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Application of Multiphase Flow Separation Technology in Energy Engineering
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Application of Multiphase Flow Separation Technology in Energy Engineering

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 2058

Special Issue Editors

Dr. Wei Jiang

E-Mail Website
Guest Editor
Institute of Water Resources and Hydropower Research, Northwest A&F University, Yangling 712100, China
Interests: mutiphase flow in turbomachinery
Dr. Naixing Yang

E-Mail Website
Guest Editor
School of mechanical and electrical engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Interests: engineering thermophysical problems in energy storage
Dr. Xiangyuan Zhu

E-Mail Website
Guest Editor
School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China
Interests: numerical simulations; singlephase or multiphase flow within turbomachinery

Special Issue Information

Dear Colleagues,

With the rapid development of science and technology, energy issues have become a problem that needs to be focused on. In energy engineering, the research on the operation mechanism and mechanism of machinery used for energy conversion is one of the main methods to solve energy problems.

Multiphase flow is a common complex flow problem in related machinery. Research on related mechanisms, mathematical modeling and simulation studies can help predict and optimize conditions and reduce the workload of obtaining the expected result. The study of multiphase flow can help to improve the operation efficiency and utilization level of energy machinery.

This Special Issue focuses on all aspects of addressing the above challenges, namely the following:

  • Multiphase flow in energy machinery;
  • Simulation and mathematical optimization in the study of flow mechanism;
  • The relationship between multiphase flow mechanism and mechanical operation;
  • Traditional modeling and numerical simulation methods for multiphase flow research.

Dr. Wei Jiang
Dr. Naixing Yang
Dr. Xiangyuan Zhu
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. Processes 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

  • energy engineering
  • multiphase flow
  • simulation
  • turbomachinery
  • flow mechanism

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Published Papers (2 papers)

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Research

24 pages, 11823 KiB  
Article
Design Optimization of an Inclined Inlet Channel, an Archimedean Spiral Basin, and a Discharge Cone in a Gravitational Vortex Turbine
by Rubén Gómez, Laura Velásquez, Ainhoa Rubio-Clemente and Edwin Chica
Processes 2025, 13(5), 1533; https://doi.org/10.3390/pr13051533 - 16 May 2025
Viewed by 632
Abstract
This research focused on optimizing the design of a gravitational vortex turbine by refining the inclined inlet channel, the Archimedean spiral basin, and the discharge cone to improve system efficiency. The study employed computational fluid dynamics (CFD) simulations combined with response surface methodology [...] Read more.
This research focused on optimizing the design of a gravitational vortex turbine by refining the inclined inlet channel, the Archimedean spiral basin, and the discharge cone to improve system efficiency. The study employed computational fluid dynamics (CFD) simulations combined with response surface methodology (RSM) to systematically analyze the impact of key geometric parameters on energy extraction. The investigated parameters included the inclined angle of the channel, outlet diameter ratio, inlet channel height ratio, and inlet channel width ratio. Among these, the outlet diameter ratio was found to have the most significant influence on efficiency. The numerical results were validated through experimental testing, confirming the accuracy of the optimized design, which achieved a maximum efficiency of 87.7% at 71.54 RPM. This enhancement highlights the novelty of incorporating an Archimedean spiral basin and an inclined inlet channel, demonstrating the effectiveness of the proposed optimization methodology in maximizing energy extraction. Full article
(This article belongs to the Special Issue Application of Multiphase Flow Separation Technology in Energy Engineering)
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15 pages, 5529 KiB  
Article
Quantitative Evaluation of Deformation in High-Speed Magnetic Flux Leakage Signals for Weld Defects in Oil and Gas Pipelines
by Lemei Ren, Wenlong Liu, Bo Zhu, Guansan Tian, Hui Lu and Linkai Yan
Processes 2024, 12(11), 2396; https://doi.org/10.3390/pr12112396 - 30 Oct 2024
Viewed by 988
Abstract
Complex multiphase flow in oil and gas pipelines raises safety risks. Magnetic flux leakage (MFL) detection effectively identifies pipeline defects. However, the high-speed movement of MFL inspection tools induces motion-induced eddy currents (MIECs), complicating defect recognition and quantification. Most prior research has primarily [...] Read more.
Complex multiphase flow in oil and gas pipelines raises safety risks. Magnetic flux leakage (MFL) detection effectively identifies pipeline defects. However, the high-speed movement of MFL inspection tools induces motion-induced eddy currents (MIECs), complicating defect recognition and quantification. Most prior research has primarily focused on rectangular defects, leaving a gap in understanding the impact of MIECs on weld defects. This paper proposes the amplitude and shape deformation coefficients to analyze the influence of velocity on various weld defects, including internal reinforcement, lack of penetration, crack, external corrosion, internal corrosion, porosity, and lack of fusion. Utilizing these coefficients, this study examines the influence of the defect size and magnetizer configuration on these velocity-induced effects. The results show that the shape deformation coefficients range from 2.75 to 3.57 for Bx and from −0.13 to −0.3 for By, indicating a significant change in the MFL signal shape at 10 m/s compared to 0 m/s. The amplitude deformation coefficients for lack of penetration, internal corrosion, and porosity range from −0.01 to 0.1 for Bx, and from 0.86 to 0.98 for By, suggesting a decrease in peak-to-peak values. In contrast, other defects exhibit an increase in peak-to-peak values, indicating that the velocity effect may enhance the MFL signal. Also, the defect size and magnetizer configuration can affect the velocity effect on signals. These findings provide essential guidance for quantifying defect sizes and a solid foundation for designing more effective magnetization devices. Full article
(This article belongs to the Special Issue Application of Multiphase Flow Separation Technology in Energy Engineering)
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