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Multiphase Science and Technology
SJR: 0.183 SNIP: 0.483 CiteScore™: 0.5

ISSN Druckformat: 0276-1459
ISSN Online: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v26.i2.10
pages 83-137

EXPERIMENTAL DATA ON PHASE DISTRIBUTION IN THE UPWARD HIGH PRESSURE STEAM-WATER FLOWIN A VERTICAL TUBE UNDER ANNULAR-DISPERSED REGIME. PART 2. STRUCTURAL AND LOCAL HYDRODYNAMIC CHARACTERISTICS OF FLOW

P. L. Kirillov
State Scientific Center of Russian Federation−Institute for Physics & Power Engineering, 249033 Obninsk, Kaluga Region, Russian Federation
Yu. Yu. Shtein
State Scientific Center of Russian Federation−Institute for Physics & Power Engineering, 249033 Obninsk, Kaluga Region, Russian Federation
R. V. Shumsky
State Scientific Center of Russian Federation−Institute for Physics & Power Engineering, 249033 Obninsk, Kaluga Region, Russian Federation
Yu. D. Levchenko
State Scientific Center of Russian Federation−Institute for Physics & Power Engineering, 249033 Obninsk, Kaluga Region, Russian Federation

ABSTRAKT

Results of experimental research of the local hydrodynamic characteristics of the upward steam-water flow in a vertical tube with the internal diameter of 13 and 17 mm under pressure of 4.9-13.7 MPa are considered. In the course of these experiments, the geometrical liquid film parameters, frictional pressure drop (ΔPfr), shear stress at a channel wall, the mean actual volumetric void fraction (φsub>vol), and the cross-sectional average void fraction (φc-s) were determined. It was found that the frictional pressure drop in the upward high pressure two-phase flow under the fully developed annular-dispersed regime can be calculated as in the case of the single-phase flow in tubes with the regular roughness. The calculated values of ΔPfr are in agreement with the experimental data within ±15%. Ten correlations were evaluated against the experimental data on the void fraction φc-s. The Cioncolini-Thome equation for void fraction in the annular two-phase flow provides the best prediction among them with accuracy ±2.6%. The database containing about 3000 experimental points is given in tabular forms (see Parts 1 and 2 of this paper).


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