Comprehensive analysis of fluid-film instability in journal bearings with mechanically indented textures
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F23%3APU150535" target="_blank" >RIV/00216305:26210/23:PU150535 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23520/23:43967023
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0022460X2200637X" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022460X2200637X</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jsv.2022.117454" target="_blank" >10.1016/j.jsv.2022.117454</a>
Alternative languages
Result language
angličtina
Original language name
Comprehensive analysis of fluid-film instability in journal bearings with mechanically indented textures
Original language description
This paper theoretically and experimentally investigates the effects of textures produced by a mechanical indentation on the stability of journal bearings. The research primarily aims at lightly loaded journal bearings used, e.g. in vertical rotors and microturbines. The results show that textures located close to the minimum oil film thickness can noticeably improve the stability at low specific loads but have only a negligible effect at a specific load of 0.15 MPa. The texturing also impacts the bearing temperature, which is closely related to the bearing friction. Since the textured journal bearings are prone to the formation of cavities in the oil film, the paper also deals with computational methods. It is demonstrated that an accurate estimate of stability threshold requires very dense computational meshes, which are impractical for mass-conserving treatment of cavitation due to CPU requirements. Interestingly, errors due to non-conservation of mass are up to the same magnitude as uncertainties due to employed numerical algorithms. The results demonstrate that numerical results describing lightly-loaded textured journal bearings are very sensitive to the density of the computational mesh. Hence, the simplified cavitation treatment can be legitimate in applications where the CPU time is a concern, such as the optimisation, iterative algorithms and time-integration of equations of motion.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
JOURNAL OF SOUND AND VIBRATION
ISSN
0022-460X
e-ISSN
1095-8568
Volume of the periodical
546
Issue of the periodical within the volume
03
Country of publishing house
US - UNITED STATES
Number of pages
22
Pages from-to
„“-„“
UT code for WoS article
000902165200003
EID of the result in the Scopus database
2-s2.0-85144068001