Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
4.7
2.5
Journals
Machines
Special Issues
Advanced Research and Development in Fluid Machinery: Design, Optimization, and...
share announcement

Advanced Research and Development in Fluid Machinery: Design, Optimization, and Applications

A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Machine Design and Theory".

Deadline for manuscript submissions: 31 January 2026 | Viewed by 1698

Special Issue Editors

Dr. Yandong Gu

E-Mail Website
Guest Editor
College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, China
Interests: Impeller pumps; rotor-stator cavity; fluid lubrication; unteady flow; hydraulic design
Special Issues, Collections and Topics in MDPI journals
Dr. Christopher Stephen

E-Mail Website
Guest Editor
Deep Sea Technologies, National Institute of Ocean Technology, Chennai 600100, Tamil Nadu, India
Interests: impeller pumps; cavitation; computational fluid dynamics; variable ballast system
Dr. Leilei Ji

E-Mail Website
Guest Editor
National Research Center for Pumps and Systems, Jiangsu University, Zhenjiang, China
Interests: Computational Fluid Dynamics (CFD); fluid machinery; unsteady flow; hydraulic machinery; cavitation; multiphase flow; optimization of pump
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Guoyi Peng

E-Mail Website
Guest Editor
College of Engineering, Nihon University, Koriyama 963-8643, Japan
Interests: water jet; cavitation; multiphase flow; fluid machinery

Special Issue Information

Dear Colleagues,

Fluid machinery components, such as pumps, water turbines, and marine propellers, play a crucial role in optimizing the efficiency and functionality of various systems. However, design methods for such systems and internal flow studies continue to face numerous challenges, including improving their overall efficiency under diverse operating conditions, understanding multiphase flow mechanisms, and ensuring the stability of bearing–rotor systems. By employing innovative design approaches and advanced research techniques, we can foster the development of fluid machinery and deepen our understanding of the intricate flows encountered in these systems.

We invite scholars and researchers to submit their contributions to our Special Issue ”Advanced Research and Development in Fluid Machinery: Design, Optimization, and Applications”. Topics of interest include, but are not limited to, the following:

  • Novel designs for enhancing the performance of fluid machinery;
  • Innovative studies on multiphase flow in fluid machinery;
  • Investigations into bearing–rotor systems in fluid machinery.

We welcome original research articles, reviews, and case studies that address these critical areas, and invite authors to join us in improving the performance of hydraulic machinery through cutting-edge research and development.

Dr. Yandong Gu
Dr. Christopher Stephen
Dr. Leilei Ji
Prof. Dr. Guoyi Peng
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 100 words) can be sent to the Editorial Office for announcement on this website.

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. Machines is an international peer-reviewed open access monthly 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 2400 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

  • fluid machinery
  • pump
  • bearing–rotor systems
  • multiphase flow
  • water turbine performance
  • Computational Fluid Dynamics (CFD)
  • fluid-structure interaction

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (4 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

26 pages, 6597 KB  
Article
Analysis of Flow Characteristics in a Hydrogen Circulation Pump Featuring a Variable Radius Circular Arc
by Jiankang Lu, Zhengdian Xu, Changdong Wan and Renrui Wang
Machines 2025, 13(9), 869; https://doi.org/10.3390/machines13090869 - 18 Sep 2025
Viewed by 186
Abstract
This study proposes a novel variable-radius arc rotor, developed based on the conventional arc rotor, for application in a hydrogen circulation pump. Numerical simulations are conducted to analyze and compare the flow characteristics of the optimized rotor with those of the baseline rotor. [...] Read more.
This study proposes a novel variable-radius arc rotor, developed based on the conventional arc rotor, for application in a hydrogen circulation pump. Numerical simulations are conducted to analyze and compare the flow characteristics of the optimized rotor with those of the baseline rotor. Results show that the optimized rotor increases outlet mass flow rates by over 15%; however, it has little effect on pressure pulsation, indicating limited influence on flow stability. Flow field analysis reveals that the optimized rotor promotes a more stable and streamlined internal velocity distribution, suppressing localized disturbances and vortices that are prevalent with the baseline rotor. Furthermore, assessments of turbulent kinetic energy (TKE) and three-dimensional vortex structures show that the optimized rotor confines high-energy zones to essential areas and facilitates controlled vortex evolution. These effects collectively lead to lower turbulence intensity, reduced energy loss, improved operational efficiency, and enhanced mechanical reliability of the pump. Full article
(This article belongs to the Special Issue Advanced Research and Development in Fluid Machinery: Design, Optimization, and Applications)
►▼ Show Figures

