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Specific peculiarities of the jets penetrating the liquid pool of different density under severe accidents at the NPP conditions and their modeling and simulation
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
2012 (English)In: WSEAS Transactions on Applied and Theoretical Mechanics, ISSN 1991-8747, E-ISSN 2224-3429, Vol. 7, no 4, 276-287 p.Article in journal (Refereed) Published
Abstract [en]

The paper is devoted to one of the problems of the modelling and simulation of the severe accidents at the nuclear power plants (NPP) in touch with development and operation of the passive protection systems against severe accidents. The results of the mathematical modelling and simulation of the jets penetrating the pool of other liquid under diverse conditions as well as an analysis of the experimental data have clearly shown that the falling buoyant jets penetrating the pool of other liquid differ a lot from the classical jets moved by pressure gradient. For example, the classic scheme with monotone jet radius evolution does not work in this case. There is clearly observed phenomenon that jet is going with nearly constant radius up to some point in a pool, then at the point of "bifurcation" it substantially changes its radius abruptly (jet switches its one constant radius to the another one). These specific peculiarities of the penetrating jets are discussed and mathematical modelling of the problem is considered.

Place, publisher, year, edition, pages
2012. Vol. 7, no 4, 276-287 p.
Keyword [en]
Bifurcation, Jet, Mathematical modelling, Non-linear phenomenon, Passive protection system, Penetration, Pool, Switch of radius
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-144810Scopus ID: 2-s2.0-84885233565OAI: oai:DiVA.org:kth-144810DiVA: diva2:717062
Note

QC 20140514

Available from: 2014-05-14 Created: 2014-04-29 Last updated: 2017-12-05Bibliographically approved

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