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A reinterpretation of measurements in developing annular two-phase flow
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: Nuclear Engineering and Design, ISSN 0029-5493, E-ISSN 1872-759X, Vol. 241, no 11, 4562-4567 p.Article in journal (Refereed) Published
Abstract [en]

Measurements of developing films in adiabatic high pressure steam-water flow in annular geometry have been reanalyzed and compared to a linearized film-flow model. The development rate of the outer film could be determined with good accuracy in four cases. In one case it was also possible to conclude that the inner film develops faster than the outer one. When compared to the linearized model, these observations show that the deposition rate has to be almost independent of the drop concentration at the investigated conditions. Furthermore, any significant deposition by direct impaction of drops can be excluded as it would couple the development of the two films. These conclusions are quite general and do not depend on the use of any particular correlation for the deposition or entrainment rates. Finally, a rough estimate of the deposition rate was possible, confirming that deposition rates are considerably lower at high pressure steam-water flows than in air-water flows.

Place, publisher, year, edition, pages
2011. Vol. 241, no 11, 4562-4567 p.
Keyword [en]
Annular flow, Annulus, Film, Dryout, Asymmetry
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-61004DOI: 10.1016/j.nucengdes.2011.01.002ISI: 000297456000025ScopusID: 2-s2.0-80255126146OAI: diva2:478459
QC 20120116Available from: 2012-01-16 Created: 2012-01-16 Last updated: 2012-01-16Bibliographically approved

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Adamsson, CarlAnglart, Henryk
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