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Symmetry
Special Issues
Applications of Fluid Machinery with Symmetry
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Applications of Fluid Machinery with Symmetry

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Computer".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 1846

Special Issue Editor

Dr. Zhengwei Wang

E-Mail Website
Guest Editor
Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Interests: fluid machinery and engineering

Special Issue Information

Dear Colleagues,

The internal flows of fluid machinery during operations exhibit not only symmetrical but also complex asymmetrical characteristics. Based on this, many studies on the theoretical models and simulation calculations of multiphase flow and multiphysics coupling characteristics of fluid machinery have been carried out in order to explore the performance changes caused by both symmetrical and asymmetrical characteristics. These studies have also been combined with engineering practice so that theoretical and technical research such as multiobject flow channel optimization design, multiphysics coupling dynamic characteristics analysis, and optimization performance analysis can also be developed. Topics of interest include:

  • Performance changes caused by asymmetrical characteristics
  • Hydraulic technology and hydraulic machinery
  • Multiphysics coupling
  • Optimal design of hydraulic machinery
  • Mathematical model and simulation technology
  • Experimental test technology

Dr. Zhengwei Wang
Guest Editor

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. Symmetry 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

  • performance changes caused by asymmetrical characteristics
  • hydraulic technology and hydraulic machinery
  • multiphysics coupling
  • optimal design of hydraulic machinery
  • mathematical model and simulation technology
  • experimental test technology

Published Papers (1 paper)

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Research

14 pages, 6411 KiB  
Article
Asymmetric Solid–Liquid Two-Phase Flow around a NACA0012 Cascade in Sediment-Laden Flow
by Lei Zhu, Haiping Zhang, Ying Chen, Xiaochao Meng and Li Lu
Symmetry 2022, 14(3), 540; https://0-doi-org.brum.beds.ac.uk/10.3390/sym14030540 - 07 Mar 2022
Viewed by 1603
Abstract
Sediment abrasion may cause the removal of material and efficiency loss to hydraulic machinery (hydro-turbine, pump, etc.), which may worsen the internal flow and endanger the safe operation of the machines. As abrasion is caused by the impact of sediment on the solid [...] Read more.
Sediment abrasion may cause the removal of material and efficiency loss to hydraulic machinery (hydro-turbine, pump, etc.), which may worsen the internal flow and endanger the safe operation of the machines. As abrasion is caused by the impact of sediment on the solid surface, the movement of particles determines the wear intensity. To understand the wear mechanism of hydraulic machinery, the motion characteristics of the asymmetric solid–liquid two-phase flow in a sediment-laden flow around NACA0012 cascades were studied. The laser particle imaging velocimetry (PIV) method was used to measure the flow of quartz particles with median diameters d50 of 82.7 μm, 65.9 μm, and 31.8 μm near the wall of cascades at an impact angle of 10° in a Venturi circuit. The flow characteristics and velocity slip between solid and liquid phases, as well as the effects of particle size and the Reynolds number on velocity slip, were analyzed. The results showed that: (1) the flow is asymmetrically distributed in front of the cascade’s leading edge at a 10° impact angle, and there is strong velocity slip between solid and liquid phases; (2) under the influence of particle inertia, the velocity of the solid phase is higher than that of the liquid phase in the deceleration stage, while the velocity of the solid phase is lower than that of liquid phase in the acceleration stage; (3) in the process of approaching the leading edge, the velocity difference between the solid and liquid phase increases by about 10% and the angle difference increases by about 8.8°. Full article
(This article belongs to the Special Issue Applications of Fluid Machinery with Symmetry)
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