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Energies
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Modeling and Optimization of Hydraulic Machinery and Its Systems
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Modeling and Optimization of Hydraulic Machinery and Its Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "L: Energy Sources".

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 974

Special Issue Editors

Dr. Wei Dong

E-Mail Website
Guest Editor
College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China
Interests: water turbine; pump; pump turbine; internal flow mechanism; water resource engineering; water conservancy and hydropower engineering, civil water conservancy
Dr. Zhengjing Shen

E-Mail Website
Guest Editor
College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Interests: fluid machinery: multiphase flow; flow control; internal flow stability and intelligent control of fluid machinery; fluid machinery multi-field coupling analysis; clean energy efficient utilization technology
Dr. Wei Wang

E-Mail Website
Guest Editor
College of Water Power and Hydropower, Xi'an University of Technology, Xi'an 710048, China
Interests: flow control; fluid machinery; aeroengine compressor stall theory and flow control; water jet propulsion pump stability and instability recovery methods; ventilator optimization design theory and industrial application of energy-saving technology; pipeline residual pressure power generation turbine development and application; high-entropy alloy development and wear-resistant hydraulic design

Special Issue Information

Dear Colleagues,

Hydraulic machinery is a mechanical equipment for the development and utilization of hydraulic energy resources to realize the mutual efficient conversion of hydraulic energy and mechanical energy, involving fluid dynamics, structural dynamics, mechanics, materials science and other multidisciplinary fields. It is based on the energy conversion relationship between water and machinery, and takes the hydraulic characteristics, dynamic characteristics and structural characteristics of pumps, water turbines, pump turbines, valves and other equipment as the main research object, in order to ensure the efficient and stable operation of hydraulic machinery system as the main task, and studies the influence of various factors on the energy characteristics, cavitation characteristics and operation stability of hydraulic machinery.

The research scope covers the design, manufacture, stable operation characteristics and unsteady operation characteristics of hydraulic machinery. The discipline of hydraulic machinery involves a wide range of fields and is related to the sustainable development of energy and ecology:

  • Hydraulic machinery energy-saving and efficient operation technology;
  • Prediction and control of complex flow in energy conversion systems and energy storage systems;
  • Multiphase/Multicomponent Flows in hydraulic machinery;
  • Fluid-structure interaction in hydraulic machinery;
  • Hydraulic machinery system dynamic characteristics, state monitoring and fault diagnosis;
  • Optimization design methods for hydro turbines;
  • Analysis of internal flow loss characteristics in hydraulic machinery.

Dr. Wei Dong
Dr. Zhengjing Shen
Dr. Wei Wang
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. Energies 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

  • design theory and structural characteristics of hydraulic machinery
  • unsteady complex eddy flow and flow control in hydraulic machinery
  • mechanism of cavitation and abrasion of hydraulic machinery
  • dynamic analysis of fluid solid coupling of hydraulic machinery
  • hydraulic machinery system dynamic characteristics, state monitoring and fault diagnosis

Published Papers (1 paper)

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Research

25 pages, 17149 KiB  
Article
Based on Wavelet and Windowed Multi-Resolution Dynamic Mode Decomposition, Transient Axial Force Analysis of a Centrifugal Pump under Variable Operating Conditions
by Haoqing Jiang, Wei Dong, Peixuan Li and Haichen Zhang
Energies 2023, 16(20), 7176; https://doi.org/10.3390/en16207176 - 20 Oct 2023
Cited by 1 | Viewed by 740
Abstract
This study analyzes the transient axial force of a centrifugal pump under variable operating conditions using wavelet analysis and a novel technique called windowed multi-resolution dynamic mode decomposition (wmrDMD). Numerically simulating the sampled time series allows the reconstruction of the impeller’s axial force [...] Read more.
This study analyzes the transient axial force of a centrifugal pump under variable operating conditions using wavelet analysis and a novel technique called windowed multi-resolution dynamic mode decomposition (wmrDMD). Numerically simulating the sampled time series allows the reconstruction of the impeller’s axial force information, providing validation for this innovative data-driven analysis technique. The comparison between the reconstructed results and the original axial force data demonstrates a remarkable agreement, as all data points exhibit error values below 2.49%. The wmrDMD technique systematically decomposes the impeller’s axial force field into dynamically significant modes across various time scales. Removing the mean flow field in this study resolves the transient motion of the impeller’s axial force, facilitating the identification of positions with high-frequency axial force oscillations and fluctuations in intensity amplitude. The high-frequency axial force of the impeller exhibits stable periodic variations within the operating range of 1.0nr-1.0Qr, whereas the changes are insignificant within the range of 0.4nr-0.4Qr. However, within the operating range of 1.0nr-0.4Qr, both the position and intensity amplitude of the axial force exhibit significant variations without a stable trend. Furthermore, cross-wavelet and wavelet coherence analyses reveal that within the operating range of 0.4nr-0.4Qr, the axial forces on the front and rear cover plates show the strongest correlation at the periodic scale. Within the operating range of 1.0nr-1.0Qr, the next highest correlation is observed, whereas the correlation is lowest within the 1.0nr-0.4Qr operating range. Full article
(This article belongs to the Special Issue Modeling and Optimization of Hydraulic Machinery and Its Systems)
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