Jul 2026· ISH Journal of Hydraulic Engineering· Vol 32, pp. 776 - 792· 0 citations· 8 references
Abstract
ABSTRACT A three-dimensional CFD (Computational Fluid Dynamics) study was performed to evaluate the hydraulic performance of an existing flood‑protection pump sump designed for a discharge of 16.48 m3/s. The study aimed to assess flow uniformity at bell-mouth suction, quantify swirl angles, and identify subsurface vortex formation under operating conditions. A novel trident-shaped splitter combined with dividing walls is proposed to mitigate vortex-induced instabilities. The Reynolds-Averaged Navier–Stokes (RANS) equations combined with the realizable k–ε turbulence model and VOF (Volume of Fluid) approach were solved using STAR-CCM+. Results indicate that vortex intensity and flow separation observed in the original design are significantly reduced with the proposed modifications. Quantitative analysis shows swirl angles below 1.6°, well within Hydraulic Institute limits (5°). Mesh‑independence and pressure‑distribution analysis confirm improved hydraulic stability and reduced risk of mechanical damage.
This study presents a computationally efficient quasi-one-dimensional mathematical model based on the traveling wave method to investigate hydraulic shock attenuation using a gas-hydraulic damper in pipeline systems. Unlike conventional models, this formulation accounts for fluid compressibility and incorporates a non-...
B. Bakhtiyorov, K. Mamadaliev, Khayotjon Aminov et al.· Fluids· 0 citations
This study presents a Computational Fluid Dynamics (CFD) analysis of fluid flow in tank farm
pipelines, with emphasis on friction factor and pressure drop characteristics. The hydraulic
performance of the pipeline system was evaluated, and CFD predictions were validated using
empirical correlations. A three-dimensio...
Okokon Reagan Ekpenyong· International Journal of Eng...· 0 citations
This study addresses the need to improve the performance of split-type reaction water turbines (SRWTs) for low-head hydropower applications, where hydraulic losses and flow instability often limit torque output and efficiency. The objective was to optimize a modified SRWT by evaluating the effects of nozzle-edge sharpe...
Murshied Aloyod, J. Honra· E3S Web of Conferences· 0 citations
The Wells turbine is a key component in an Oscillating Water Column (OWC)-based ocean wave energy conversion system, yet its limited operating range due to leading-edge stall constrains overall system efficiency. This study presents an independent CFD benchmark of the performance of the Wells turbine with and without a...
Muhammad Nurfajriansyah Muslich, A. R. Prabowo, R. Adiputra et al.· Research in Education, Techn...· 0 citations
Hydraulic short-circuit (HSC) operation is an important approach to enhancing the operational flexibility of pumped-storage power plants (PSPPs). However, under this new operating mode, the flow characteristics in the bifurcated pipe deteriorate significantly, posing a threat to the efficiency of the piping system and...
Shan Zhu, M. Xia, Shi-Zhe Liu et al.· Machines· 0 citations
This study proposes a physics-guided optimization framework that integrates dimensional tolerance modeling, computational fluid dynamics, and Taguchi–Grey relational analysis to predict and improve the hydraulic performance of centrifugal pumps under realistic manufacturing variability. The framework establishes a quan...
S. C. Tung, M. C. Lin, C. C. Huang· Journal of Applied Fluid Mec...· 0 citations
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