Flow Inside the Sidewall Gaps of Hydraulic Machines: A Review

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F20%3APU138183" target="_blank" >RIV/00216305:26210/20:PU138183 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1996-1073/13/24/6617" target="_blank" >https://www.mdpi.com/1996-1073/13/24/6617</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/en13246617" target="_blank" >10.3390/en13246617</a>

Result language

angličtina

Original language name

Flow Inside the Sidewall Gaps of Hydraulic Machines: A Review

Original language description

The paper critically reviews the current state of the art in flow inside sidewall gaps of hydraulic pumps and turbines. It describes the consequences of the presence of this type of flow in turbomachinery and then relates it to other physical phenomena that determine the behavior, operating characteristics, and overall performance of the machine. Despite the small dimensions of the rotor-stator spaces, the flow in these regions can significantly affect the overall flow field and, consequently, efficiency. The circulation of the fluid inside the gaps and secondary flow that is caused by rotating elements influences the disk friction losses, which is of great importance, especially in the case of low specific speed pumps and turbines. The flow pattern affects the pressure distribution inside a machine and, thus, generates axial thrust. The presence of secondary flow also significantly changes the rotordynamics and can bring about undesirable vibrations and acoustics issues. This article aims to review and summarize the studies that were conducted on the mentioned phenomena. Experimental and numerical studies are both taken into consideration. It proposes some requirements for prospective research in order to fill current gaps in the literature and reveals the upcoming challenges in the design of hydraulic machines

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20301 - Mechanical engineering

Project

<a href="/en/project/EF16_026%2F0008392" target="_blank" >EF16_026/0008392: Computer Simulations for Effective Low-Emission Energy Engineering</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ENERGIES

ISSN

1996-1073

e-ISSN

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Volume of the periodical

13

Issue of the periodical within the volume

24

Country of publishing house

CH - SWITZERLAND

Number of pages

37

Pages from-to

1-37

UT code for WoS article

000602785100001

EID of the result in the Scopus database

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