Nondimensional Expression of Volumetric Fractions of Gas-Liquid-Solid Three-Phase Bubbly Flow in Vertical Pipes : Application of the Multiplier Method

概要

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In order to provide basic information on the multiphase flow encountered in hypothetical severe accidents of nuclear power plants, the volumetric fractions in air-water-particle three-phase bubbly flows were measured in vertical straight pipes of three different inside diameters: 20.9, 30.8 and 50.4mm. Their heights were about 10m. The mean diameters of spherical particles used were 1.15, 2.56 and 4.16mm. Their densities ranged from 2270 to 2400kg/m^3. Experimental data on the volumetric fractions are offered, and effects of the volumetric flux, pipe diameter and particle diameter on the volumetric fractions are discussed. Their empirical nondimensional correlations are proposed as a universal expression in terms of dimensionless parameters related to geometrical and dynamical similarity, which are based on the multiplier method used for the estimation of frictional pressure drop. The estimation results agreed well with the experimental data.
一般社団法人日本機械学会の論文
1993-08-15