, e.g., changing flow rates, rotational speeds, and fluid viscosities. The pressure increment between the intake and discharge of the LSP was recorded using the differential pressure transducer. The same pump geometries, fluid properties and flow conditions were incorporated into the numerical configurations, where three-dimensional (3D), steady-state, Reynolds-averaged Navier–Stokes (RANS) equations with a standard SST (shear stress transport) turbulence model were solved by a commercial CFD code. With the high-quality poly-hexcore grids, the simulated pressure increment was compared with the corresponding experimental measurement. The internal flow structures and characteristics within the cavities contained by the LSP impeller and diffuser were also analyzed. The good agreement between the numerical results against the experimental data verified the methodology adopted in this study.
ISSN:1996-1073
1996-1073
DOI:10.3390/en16165997