On post-dryout heat transfer in channels with flow obstacles
2014 (English)In: Nuclear Engineering and Design, ISSN 0029-5493, E-ISSN 1872-759X, Vol. 270, 351-358 p.Article in journal (Refereed) Published
This paper describes a new approach to predict post-dryout heat transfer in channels with flow obstacles. Using experimental data obtained in annular test sections at prototypical BWR conditions, the existing Saha correlation for post-dryout heat transfer has been modified to account for the presence of obstacles. The obstacle effect is taken into account in the following way: (a) the critical quality downstream of an obstacle is found; (b) an exponential function of equilibrium quality is applied to describe the decrease of heat transfer coefficient in the developing post-dryout region; (c) an additional heat transfer enhancement term is applied downstream of the obstacle. The new approach is applied to annular test sections with various flow obstacles and a significant improvement of accuracy of wall temperature prediction, as compared to reference methods, is shown.
Place, publisher, year, edition, pages
2014. Vol. 270, 351-358 p.
Critical quality, Flow obstacles, Heat Transfer enhancement, In-channels, New approaches, Reference method, Test sections, Wall temperatures
IdentifiersURN: urn:nbn:se:kth:diva-143220DOI: 10.1016/j.nucengdes.2014.02.005ISI: 000335206100032ScopusID: 2-s2.0-84896760059OAI: oai:DiVA.org:kth-143220DiVA: diva2:706107
QC 20140603. Updated from manuscript to article in journal.2014-03-192014-03-192014-06-03Bibliographically approved