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Experimental Study of Post-Dryout Heat Transfer in Annuli with Various Flow Obstacles
KTH, School of Engineering Sciences (SCI), Physics, Reactor Technology.
KTH, School of Engineering Sciences (SCI), Physics, Reactor Technology.ORCID iD: 0000-0001-5595-1952
2011 (English)In: Transactions of the American Nuclear Society, 2011Conference paper, Published paper (Refereed)
Abstract [en]

The influence of flow obstacles on post-dryout heat transfer at typical BWR operational conditions has been investigated in bilaterally heated annuli. The objective of the study is two-fold: (a) capture the net effect of various obstacles by comparing the experimental results obtained in the “obstacle-free” test section with the results obtained in a test section with obstacle; (b) obtain a high spatial resolution of wall temperature measurements to allow for a precise determination of the dry-patch location in the heated channel. Present study provides an extensive experimental database with more than 22000 heat transfer coefficient values in pre-, trans- and post-dryout regimes in a wide range of operational conditions: pressure equal to 5 and 7 MPa, water mass flux from 500 to 1750 kg/m2.s, inlet subcooling equal to 10 and 40 K. The heated wall temperature has been measured with 88 thermocouples located along 3.65 m long annulus with diameters 12.7x24.3 mm.

Place, publisher, year, edition, pages
2011.
Series
Transactions of the American Nuclear Society, ISSN 0003-018X ; 105
National Category
Energy Engineering
Research subject
SRA - Energy
Identifiers
URN: urn:nbn:se:kth:diva-80392OAI: oai:DiVA.org:kth-80392DiVA: diva2:496275
Conference
ANS Winter Meeting. Washington, D.C. October 30 - November 3, 2011
Funder
StandUp
Note

QC 20120412

Available from: 2012-02-09 Created: 2012-02-09 Last updated: 2014-08-25Bibliographically approved

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Anglart, Henryk

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