Study on Flow Characteristics of Cryogenic Hybrid Journal Bearings

In the present study, a flow visualization experiment in the clearance between a clear floating-ring and a rotating journal was carried out in order to clarify the effect of the sweepback angle (θs) of the leading edge of the recess on the flow characteristics. Four types of the floating-r...

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Autores principales:	Mamoru Oike, Masataka Kikuchi, Satoshi Takada, Takayuki Sudo, Tomoyuki Takano
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2016
Materias:	journal bearing cryogenic turbopump flow visualization recess sweepback angle cavitating flow liquid nitrogen Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/1617605f3d6945a587bfa8a78fd2e6cb
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id	oai:doaj.org-article:1617605f3d6945a587bfa8a78fd2e6cb
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spelling	oai:doaj.org-article:1617605f3d6945a587bfa8a78fd2e6cb2021-11-05T09:21:12ZStudy on Flow Characteristics of Cryogenic Hybrid Journal Bearings1881-219810.2474/trol.11.583https://doaj.org/article/1617605f3d6945a587bfa8a78fd2e6cb2016-09-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/11/5/11_583/_pdf/-char/enhttps://doaj.org/toc/1881-2198In the present study, a flow visualization experiment in the clearance between a clear floating-ring and a rotating journal was carried out in order to clarify the effect of the sweepback angle (θs) of the leading edge of the recess on the flow characteristics. Four types of the floating-rings with different recess geometries, i. e., the Young Leaf Mark, the square and the non-recessed geometries, were operated at a rotational speed of up to 45,000 rpm using liquid nitrogen as the working fluid to observe the interaction between source flow from the recess and rotating flow induced by the journal rotation in the clearance. The cavitation cloud inside the clearance was induced by viscous frictional heating and the pressure drop. The influence of the θs value on the flow characteristics was investigated by comparing flow coefficient (Cf) and the cavitation cloud area ratio (Ac) obtained from the visual image. Based on the experimental results, the dependence of the flow characteristics on the rotational speed was confirmed to be affected by the sweepback angle of the leading edge of the recess.Mamoru OikeMasataka KikuchiSatoshi TakadaTakayuki SudoTomoyuki TakanoJapanese Society of Tribologistsarticlejournal bearingcryogenic turbopumpflow visualizationrecess sweepback anglecavitating flowliquid nitrogenPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 11, Iss 5, Pp 583-593 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	journal bearing cryogenic turbopump flow visualization recess sweepback angle cavitating flow liquid nitrogen Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	journal bearing cryogenic turbopump flow visualization recess sweepback angle cavitating flow liquid nitrogen Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Mamoru Oike Masataka Kikuchi Satoshi Takada Takayuki Sudo Tomoyuki Takano Study on Flow Characteristics of Cryogenic Hybrid Journal Bearings
description	In the present study, a flow visualization experiment in the clearance between a clear floating-ring and a rotating journal was carried out in order to clarify the effect of the sweepback angle (θs) of the leading edge of the recess on the flow characteristics. Four types of the floating-rings with different recess geometries, i. e., the Young Leaf Mark, the square and the non-recessed geometries, were operated at a rotational speed of up to 45,000 rpm using liquid nitrogen as the working fluid to observe the interaction between source flow from the recess and rotating flow induced by the journal rotation in the clearance. The cavitation cloud inside the clearance was induced by viscous frictional heating and the pressure drop. The influence of the θs value on the flow characteristics was investigated by comparing flow coefficient (Cf) and the cavitation cloud area ratio (Ac) obtained from the visual image. Based on the experimental results, the dependence of the flow characteristics on the rotational speed was confirmed to be affected by the sweepback angle of the leading edge of the recess.
format	article
author	Mamoru Oike Masataka Kikuchi Satoshi Takada Takayuki Sudo Tomoyuki Takano
author_facet	Mamoru Oike Masataka Kikuchi Satoshi Takada Takayuki Sudo Tomoyuki Takano
author_sort	Mamoru Oike
title	Study on Flow Characteristics of Cryogenic Hybrid Journal Bearings
title_short	Study on Flow Characteristics of Cryogenic Hybrid Journal Bearings
title_full	Study on Flow Characteristics of Cryogenic Hybrid Journal Bearings
title_fullStr	Study on Flow Characteristics of Cryogenic Hybrid Journal Bearings
title_full_unstemmed	Study on Flow Characteristics of Cryogenic Hybrid Journal Bearings
title_sort	study on flow characteristics of cryogenic hybrid journal bearings
publisher	Japanese Society of Tribologists
publishDate	2016
url	https://doaj.org/article/1617605f3d6945a587bfa8a78fd2e6cb
work_keys_str_mv	AT mamoruoike studyonflowcharacteristicsofcryogenichybridjournalbearings AT masatakakikuchi studyonflowcharacteristicsofcryogenichybridjournalbearings AT satoshitakada studyonflowcharacteristicsofcryogenichybridjournalbearings AT takayukisudo studyonflowcharacteristicsofcryogenichybridjournalbearings AT tomoyukitakano studyonflowcharacteristicsofcryogenichybridjournalbearings
_version_	1718444393072951296

Study on Flow Characteristics of Cryogenic Hybrid Journal Bearings

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