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contributor authorVoitus, Anthony
contributor authorArghir, Mihai
contributor authorHassini, Mohamed-Amine
date accessioned2025-04-21T10:13:19Z
date available2025-04-21T10:13:19Z
date copyright10/26/2024 12:00:00 AM
date issued2024
identifier issn0742-4795
identifier othergtp_147_04_041013.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4305736
description abstractWater-lubricated hydrodynamic journal bearings with deep inclined grooves are often used to support radial loads and dampen pump vibrations in nuclear power plants. The inclined grooves increase the pumping effect of the lubricant thus reducing wear and friction during rotor startup and coast-down. The deep grooves also facilitate the removal of debris without damaging the bearing. The load capacity and the stability of this type of bearing are studied in the present work. A sensitivity study of the impact of the number of grooves on bearing performance underlined the superiority of the journal bearing with two inclined grooves. Moreover, these journal bearings may operate with a mixture of water and air. This compressible two-phase lubricant will modify the load capacity and the stability of the journal bearing. The impact of the ingested volume fraction of air is therefore investigated. A physical model of the homogeneous air–water mixture linking the local air volume fraction with the pressure was used in conjunction with the numerical solution of the compressible Reynolds equation on an unstructured grid. It was found that the air ingestion in the two-inclined grooves journal bearing decreases the load capacity but improves the stability for mild and low loads.
publisherThe American Society of Mechanical Engineers (ASME)
titleThe Effect of Air–Water Mixture on the Dynamic Response of a Hydrodynamic Journal Bearing With Inclined Grooves
typeJournal Paper
journal volume147
journal issue4
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.4066716
journal fristpage41013-1
journal lastpage41013-8
page8
treeJournal of Engineering for Gas Turbines and Power:;2024:;volume( 147 ):;issue: 004
contenttypeFulltext


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