Figure 1

18 pages, 3836 KB  
Article
Investigation of Blade Root Clearance Flow Effects on Pressure Fluctuations in an Axial Flow Pump
by Fan Meng, Yanjun Li, Mingzhe Li and Chao Ning
Machines 2025, 13(8), 733; https://doi.org/10.3390/machines13080733 - 18 Aug 2025
Viewed by 432
Abstract
This study investigates the leakage vortex influence on pressure pulsation characteristics within a vertical axial flow pump. Three impeller configurations with blade root clearance (δ) of 2.7–8.0 mm were designed to analyze geometric effects on internal flow dynamics. Unsteady RANS simulations [...] Read more.
This study investigates the leakage vortex influence on pressure pulsation characteristics within a vertical axial flow pump. Three impeller configurations with blade root clearance (δ) of 2.7–8.0 mm were designed to analyze geometric effects on internal flow dynamics. Unsteady RANS simulations predicted flow structures under multiple operating conditions (0.8–1.2Qdes). Fast Fourier Transform (FFT) extracted frequency–domain and time–frequency characteristics of pressure pulsations in critical flow regions. Key results reveal: (1) δ enlargement expands low-pressure zones within blade channels due to enhanced leakage vortices; (2) leading-edge pulsation shows 8.2–11.7% reduction in peak-to-peak amplitude and fundamental frequency magnitude with increasing δ; (3) trailing-edge response exhibits non-monotonic behavior, with maximum amplitude at δ = 5.0 mm (42.2% increase at design flow). These findings demonstrate that blade root clearance optimization requires condition-dependent thresholds to balance leakage management and pulsation control. Full article
(This article belongs to the Special Issue Advanced Research and Development in Fluid Machinery: Design, Optimization, and Applications)
►▼ Show Figures

Figure 1

26 pages, 16083 KB  
Article
Impact of the Magnetic Gap in Submerged Axial Flux Motors on Centrifugal Pump Hydraulic Performance and Internal Flow
by Qiyuan Zhu, Yandong Gu and Junjie Bian
Machines 2025, 13(8), 721; https://doi.org/10.3390/machines13080721 - 13 Aug 2025
Viewed by 380
Abstract
The integration of axial flux motors into canned motor pumps offers a promising approach to overcome the efficiency and size limitations of traditional designs, particularly in critical sectors like aerospace. However, the hydrodynamics in magnetic gap between the stator and rotor are poorly [...] Read more.
The integration of axial flux motors into canned motor pumps offers a promising approach to overcome the efficiency and size limitations of traditional designs, particularly in critical sectors like aerospace. However, the hydrodynamics in magnetic gap between the stator and rotor are poorly understood. This study investigates the effect of magnetic gap on performance and internal flow. Six magnetic gap schemes are developed, ranging from 0.2 to 1.2 mm. Numerical simulations are conducted, and simulation results showed good agreement with experimental data. The magnetic gap exhibits a non-linear effect on performance. The peak head coefficient occurs at a 0.4 mm gap and maximum efficiency at 1.0 mm. At a 0.2 mm gap, strong viscous shear forces increase disk friction loss and create high-vorticity flow. As the gap widens, flow transitions from viscosity-dominated to inertia-dominated, leading to a more ordered flow structure. The blade passing frequency is the dominant frequency. For a gap of 0.8 mm, the pressure fluctuation intensity is lowest. By analyzing performance, head coefficient, velocity, vorticity, entropy production, and pressure fluctuations, a gap of 0.8 mm is identified as the optimal design. This study provides critical guidance for optimizing the design of axial flux canned motor pumps. Full article
(This article belongs to the Special Issue Advanced Research and Development in Fluid Machinery: Design, Optimization, and Applications)
►▼ Show Figures

Figure 1

16 pages, 10446 KB  
Article
Transient Vortex Dynamics in Tip Clearance Flow of a Novel Dishwasher Pump
by Chao Ning, Yalin Li, Haichao Sun, Yue Wang and Fan Meng
Machines 2025, 13(8), 681; https://doi.org/10.3390/machines13080681 - 2 Aug 2025
Viewed by 368
Abstract
Blade tip leakage vortex (TLV) is a critical phenomenon in hydraulic machinery, which can significantly affect the internal flow characteristics and deteriorate the hydraulic performance. In this paper, the blade tip leakage flow and TLV characteristics in a novel dishwasher pump were investigated. [...] Read more.
Blade tip leakage vortex (TLV) is a critical phenomenon in hydraulic machinery, which can significantly affect the internal flow characteristics and deteriorate the hydraulic performance. In this paper, the blade tip leakage flow and TLV characteristics in a novel dishwasher pump were investigated. The correlation between the vorticity distribution in various directions and the leakage vortices was established within a rotating coordinate system. The results show that the TLV in a composite impeller can be categorized into initial and secondary leakage vortices. The initial leakage vortex originates from the evolution of two corner vortices that initially form at different locations within the blade tip clearance. This vortex induces pressure fluctuations at the impeller inlet; its shedding is identified as the primary contributor to localized energy loss within the flow passage. These findings provide insights into TLVs in complex pump geometries and provide solutions for future pump optimization strategies. Full article
(This article belongs to the Special Issue Advanced Research and Development in Fluid Machinery: Design, Optimization, and Applications)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-4
Back to TopTop