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Proceedings of Symposium on Energy Engineering in the 21<sup>st</sup> Century (SEE2000) Volume I-IV

ISSN:
1-56700-132-7 (Print)

EXPERIMENTAL STUDY ON PHASE DISTRIBUTION IN INCLINED SUBCOOLED BOILING ANNULUS

T. H. Lee
Department of Nuclear Engineering, Seoul National University, San 56-1 Shinlim-dong, Gwanak-gu, Seoul 151-742, Korea

M. O. Kim
Department of Nuclear Engineering, Seoul National University, San 56-1 Shinlim-dong, Gwanak-gu, Seoul 151-742, Korea

H. K. Cho
Department of Nuclear Engineering, Seoul National University, San 56-1 Shinlim-dong, Gwanak-gu, Seoul 151-742, Korea

Goon Cherl Park
Department of Nuclear Engineering, Seoul National University, Shillim-Dong, Gwanak-Gu, Seoul 151-742, Korea

Abstract

The profiles of local vapor phase parameters over the cross section were measured in the inclined subcooled boiling in a concentric annulus with a uniformly heated inner tube. Two-conductivity probe technique was applied to measure the local values of interfacial parameters such as void fraction and interfacial area concentration. Experiments were conducted for five angles of inclination (0° (vertical), 15°, 30°, 45°, 60°) and flow conditions were controlled by mass flux, heat flux and inlet subcooling for each inclination. Based on the measurements, the influences of channel inclination and flow conditions on the profiles were investigated for understanding those effects on the internal phase distribution of inclined boiling flow.