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International Journal of Photoenergy
Volume 2018, Article ID 7061826, 10 pages
Research Article

Phase Distribution for Subcooled Flow Boiling in an Inclined Circular Tube

CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu 610041, China

Correspondence should be addressed to JianJun Xu; moc.uhos@0002nujjux

Received 28 September 2017; Revised 6 December 2017; Accepted 4 January 2018; Published 15 March 2018

Academic Editor: Zhonghao Rao

Copyright © 2018 Wei Bao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An experimental investigation of phase distribution for subcooled flow boiling in an inclined circular tube (i.d. 24 mm) was conducted in this paper. The local interfacial parameters were measured by a double-sensor optical fiber probe, and the measurements were performed on three different directions in the inclined tube cross section. The experiment shows that the phase distribution under the inclined condition is different from the phase distribution under the vertical condition. The profiles skewed highly for and direction in the tube cross section, whereas the profile was also symmetrical at direction. These results can be explained by the fact that buoyancy caused the bubbles to move toward the top of the tube cross section under inclined condition. In addition, the typical distributions were also influenced by the inclination angles.