Application of a cavitation algorithm on investigation of kinematically excited imbalanced rotors supported by short bearings with a central groove

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F04%3A00010505" target="_blank" >RIV/61989100:27230/04:00010505 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Application of a cavitation algorithm on investigation of kinematically excited imbalanced rotors supported by short bearings with a central groove

Original language description

An important factor that influences properties of hydrodynamical bearings is a vapour cavitation. It represents a complex of physical processes that take place in the bearing gap due to boiling of the oil and liberation of the gases dissolved in it if the pressure drops below a critical level ( approximately pressure of saturated oil vapour at given temperature ). The observations carried out by Zeidan and Vance proved that pressure of the medium in cavitated regions remained approximately constant. After increase of the pressure the vapour bubbles collapse and the gas phase is immediately changed into a liquid one. Results of the research carried out by both investigators imply that a vapour cavitation reduces load capacity of the bearings. But on theother hand the cavitation decreases friction in the bearing gap, energy losses, resistance against the rotor rotation, and heating of the lubricant and therefore it is not always undesirable.

Czech name

Aplikace kavitačního algoritmu pro zkoumání kinematicky buzených nevyvážených rotorů uložených v krátkých ložiskách s centrální drážkou

Czech description

An important factor that influences properties of hydrodynamical bearings is a vapour cavitation. It represents a complex of physical processes that take place in the bearing gap due to boiling of the oil and liberation of the gases dissolved in it if the pressure drops below a critical level ( approximately pressure of saturated oil vapour at given temperature ). The observations carried out by Zeidan and Vance proved that pressure of the medium in cavitated regions remained approximately constant. After increase of the pressure the vapour bubbles collapse and the gas phase is immediately changed into a liquid one. Results of the research carried out by both investigators imply that a vapour cavitation reduces load capacity of the bearings. But on theother hand the cavitation decreases friction in the bearing gap, energy losses, resistance against the rotor rotation, and heating of the lubricant and therefore it is not always undesirable.

Type

D - Article in proceedings

CEP classification

JR - Other machinery industry

OECD FORD branch

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Project

<a href="/en/project/GA101%2F02%2F0011" target="_blank" >GA101/02/0011: New approach to the analysis of dynamic behaviour of nonlinear coupling elements using in rotor dynamic systems</a><br>

Continuities

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

Publication year

2004

Confidentiality

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

Article name in the collection

Proceedings of the IX. International Conference on the Theory of Machines in association with the II. CEACM Conference on Computational Mechanics

ISBN

80-7083-847-7

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

859-864

Publisher name

TU Liberec

Place of publication

Liberec

Event location

Liberec

Event date

Sep 1, 2004

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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