Aug 2026· Water· Vol 18, pp. 2056· 0 citations· 24 references
Abstract
To investigate the influence of inlet structure optimization on pressure pulsation and energy transport characteristics in mixed-flow pumps, this study employed experimental and numerical calculation methods to analyze both original and optimized models. The SST-SAS turbulence model was selected for flow field computation. The experimental and numerical results showed that inlet optimization increased the head at the design condition by 1.52 m, improved the efficiency by 5.38%, and reduced the pressure pulsation amplitude by more than 90%. Analysis of energy transport term distribution characteristics within the pump revealed the mechanism behind pulsation intensity improvement: the pressure propulsion power distribution in the impeller became more stable, while the Lamb vector divergence dissipation regions and enstrophy dissipation regions substantially decreased, thereby increasing the proportion of pressure propulsion power contribution. The enhanced energy transport characteristics and improved flow field stability in the impeller region collectively optimized energy conversion performance within the impeller.
To address the complex internal flow characteristics and diverse unsteady excitation sources in centrifugal pumps, this study systematically investigates the predictive capabilities of different turbulence models on internal flow features and vibration responses. Taking an IS65-50-125 centrifugal pump as the research o...
Yu-Qin Wang, Tao Shi, Guang Li· AIP Advances· 0 citations
Pressure pulsation of pump-turbines under part-load operation exhibits pronounced multi-scale and strongly coupled characteristics, which are closely related to the hydraulic stability and vibration safety of pumped storage units. In this study, the part-load operation of a pump-turbine under turbine-mode conditions is...
Yuan Tang, Ming-Kun Fang, Ran Tao et al.· Journal of Physics, Conferen...· 0 citations
This study performed a 3D CFD of the internal flow characteristics of a centrifugal pump using COMSOL Multiphysics. The physical geometry of the pump was developed as a complete 3D representation including the pump casing, impeller with five blades, inlet passage and outlet region. This study used a numerical simulatio...
Ashwani K. Sharma, Khasan Tilyakov, A. Kudratov et al.· EPJ Web of Conferences· 0 citations
Disk friction loss is remarkably significant in low specific speed centrifugal pumps, originating from the complex flow interference within the rotor-stator cavity. To reveal the hydrodynamic mechanism and energy dissipation characteristics of this loss, this study investigates the flow in the rotor-stator cavity under...
Ming-Kun Fang, Kento Sakai, Ran Tao et al.· Journal of Physics, Conferen...· 0 citations
Multistage centrifugal pumps operating as turbines (PATs) are important devices for hydraulic energy recovery. However, vortex-induced flow instabilities cause pressure pulsations and efficiency losses, especially in configurations with complex interstage interactions. In offshore oil and gas field systems—such as plat...
Xiao-Jun Li, Yuan-Hong Xu, Zhi-Cong Wei et al.· International Journal of Flu...· 0 citations
: This study investigates the influence of the cavitation coefficient on the internal flow field and pressure fluctuation characteristics of a pump-turbine using numerical simulations validated against experimental measurements. The validated model is then used to analyze hydraulic performance and cavitation-induced fl...
Chao Liu, Jian-Ying He· Fluid Dynamics & Materia...· 0 citations
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