Film flow measurements for high-pressure diabatic annular flow in tubes with various axial power distributions
2006 (English)In: Nuclear Engineering and Design, ISSN 0029-5493, E-ISSN 1872-759X, Vol. 236, no 23, 2485-2493 p.Article in journal (Refereed) Published
Measurements of film flow rates in diabatic annular flow in tubes with various axial power distributions were carried out in the high-pressure two-phase flow loop at the Royal Institute of Technology (KTH), Sweden. The measurements were performed at conditions typical for boiling water reactors, i.e. 7 MPa pressure and total mass flux in a range from 750 to 1750 kg/m(2)s. Four different axial power distributions were used and the film mass flow was measured at 7 axial locations for each set of boundary conditions. The results show that the outlet peaked distribution gives less film than the inlet peaked one. This result is consistent with well known trends from measurements of dryout power. The measurements also show that the film flow at the onset of dryout is very small at investigated conditions in agreement with earlier studies. Finally it is shown that the present data is well predicted by two selected phenomenological models of annular flow.
Place, publisher, year, edition, pages
2006. Vol. 236, no 23, 2485-2493 p.
Axial power distributions, Film flow measurements, Mass flow
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-13430DOI: 10.1016/j.nucengdes.2006.03.002ISI: 000241899800007ScopusID: 2-s2.0-33749614541OAI: oai:DiVA.org:kth-13430DiVA: diva2:325309
QC 201006182010-06-182010-06-182010-11-08Bibliographically approved