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Advances in Hydrodynamics for Pumping Systems: Modeling, Optimization, and Applications, 2nd Edition

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydraulics and Hydrodynamics".

Deadline for manuscript submissions: 25 February 2027 | Viewed by 439

Editors

Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, China
Interests: flow-induced vibration and noise of rotating machinery; multiphase flow in fluid en-gineering; pump hydraulic design and energy-saving mechanism research
Special Issues, Collections and Topics in MDPI journals
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, China
Interests: multiphase flow, noise, and vibration in centrifugal pumps; rotor-stator interactions; pumps and pump-turbines; transient phenomena in pumps; experimental techniques in turbomachinery
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Pumping systems are integral to industrial processes, water supply, and energy systems, where hydrodynamic performance directly impacts efficiency, reliability, and sustainability. This Special Issue explores cutting-edge advancements in the hydrodynamics of pumping systems, focusing on theoretical, numerical, and experimental approaches to optimize their design and operation. Topics of interest include (but are not limited to) flow instabilities, cavitation phenomena, turbulence modeling, energy-efficient pump designs, and the application of machine learning for predictive maintenance. Contributions addressing multiphase flows, renewable energy integration (e.g., pumped hydro storage), and smart pumping technologies are also encouraged. This Issue aims to bridge the gap between fundamental fluid dynamics research and practical engineering solutions, fostering innovation in sectors such as agriculture, wastewater management, oil and gas, and HVAC (Heating, Ventilation, and Air Conditioning) systems. By collating high-quality research on novel materials, computational fluid dynamic (CFD) simulations, and experimental validations, this Special Issue will serve as a platform for researchers and practitioners to share insights on overcoming hydrodynamic challenges in pumping systems. We invite original research articles, case studies, and reviews that address emerging trends, sustainability, and cost-effective strategies in this critical field.

Dr. Qiaorui Si
Dr. Asad Ali
Dr. Yandong Gu
Guest Editors

Manuscript Submission Information

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Keywords

  • pumping systems
  • hydrodynamics
  • multiphase flow
  • cavitation
  • computational fluid dynamics (CFD)
  • energy efficiency
  • turbulence modeling
  • design optimization
  • transient flow
  • renewable energy integration

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Published Papers (1 paper)

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Research

24 pages, 5912 KB  
Article
Draft Tube Wake Vortex Evolution and Suppression in a Pump as Turbine with Splitter Blades Based on a Modified Burgers Vortex Model
by Chenguang Wang, Wang Zheng, Yingxiao Shi, Hua Liu, Dazhuan Wu and Qiaorui Si
Water 2026, 18(16), 1925; https://doi.org/10.3390/w18161925 - 7 Aug 2026
Viewed by 304
Abstract
Owing to its efficient energy recovery capability, the pump as turbine (PAT) has attracted considerable attention and has been widely applied in micro hydropower systems. However, under off-design conditions, large-scale helical vortex ropes are readily induced in the draft tube, causing severe hydraulic [...] Read more.
Owing to its efficient energy recovery capability, the pump as turbine (PAT) has attracted considerable attention and has been widely applied in micro hydropower systems. However, under off-design conditions, large-scale helical vortex ropes are readily induced in the draft tube, causing severe hydraulic losses and flow instability. Because existing theoretical models do not account for the slip effect at the impeller outlet, this study combines vortex dynamics theory with numerical simulation and introduces a correction coefficient to develop a Burgers vortex-based analytical wake vortex model for a PAT with splitter blades. The model is verified by its ability to predict the peak tangential velocity and radial decay trend of the vortex core. In addition, the influence of draft tube configuration on vortex rope evolution is revealed using the Liutex vortex identification method and enstrophy analysis. The results show that the geometric curvature of the elbow draft tube induces vortex rope breakup and high energy dissipation. Finally, entropy production theory is used to quantitatively evaluate the vortex suppression benefit and hydraulic loss caused by deflector plates. The results indicate that the transverse deflector plate (TDP) provides a significantly better suppression effect than the longitudinal deflector plate (LDP) by disrupting the circumferential continuity of the vortex rope. Although increasing the insertion depth of the deflector plate improves vortex suppression, it induces non-negligible local high-entropy production on the upstream-facing surface (US). This study clarifies the physical mechanism of wake vortices in a PAT with splitter blades and provides theoretical guidance for efficient PAT operation and wake vortex control. Full article
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