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Hydrodynamics in Pumping and Hydropower Systems, 2nd Edition
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Hydrodynamics in Pumping and Hydropower Systems, 2nd Edition

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

Deadline for manuscript submissions: 20 October 2026 | Viewed by 1459

Special Issue Editors

Prof. Dr. Ling Zhou

E-Mail Website
Guest Editor
National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Interests: pumps; simulation; optimization; unsteady flow
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Wencheng Guo

E-Mail Website
Guest Editor
School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: hydropower system; hydraulics; hydrodynamics; hydraulic transient; turbine regulation; power system stability; unsteady flow; renewable energy; energy storage
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Pumping and hydropower systems are important pieces of equipment in the area of engineering, energy, water resources, and the chemical industry. Modeling complex flows is a major challenge in understanding the mechanism of liquid transport and energy conversion. Pumping and hydropower systems are complicated hydraulic systems. The design, operation, and maintenance of pumping and hydropower systems are based on the calculation and analysis of the hydraulic transient. The scientific outcomes from pumping and hydropower systems can help support engineers and decision makers in evaluating the energy performance and in implementing measures aiming to increase the operating efficiency and reliability. The research achievements provide a basis and guidance for the safe, stable, and efficient operation of pumping and hydropower systems.

The aim of this Special Issue is to provide an overview of these new challenges arising from a wide range of pumping and hydropower systems, including the design method, optimization, numerical simulation, turbulence modelling, etc. The topics will concern new findings and developments for a phenomenon mechanism analysis and/or engineering design guidance through a numerical simulation or experiments for pumping and hydropower systems.

Dr. Ling Zhou
Dr. Wencheng Guo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • pumps
  • turbines
  • hydropower
  • numerical simulation
  • experiments
  • vibration
  • hydraulic forces
  • hydraulic transient
  • stability
  • control strategy

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Related Special Issue

Published Papers (2 papers)

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Research

14 pages, 3304 KB  
Article
Influence of Blade Tip Clearance on External Characteristics and Internal Flow Pattern of Axial Flow Pumps
by Ling Bai, Jie Zhang, Lei Jiang, Hong Xu and Ling Zhou
Water 2026, 18(3), 437; https://doi.org/10.3390/w18030437 - 6 Feb 2026
Viewed by 525
Abstract
Axial flow pumps, widely utilized in critical fields such as agricultural irrigation, urban water diversion and flood control, play an indispensable role in large-scale water transport and drainage projects due to their high-flow and low-head characteristics. This study systematically investigates the influence of [...] Read more.
Axial flow pumps, widely utilized in critical fields such as agricultural irrigation, urban water diversion and flood control, play an indispensable role in large-scale water transport and drainage projects due to their high-flow and low-head characteristics. This study systematically investigates the influence of tip clearance on the external characteristics and internal flow field of a large-scale axial flow pump (model 1800GZX-125). By combining numerical simulations with experimental validation, a comparative analysis was conducted under four tip clearance sizes (3 mm, 12 mm, 17.5 mm, 24 mm) and various flow conditions. The results indicate that increasing the tip clearance generally reduces the pump head and peak efficiency. It also alters the blade pressure distribution, expands the low-pressure region, and intensifies tip leakage flow. While vorticity overall increases, it weakens locally under certain conditions due to changes in leakage flow patterns. Entropy generation analysis further reveals that larger clearances lead to significantly increased energy losses, thereby degrading external performance. These findings provide a theoretical basis for improving the performance and operational stability of axial flow pumps. Full article
(This article belongs to the Special Issue Hydrodynamics in Pumping and Hydropower Systems, 2nd Edition)
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26 pages, 6559 KB  
Article
Effects of Short, Flexible Fibers on Clogging and Erosion in a Sewage Pump
by Shuihua Zheng, Yiliang Li, Liuming Wang, Zenan Sun, Xueyan Zhao and Cheng Zhang
Water 2026, 18(1), 114; https://doi.org/10.3390/w18010114 - 2 Jan 2026
Viewed by 592
Abstract
Sewage pumps often handle complex multiphase flows containing rigid solid particles and flexible fibrous debris. These fibers can deform, entangle, and alter the flow, leading to clogging and the uneven erosion of pump components. In this study, we use coupled CFD–DEM simulations (validated [...] Read more.
Sewage pumps often handle complex multiphase flows containing rigid solid particles and flexible fibrous debris. These fibers can deform, entangle, and alter the flow, leading to clogging and the uneven erosion of pump components. In this study, we use coupled CFD–DEM simulations (validated by experiments) to analyze how short flexible fibers move within a model sewage pump and how they influence pump erosion. We show that fibers injected near the inlet center tend to remain in the impeller region longer, especially as fiber diameter increases, causing greater contact with the impeller surface. When fibers coexist with sand-like particles, fibers become trapped near the impeller inlet and deflect incoming particles, creating additional collisions and irregular erosion patterns. In general, fibers alone induce minimal erosion, but their interaction with particles substantially amplifies impeller wear, producing more random pitting as fiber concentration rises. These findings highlight how fiber–particle interactions must be considered for reliable pump operation and design. Full article
(This article belongs to the Special Issue Hydrodynamics in Pumping and Hydropower Systems, 2nd Edition)
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