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Compressible two-phase viscous flow investigations of cavitation dynamics for the ittc standard cavitator

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Viitanen, Ville M.
dc.contributor.author Sipilä, Tuomas
dc.contributor.author Sánchez-Caja, Antonio
dc.contributor.author Siikonen, Timo
dc.date.accessioned 2020-10-30T12:44:47Z
dc.date.available 2020-10-30T12:44:47Z
dc.date.issued 2020-10-07
dc.identifier.citation Viitanen , V M , Sipilä , T , Sánchez-Caja , A & Siikonen , T 2020 , ' Compressible two-phase viscous flow investigations of cavitation dynamics for the ittc standard cavitator ' , Applied Sciences (Switzerland) , vol. 10 , no. 19 , 6985 , pp. 1-23 . https://doi.org/10.3390/app10196985 en
dc.identifier.issn 2076-3417
dc.identifier.other PURE UUID: 2f989cf6-95b8-46b2-a22b-71533e6d3309
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/2f989cf6-95b8-46b2-a22b-71533e6d3309
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85092758417&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/52390558/ENG_Viitanen_et_al_Compressible_Two_Phase_Viscous_Applied_Sciences.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/47310
dc.description.abstract In this paper, the ITTC Standard Cavitator is numerically investigated in a cavitation tunnel. Simulations at different cavitation numbers are compared against experiments conducted in the cavitation tunnel of SVA Potsdam. The focus is placed on the numerical prediction of sheet-cavitation dynamics and the analysis of transient phenomena. A compressible two-phase flow model is used for the flow solution, and two turbulence closures are employed: a two-equation unsteady RANS model, and a hybrid RANS/LES model. A homogeneous mixture model is used for the two phases. Detailed analysis of the cavitation shedding mechanism confirms that the dynamics of the sheet cavitation are dictated by the re-entrant jet. The break-off cycle is relatively periodic in both investigated cases with approximately constant shedding frequency. The CFD predicted sheet-cavitation shedding frequencies can be observed also in the acoustic measurements. The Strouhal numbers lie within the usual ranges reported in the literature for sheet-cavitation shedding. We furthermore demonstrate that the vortical flow structures can in certain cases develop striking cavitating toroidal vortices, as well as pressure wave fronts associated with a cavity cloud collapse event. To our knowledge, our numerical analyses are the first reported for the ITTC standard cavitator. en
dc.format.extent 23
dc.format.extent 1-23
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Springer International Publishing AG
dc.relation.ispartofseries Applied Sciences (Switzerland) en
dc.relation.ispartofseries Volume 10, issue 19 en
dc.rights openAccess en
dc.title Compressible two-phase viscous flow investigations of cavitation dynamics for the ittc standard cavitator en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department VTT Technical Research Centre of Finland
dc.contributor.department ABB Group
dc.contributor.department Department of Mechanical Engineering
dc.subject.keyword Compressible two-phase flow
dc.subject.keyword Hydrodynamic cavitation
dc.subject.keyword System instabilities
dc.subject.keyword Turbulence modelling
dc.identifier.urn URN:NBN:fi:aalto-202010306193
dc.identifier.doi 10.3390/app10196985
dc.type.version publishedVersion

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