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Bang, In Cheol
Nuclear Thermal Hydraulics and Reactor Safety Lab.
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dc.citation.endPage 1229 -
dc.citation.startPage 1216 -
dc.citation.title INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER -
dc.citation.volume 89 -
dc.contributor.author Sea, Han -
dc.contributor.author Park, Seong Dae -
dc.contributor.author Bin Seo, Seok -
dc.contributor.author Heo, Hyo -
dc.contributor.author Bang, In Cheol -
dc.date.accessioned 2023-12-22T00:40:49Z -
dc.date.available 2023-12-22T00:40:49Z -
dc.date.created 2015-09-25 -
dc.date.issued 2015-10 -
dc.description.abstract This paper presents experimental swirl generation measurements using a flow-driven rotating vane for heat transfer and critical heat flux enhancement in subchannels. In nuclear power plants, there are swirl generators, which are located on the top of the structural grids in the fuel assemblies. The mixing vanes are fixed on the spacer grids, thus there would be a limit for enhancing heat transfer performance because of the fixed positions. An innovative swirl generator, called moving rotational vane, was used to enhance heat transfer performance as well as critical heat flux by maximizing centrifugal force due to the swirl flow on the spacer grid. The experiments were conducted in vertical and horizontal flow experimental facilities using three types of vanes: (1) spacer grid (SG), (2) fixed split vane (FSV), and (3) moving rotational vane (MRV). Particle image velocimetry was applied to visualize the flow characteristics along the test sections; averaged velocity fields, averaged velocity vector components u and v, lateral and longitudinal flow distributions, turbulence intensities, and swirl ratio were analyzed. Computational fluid dynamics analysis was performed to show the effect of swirl generation and an air bubble injection experiment was conducted to show the effect of using the MRV. The pressure drop observed from the experiment using the SG, FSV, and MRV was 0.85, 1.97 and 2.59 kPa, respectively. On the other hand, in the CFD analysis, the pressure drop of the SG, FSV, and MRV was 1.86, 1.95, and 2.01 kPa at the same measurement length of the experiment, respectively. Swirl ratio was analyzed for the FSV and MRV. The swirl ratio of the MRV showed higher value compared to the FSV including conventional fixed split vanes. The analysis showed that the MRV induced the most powerful swirl generation. The MRV could provide secondary flow structures such as mixing and turbulence; thus, enhanced heat transfer as well as critical heat flux performance could be expected. (C) 2015 Elsevier Ltd. All rights reserved -
dc.identifier.bibliographicCitation INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.89, pp.1216 - 1229 -
dc.identifier.doi 10.1016/j.ijheatmasstransfer.2015.06.041 -
dc.identifier.issn 0017-9310 -
dc.identifier.scopusid 2-s2.0-84935029483 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/17178 -
dc.identifier.url http://www.sciencedirect.com/science/article/pii/S0017931015006638 -
dc.identifier.wosid 000359029600116 -
dc.language 영어 -
dc.publisher PERGAMON-ELSEVIER SCIENCE LTD -
dc.title Swirling performance of flow-driven rotating mixing vane toward critical heat flux enhancement -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Thermodynamics; Engineering, Mechanical; Mechanics -
dc.relation.journalResearchArea Thermodynamics; Engineering; Mechanics -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor Moving rotational vane -
dc.subject.keywordAuthor Fixed split vane -
dc.subject.keywordAuthor Spacer grid -
dc.subject.keywordAuthor CHF enhancement -
dc.subject.keywordPlus ROD BUNDLE -
dc.subject.keywordPlus SPACER-GRIDS -
dc.subject.keywordPlus SUBCHANNEL -
dc.subject.keywordPlus TURBULENCE -

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